50 Megabits for the masses, the new Sony PMW-200.

5 years is a long time in the video world. Cameras come and go, technologies change, but for 5 years there has been one camera that has remained essentially unchanged and that’s the versatile and well regarded Sony EX1 and EX1R.

Alister shooting with an EX1 in the Arctic.

5 years ago I was asked by Sony to review a new handheld camcorder, that camcorder was the EX1. A camera that went on to change the way I work and the way many production companies work, because for the first time you had a handheld camera that could take on the bulky shoulder mounts in terms of picture quality.

The EX1 was the first handheld camcorder to offer full resolution and low noise HD pictures thanks to it’s 3 half inch 1920 x 1080 sensors. Not only did it have great image quality but it also had a great lens with 3 separate rings for focus, iris and zoom with accurate calibrated scales on each, this was a real cameraman’s camera, a delight to use compared to anything similar that had come before.

Alister shooting a severe storm with an EX1

As a result the EX1, EX1R and the semi shoulder version the EX3, became the industry standard for handheld production. I owned one of each and never, ever, regretted my purchases. However, there has always been one small limitation with the EX camera line. They record using XDCAM EX Mpeg 2 at 35 Mbit/s. Personally I have never had a problem with this, I think the recorded pictures are fantastic, but the EBU (European Broadcasting Union) has very specific minimum specifications for broadcast television production. There are several tiers within the specifications and the EX cameras are permitted by the EBU within tier 2J for use in news and video journalism, but for long form productions the minimum bit rate for recording is 50 Mbit/s with 4:2:2 colour space. This restriction means that for long form broadcast television production  in Europe you can only use an EX1 or EX3 with the use of an external recorder.  Many production companies do exactly this, an EX camcorder with a NanoFlash is one of the standard set ups approved for many broadcast programmes. In the last couple of years other manufacturers have produced handheld cameras that meet the 50 Mbit/s 4:2:2 recording minimum and some of these have been approved for use in broadcast productions. But most of these cameras don’t have the large ½” sensors of the EX cameras so often struggle in low light. Low light performance is often critical in observational documentaries’ and many of the other types of programmes that involve the use of handheld camcorders.

Now, all that’s about to change. You see, Sony have been listening and as a result of customer feedback they developed the new PMW-200 handheld camcorder.

The new Sony PMW-200
Alister filming with the PMW-200

Designed to meet the needs of broadcast productions the camera records on to solid state media using 50 Mbit/s 4:2:2 XDCAM HD. This is the exact same codec as used in the highly regarded PDW-700, F800 and PMW-500 shoulder mount broadcast camcorders. As well as 50 Mbit/s 4:2:2 you can also record using the same 35 Mbit/s 4:2:0 codec as the original EX cameras as well as standard definition DV. When your using the XDCAM HD422 codec you have the ability to copy your footage as video clips directly to Sony’s XDCAM optical disc system for easy and reliable long term storage and archive. A further benefit of this is that when you copy the clips to an XDCAM Professional Disc you will automatically generate proxy files on the disc, so if you already use proxies in your workflow you can now extend this to all your footage.

But what about the image quality? There’s little point in having a great codec if the front end of the camera can’t deliver great pictures. The PMW-200 uses essentially the same sensors and lens as the EX1R, so the image quality is very good.

Frame grab from PMW-200. Click on the image to enlarge.

The lens is made by Fujinon and is a 14x zoom starting at 5.8mm. It has 3 rings, one each for focus, zoom and iris. Each is marked with accurate calibration marks. The focus ring slides forwards for auto focus and slides back for full manual control. In manual it behaves and feels like a true pro broadcast lens.

The PMW-200 lens.
The lens and camera front end.

The zoom ring can be used manually or it can be servo driven and controlled by the main zoom rocker on the hand grip or a small zoom rocker on the handle. This zoom has an improved servo design and as a result slow zooms are a little smoother than on the EX1R.  The iris ring can be switched between auto and manual and is silky smooth. Should you choose you can add an offset of up to +/- 2 stops to the auto iris to help deal with tricky lighting situations, the widest aperture is a very useful f1.9.  Because this lens is very similar to the original EX lens you can use the same Sony zoom through wide angle adapter if you need extra wide shots and it has the same connector for remote zoom control. One small improvement is the lens servo motor. The PMW-200 lens has an improved servo that give better slow zoom performance. It’s not quite up to broadcast lens smoothness but it’s an improvement over the EX1R.

Side view of the PMW-200
PMW-200 lens, very similar to EX1.

 

Between the lens and the sensors there are 2 ND filters operated by a sliding switch giving you 3 positions, clear, 1/8th  (0.9 or 3 stops)  and 1/64th  (1.8 or 6 stops) so the camera can cope with the vast majority of lighting situations without the need for additional filtration. The 3 sensors are the same 1920×1080 ½” sensors that made the EX cameras so special. There have been some improvements to the image processing and noise reduction in the cameras electronics and as a result there is a small reduction in noise and as a result useable sensitivity.

You can see the reduction in noise in my frame grabs from both a PMW-200 and EX1R.  In my opinion the EX1R was the benchmark for image quality in a handheld camera and I think we are close to the limits of the sensitivity that can be achieved with current sensor technologies. So I don’t think it is a surprise that there isn’t a dramatic change. The small improvements are most welcome and I really like the images the PMW-200 produces.

Noise comparison at +9db gain between RX1R and PMW-200

The pictures are rich and organic looking, they have very good dynamic range, I estimate a little over 11 stops and the noise levels are low enough to allow the judicious use of a little gain where needed. Sure there is a little more noise than you would get with a modern 2/3” or Super35mm camcorder but that’s just down to the laws of physics. Bigger sensors and bigger pixels give a better signal to noise ratio and being realistic your not going to fit 3x 2/3” sensors in a handheld camera. The half inch design of the PMW-200 is a great compromise, small enough for a compact handheld design, but big enough to give good low light performance and dynamic range. This isn’t just my opinion, this is also borne out by the EBU’s specification for long form broadcast production. The specification is know as EBU R 118 (http://tech.ebu.ch/docs/r/r118.pdf ) and for long form programmes (tier 2L) the EBU specifies a minimum of 3 full resolution half inch 1920×1080 sensors (there is an exception for 3 x 1/3” camera’s that can be shown to meet additional testing criteria) recording to a minimum of 50 Mbit/s 4:2:2 and the PMW-200 fully complies with this.

Frame grab from the PMW-200. Click on the image to enlarge.

Picture Profiles: As with every other XDCAM camcorder the PMW-200 gives the end user the ability customise many aspects of the images it produces.  This is done through the use of the Picture Profiles menu.  You can change the cameras gamma curves to fine tune the dynamic range and contrast in the pictures. There are 6 standard gamma curves which can be used in conjunction with either an automatic knee or manual knee as well as 4 Hypergamma curves.

PMW-200 Standard Gamma

Standard gamma 5 is a REC-709 compliant gamma curve and is the default gamma. The Hypergammas are the same curves as used on the PMW-500 and PDW-700. These are very useful as they offer improved dynamic range (460%) compared to the standard gammas but more importantly they do not use conventional knee compression.

PMW-200 Hypergamma 4 (need to correct the caption on the picture!)

The Hypergammas gently roll off highlights in a much more natural looking way than the harsh electronic looking compression that a traditional knee circuit introduces. Hypergammas 1 & 2 are broadcast safe, never recording above 100%. Hypergammas 3 & 4 have the same curves as 1 & 2 but allow the use of superwhite recording levels (109%) to give you a little more data to play with in post production.

PMW-200 Default settings.

As well as gamma the picture profiles allow you to choose from 6 different preset colour matrices and allow you to modify the colour saturation and colour vectors. This makes it easy to match the PMW-200 to other cameras or to create a number of in-camera looks. Matrix 1 gives a warm look with a little extra red, 3 is a little less vibrant, 5 & 6 give deeper blues with 6 being a little less saturated than 5.

PMW-200 Custom Picture Profile.

If you want a sharper looking picture you can use the detail controls to boost the edge contrast enhancement. Just be aware that too much detail correction can lead to ugly black edges around objects. Reducing the detail level below -20 starts to soften the picture if you want a slightly defocused look. As well as the detail controls there is also a separate control for aperture correction. This is a high frequency boost that can be used to enhance subtle textures and fine details on things like fabrics. I found that by setting the detail level to -8 and aperture to +30 the camera produced pictures with a nice crispness without looking artificially enhanced.

PMW-200 Default Settings.

There are many other adjustments that can be made in the picture profiles including knee settings, black gamma, a multi matrix or colour correction matrix and skin tone detail settings. I urge anyone that uses one of these camera to learn about what the various settings do as the picture profiles are a great way to tailor the camera to meet your exact needs.

PMW-200 Custom Picture Profile.

The PMW-200’s main menu structure is again very similar to the EX cameras. It is logically laid out and easy to navigate. There sections for the camera settings, audio settings, outputs, monitoring, timecode and general system settings. In the camera menu you’ll find settings for the more advanced modes that the camera has, which include Interval Record for time-lapse, Frame Record for animation and stop frame filming, Picture Cache and S&Q (slow and quick) motion. The Picture Cache mode is particularly useful for capturing unexpected events. In this mode the camera continuously buffers the video from the camera sensors into an internal memory. When you press the record button recording stars immediately but in addition the (up to) 15 seconds prior to pressing the record button are also recorded. I use this mode a lot when I’m shooting thunderstorms and lightning as I can simply point the camera at the storm, wait for the lightning to strike, then press the record button.

Rear view of Sony PMW-200.

The interval record mode allows you to shoot great time-lapse sequences with ease. For sunsets and sunrises and other scenes where you may have a big exposure change you can also take advantage of the cameras clever TLCS (total level Control System) function.  This is a sophisticated kind of auto exposure mode. I’m not normally a fan of auto exposure but TLCS allows you to set limits for the amount of automatic gain, iris, shutter speed and the response time. By limiting the maximum gain to around +9 db you can be sure that your pictures won’t become too grainy as the sun sets.  With TLCS the camera will still be able to correctly expose while the sun is still up thanks to the auto shutter and auto iris. TLCS is a very useful tool in the PMW-200’s arsenal.

Menu and playback controls on the PMW-200’s handle.

With S&Q motion you can shoot at up to 50/60 frames per second (depending on region settings) at 720p for slow motion and effects shots. You can choose any speed you want from 1 fps up to the maximum in 1 frame increments. Below 25/30 fps you can use the full camera resolution of 1920×1080.

Talking of frame rates, the PMW-200 can be switched between both PAL and NTSC regions. As a result it can shoot at a multitude of frame rates at full 1920 x 1080 including 23.98p, 25p, 29.97p, 50i, 60i and at 720p it can record at 50p and 60p.

Recording Media Choices: The PMW-200 is designed to record on to SxS cards but you can also use SD cards, memory sticks and Sony’s new XQD cards via adapters. When you use the camera in any of the 4:2:2 modes the camera must format the cards using the same UDF format as the full size XDCAM optical disc cameras and XDCAM HD422 cameras. In UDF mode you can only use SxS cards. If you want to use SD cards or memory sticks then you have to use FAT formatting and this restricts you to the same 35 Mbit/s 4:2:0 recording modes as an EX camera. I strongly recommend that you use SxS cards. They are incredibly reliable and very fast. They are designed for video applications and in 5 years of using them I’ve never suffered a failure despite freezing them in ice and washing them in the washing machine (neither of which I actually recommend). You can offload media from your cards by connecting the camera to a PC using USB or by using the Sony SBAC-US10  USB card reader. If your computer has an express card slot you can insert the cards directly into the computer or if it has a Thunderbolt port you can use the Sonnet Echo Express card reader for incredibly fast transfers around 6x real time for 50 Mbit/s 4:2:2 material, even faster for 35 Mbit/s.

XLR connectors for audio in on the PMW-200

Audio is as you would expect from any professional handheld camcorder except this one can record 4 channels of audio at the same time. There is a built in stereo microphone at the front of the cameras handle as well as two XLR connectors for external microphones or line level inputs. The XLR’s have phantom power if you need it. It is possible to record the internal microphones with automatic gain to audio channels 3 and 4 while the external mic inputs are recorded to 1 and 2. On the side of the camera there are controls for selecting the internal or external audio along with switches to move between automatic audio gain or manual gain plus a pair of knobs to set the manual gain level.

Audio controls on PMW200

A 3.5mm headphone socket is provided for monitoring, the volume for which can be adjusted using up and down buttons on the camera handle. If your using a single external audio source such as a mono microphone you can map this to both audio channels in the cameras audio menu. Above the XLR audio connectors there is a microphone holder. This is attached to the camera body via a rubber mount and looks to be a lot more robust that the mic holder on the EX cameras that did have a tendency to break off if roughly treated.

New LCD design with ultra wide viewing angle.

Great New LCD! The PMW-200 has both a 3.5” LCD screen and a small electronic viewfinder. The 3.5” LCD flips up and out from the top of the camera handle. This means that it can easily be seen from the left side of the camera as well as above and below the camera. In addition it can be twisted right around and laid back flat against the top of the handle or flipped up vertically. In the vertical position it can be viewed from the right side of the camera.

For self shooters and one man bands this is really useful as it means you can conduct an interview from either side of the camera and still check your framing. When the screen is folded flat against the handle it keeps the camera compact and the LCD is less likely to be damaged when it’s not sticking out from the side of the camera.

The LCD screen reversed and folded flat.

The screen itself is bright and clear and has a remarkably wide viewing angle.  Like many LCD’s the LCD on the original EX cameras only has a useable viewing angle of about 15 degrees. If you are not looking square on at most conventional LCD’s the contrast and blacks are no longer accurate and this can lead to exposure errors. The new LCD on the PMW-200 has a viewing angle in excess of 120 degrees, you can see it from almost any angle. The contrast and brightness remains near constant even when viewed at very acute angles. This makes it much easier to use and should help reduce exposure errors. The new screen is also slightly higher resolution. One small criticism here is that on the pre-production camera that I had for review the screen was quite glossy. I hope the production screens have a less glossy finish as I prefer a matt finish.

The electronic viewfinder on the back of the camera handle is the same as the one on the EX1R.  I’ve seen worse, but I have also seen better. It’s adequate.

Expanded Focus button on hand grip.

If you make use of the cameras coloured peaking or expanded focus assistance you can focus with it, but blink rapidly and you get a rainbow effect due to the way the red green and blue pixels are displayed one after another. The expanded focus function works while recording and is easily selected thanks to a button on the hand grip just by the zoom rocker.

There are buttons on the side of the camera body for zebras and focus so these can be selected quickly and easily if you need them.

Rear BNC HDSDi, HDMI and other connectors.

If you want to connect an external monitor or viewfinder there is a comprehensive range of input and output connections on the rear of the camera. You have HDMI and HDSDi. Both can be used at the same time should you need to. You can down convert from HD to SD while you shoot if you need to provide a standard definition external feed. If you don’t need to connect an external device you can turn off the HDMI and HDSDi outputs to save battery power. If your shooting at 23.98p (24p) you can choose whether your output is 59.94i with pull down or straight 23.98p.

 

Just below the full size HDSDi BNC are two additional BNC connectors. The top one is for timecode and can be set to timecode in or timecode out. This is extremely useful on multi-camera shoots for synchronising the timecode on multiple cameras. Below that is a connector for Genlock In or Video Out, again an extremely useful feature that makes the PMW-200 useable in studio, multi-camera and 3D applications. Next to the BNC connectors is a USB port for off loading footage from media in the camera.  There’s an i-link connector (firewire) and AV out connector that provides stereo line level audio and composite video out.

Playback controls on the handle.

Playback Mode. One frustration with the EX cameras is the need to switch the camera between specific recording and playback modes. To go from camera mode to playback mode takes about 8 seconds, that’s not really that long, but if you are playing back a clip and then suddenly need to shoot something, that 8 seconds feels like forever. There is no separate playback mode with the PMW-200. You simply press the thumbnail button or play button on the handle to view your clip thumbnails or play back the last clip. If you need to record again in a hurry you simply press either of the record buttons (one on the top of the handle, one on the hand grip) and within a second the camera will start recording. This is a big improvement and very welcome. The camera switches on faster than an EX1 and there is even a fast start mode where you press the record button while turning the camera on to power up very quickly and go straight into record. Another feature coming through a firmware update and the addition of a CBK-WA01 wifi dongle will be the ability to control some of the cameras functions using an iOS or Android device. I have limited information on this but you should be able to control focus, iris, white balance and rec start/stop and maybe some other functions as well. In addition the camera should support data logging and metadata management using XM-Pilot over WiFi (CBK-WA01 required).

The battery compartment with recessed power connector.

Power Options: The PMW-200 is a 12v camera. It uses the same BP-U30 and BP-U60 batteries as the EX1/EX3, PMW-100 and PMW-F3 cameras. It can also be powered by an external 12v power supply. The connector for external power is tucked away inside the battery compartment so you won’t be able to use any of the 3rd party batteries that use a separate cable to connect the power. It also means that you can’t run the camera off an external power supply while you hot swap the batteries. I think it’s a shame that Sony have done this.

Power consumption is higher and the camera does get quite warm compared to an EX1. This I suspect is largely down to the extra processing power packed into the camera, not just for the 50Mbit/s 4:2:2 encoding but also for the improved image processing. I still got around 3 hours out of a well used BPU-60. To get rid of the extra heat the camera is covered in cooling vents. As handheld cameras like this get used outside in all kinds of weather I was a little concerned about water ingress.

Alister shooting an airshow with the PMW200

However after shooting for a weekend at the Royal International Air Tattoo in showery rain I didn’t experience any problems. The engineers at Sony tell me that there are shields inside the camera to prevent any moisture that might get in from doing any damage. As always when shooting in the rain you should really use a rain cover with any camera anyway, but we do all get caught out in a shower from time to time.

422 compared to 420 both shot with the PMW-200. Click on the image to enlarge.

Conclusions: Well I got to use the PMW-200 in Singapore in bright sunshine, high heat and humidity. I also shot night time cityscapes with it. It shrugged off the heat and performed flawlessly. The low light footage looks really good. Then I spent a week with it in the UK, putting it through its paces on a couple of paying shoots for clients. One a corporate video, the other shoot involving running around on the apron of a military airbase filming aircraft preparing for an airshow. In addition I used it to shoot the video review that accompanies this written review. At first I just saw the PMW-200 as an EX1R with the addition of 50 Mbit/s 4:2:2, which in itself is a nice improvement. But then when I started to find some of the subtle improvements like the better zoom servo, the wide LCD viewing angle, reduced picture noise and improved handling the PMW-200 really started to grow on me. It’s not significantly different from the EX1R and that’s good. The EX1R is a great camera and the PMW-200 builds on the strengths of the EX series. I believe this camera will do extremely well. It’s just what’s needed for many broadcast productions. Best in class low light performance. Beautiful full resolution images, easy to use and an industry proven workflow that meets broadcast standards.

Disclosure. I am a Sony ICE (Independent Certified Expert). I am NOT an employee of Sony, but I do work with Sony helping with training, education and events. I was paid a fee by Sony to cover the costs of shooting and editing the video and the time taken to write this review. I was not asked to write a favourable review and the reviews (seen here and on the Sony web site) were not modified, edited or changed by Sony from my original submission other than a correction to the EBU R118 specifications (added note about 1/3″ dispensation). The views expressed here are my own and are based on my experience using a pre-production camera for 2 days in Singapore and 10 days in the UK.

Bye bye reverse focus Nikon Mount Lenses…. Hello Samyang!

I’ve been using Nikon lenses on my F3’s since I first purchased them. I’ve been getting very good results and optically I have been perfectly happy with the lenses I have. I chose Nikon simply because they have ether manual iris rings or the small lever on the rear of the lens that allows adapters like the MTF adapters to control the iris manually. For bigger budget shoots and commercials I hire in PL mount lenses to suit the job. When I got the FS700 my plan was to continue to use the Nikon mount lenses. But I did also get a metabones adapter for the FS700 so I could use the few Canon lenses that I have for my DSLR’s. That’s when the problems started.

Every now and then it’s nice to have auto iris, even if all you use is the one push auto button to quickly set the exposure. With a Sony E mount lens or Canon lens on the FS700 I get this functionality and it’s nice to have. I don’t use it a lot but for some jobs it is nice. So suddenly I found myself alternating between Nikon and Canon mount lenses and thats a nightmare because most Nikon lenses focus in the opposite direction to every other lens I know. After spending most of my life turning a focus ring anti-clockwise for infinity it becomes instinctive. When I started using Nikon lenses I had to re learn how to focus, now I’m using Canon mount lenses again I’m going back to instinct again and it’s very confusing. You can use a follow focus with reversible gears to get around the problem, but it’s still not ideal.

Anyway, I’ve decided enough is enough and I’m selling off any lens that focusses back to front (clockwise for infinity, nikon style) and replacing them with lenses that focus the correct way.

This isn’t as simple as switching to Canon as I still need to be able to use the lenses on my PMW-F3, so I still need a manual iris ring. Most Sigma lenses focus in the correct direction, even Nikon fit ones. Some Sigma lenses still have manual iris rings, so my general purpose zoom for the F3 is now a Nikon fit Sigma 24-70mm EX-DG Macro lens which does have an iris ring and focusses the right way. Next I swapped out my reverse focussing Nikon fit Samyang 14mm f2.8 for a Canon fit Samyang 14mm. These lenses are really good value for the money and they do have manual iris rings. I also now have the Samyang 35mm f1.4 and I really like it a lot. I have my eyes on the 24mm and 85mm Samyang’s as well to complete my kit. In the mean time I also have some Sigma 20mm f1.8’s and again even though these are Nikon fit they do focus the correct way and do have manual iris rings.

If anyone is looking for some Nikon fit lenses I have a number for sale including a couple of Tokina 28-70mm f2.6 MK1 and Mk2 AT-X pro’s and a 20-30mm AT-X pro (love those lenses as they don’t telescope), and a couple of  50mm Nikkor AI-s f1.8’s.

Contrast and Resolution, intricately linked.

This is one of those topics that keeps coming back around time and time again. The link between contrast and resolution. So I thought I would take a few minutes to create some simple illustrations to demonstrate the point.

Best Contrast.

This first image represents a nice high contrast picture. The white background and dark lines have high contrast and as a result you can “see” resolution a long way to the right of the image as indicated by the arrow.

Lower contrast.

Now look at what happens as you slowly reduce the contrast in the image. As the contrast reduces the amount of resolution that you can see reduces. Keep reducing the contrast and the resolution continues to decrease.

Low Contrast.

Eventually if you keep reducing the contrast enough you end up with no resolution as you can no longer differentiate between light and dark.

Now look at what happens when you reduce the resolution by blurring the image, the equivalent of using a less “sharp” lower resolution lens for example. What happens to the black lines? Well the become less dark and start to look grey, the contrast is reducing.

Reduced resolution.

Hopefully these simple images show that contrast and resolution are intrinsically linked. You can’t have one without the other. So when choosing lenses in particular you need to look at not just resolution but also contrast. Contrast in a lens is affected by many things including flare where brighter parts of the scene bleed into darker parts. Flare also comes from light sources that may not be in your shot but the light is still entering the lens, bouncing around inside and reducing contrast as a result. These things often don’t show up if you use just a simple resolution chart. A good lens hood or matte box with flags can be a big help reduce stray light and flare, so in fact a matte box could actually make your pictures sharper. They are not just for pimping up your rig, they really can improve the quality of your images.

The measurement for resolution and contrast is called the MTF or modulation transfer function. This is normally used  to measure lens performance and the ability of a lens to pass the light from a scene or test chart to the film or sensor. It takes into account both resolution and contrast so tells you a lot about the lens or imaging systems performance and is normally presented as a graph of contrast levels over a scale of ever increasing resolution.

Picture Profiles to match PMW-F3 and NEX-FS700

IMPORTANT PLEASE ENSURE YOU USE THE REVISED SETTINGS UPDATED ON 24th  JULY.

After my recent side by side look at the F3 and FS700 and seeing how different the two cameras look, I decided to try to match them a bit better. There will be many shoots where I will use them both together so getting them to look the same is important. I thought this would be a relatively straight forward task, simply dial in the FS700 to match the F3.

Well it wasn’t simple and it ended up taking me several hours to get to the point where I couldn’t get them any closer. The main issues are that the F3, like most of the XDCAM cameras has a yellow colour cast that’s hard to completely remove and the FS700 has quite a blue image and only very limited matrix controls. Initially I started to try to match the FS700 to a standard F3. While I could get the FS700 closer to the F3, I just couldn’t get a near match let alone a complete match. So back to the drawing board.

For my second attempt I decided first to work on getting rid of the yellow/orange cast to the F3 pictures by adjusting the F3’s matrix, at the same time creating a neutral look picture profile with good dynamic range, but one that could be used without grading. This took some extensive matrix tweaks. You will find the full details of my new “STD-REAL” picture profile in the forum by clicking here.

So once I had a neutral starting point on the F3 I then turned to the FS700 which I think is very blue. The matrix settings on the FS700 are quite limited so I wasn’t able to get an exact match to the F3, however the setting I came up with get them close enough for most jobs, it’s not perfect but it will do. I’m quite happy with my new FS700 settings and I think with this profile it produces a very nice image. You can find the full profile settings in the forum by clicking here. Remember you need to use the matching F3 profile in the F3 for the best match. If you want the maximum dynamic range then instead of Cinegamma 1 you should use Cinegamma 4 with the black gamma set to zero. My STD REAL profile for the FS700 is closer to a standard F3 than the default FS700 settings.

NEX-FS700 Pixel Count and Sensor Size.

There is something a little curious about the specs for the sensor in the FS700:

Imager Exmor Super35 CMOS sensor
Number of pixels Total pixels approx. 11.6M
Effective pixels in movie shooting (16:9) approx. 8.3M
Effective pixels in still picture shooting (16:9) approx. 8.4M (3:2) approx. 7.1M

Why create a sensor with 11.6 million pixels and then use only 8.3M? It is normal to have some extra pixels that are used for setting black levels etc, but this is a massive difference between the number of actual pixels on the sensor and the number that are used to create the pictures. Where are all the un-used pixels? Given that this is a Super 35mm sensor, the active area used for video is APS-C ish sized, so it’s quite a big sensor already. What would you put a near full frame 35mm  11.6 MP sensor in these days? That’s a low pixel count for a modern large sensor DSLR or stills camera, even the compact NEX7 stills camera has 24MP. If (and this is just random speculation) the FS700 is taking an 8.3MP window out of the middle of the sensor, that makes it a pretty big chip. Another thought is that the FS700 does read the full height and width of the sensor but then uses some pixel skipping only actually reading 8.3MP, but why do that? In stills mode the camera only uses 8.4MP yet with so many extra pixels you could get higher resolution stills. So… why 11.6 MP and what else was this sensor designed for?

PMW-F3 and FS700 comparisons. Free clips to download.

OK, not really very scientific, but I’m busy on some paying projects at the moment and the weather is very changeable so I only had a short window to do this. I’m still exploring the image quality of the FS700. It is very good, of that there is no doubt, but my benchmark right now is the F3. So I just did a very simple side by side test to look at noise and dynamic range. The scene has about an 11 to 12 stop range if you include the specular highlights and reflections off the silver car bonnet and the brightest clouds. If you take the S-Log clip as the reference the clouds are at about +5.5 stops over nominal middle grey and the darkest part of the image, the black stand holding the chart, is about 6 stops under. I wasn’t looking to actually measure anything here, just get a feel for the differences between the cameras.

The cameras were set to 800 ISO for all the clips, so the FS700 had +6db gain applied for all clips while the F3 had +6db applied for the Cinegamma and standard gamma clips and no additional gain in S-Log. Frame rate was 25fps with a 180 degree – 1/50th shutter. The HDSDi out from the cameras was recorded using ProRes 4:2:2 on an Atomos Samurai.

For the S-Log sample I exposed using the DSC Labs S-Log exposure reference chart (which you can see in all the frames) by placing the cameras centre spot meter over the middle grey and aiming for 38%, however my waveform monitors are telling me the mid grey exposure was actually 35% so I’m about a 1/4 stop under (and need to check why I didn’t get 38%). For the Cinegamma 4 tests I used the histogram to keep peak white at about 95% with similar mid range exposure. In fact the mid grey patch on the DSC S-Log chart is around 38-40% on both cameras which is just a touch low for the cinegammas (I normally aim for 42%-45% with cinegammas). Exposure for the standard 709 gamma was established with the histograms trying to get a reasonable balance between clipped highlights and a reasonable mid range. The result is that the standard gamma shots are under exposed by around 1.5 stops, mid grey is only 33% on the F3 and 30% on the FS700. I would normally aim to put middle grey around 45-48% for Sony’s REC-709 compliant gammas. If this shot included a person or face then I would have been forced to either over expose the sky still further or use some fill lighting or a reflector to bring up the foreground. This is typical of the dilemma you get when trying to expose a scene with a greater range than the camera can deal with, do you overexpose the sky to preserve the mid range or underexpose the mid range to keep the sky. Either way something has to suffer.

While not very scientific I think the clips highlight some interesting differences between the two cameras. The most striking difference is the colour. Both cameras were set to preset white at 5600k with their standard colour matrices. White does appear to be white, but the F3 when not in S-Log is clearly more saturated and has a touch more red and a lot less blue that the FS700, so clearly I’m going to have to do some work on the matrix to get these two cameras to match better. Next thing to note is that the Cinegamma curves are quite different. The FS700 curve has more gain in the mid range which results in brighter upper mid range compared to the F3. The dynamic ranges are very similar, I could have exposed the FS700 about a stop lower to gain a little more highlight room, but this would have resulted in some quite dark mid tones and a little loss of shadow detail. In both cases the cinegammas give a quite appreciable increase in dynamic range over REC-709. I would guess at about a 1.5 to 2 stop improvement in dynamic range gained from using Cinegamma 4 over the Sony REC-709 compliant curves + knee. The S-Log clip from the F3 shows the marked increase in dynamic range that you get when using log. The brightest clouds are about 5.5 stops over middle grey with the peak recording level reaching about 89% which means there are around a further 1.5 stops of unused headroom available.

The FS700 is a little noisier than the F3, no surprises here. It’s not hugely noisier and the noise levels at 400 and 800 ISO are perfectly reasonable for a broadcast production. At a push I would use 1600 (+12db) if I had to, but I think for me at least the comfort zone is 400 – 800 ISO (0db and +6db).

The FS700 images appear to lack a little of the crispness of the F3. This may just be because the standard F3 is a little over sharpened (in my opinion). The FS700 pictures look more like the S-Log F3 which has no added image sharpening and in fact in some respects the Cinegamma FS700 looks more like the S-Log F3 than the Cinegamma 4 F3. From what I’ve seen you probably could figure out a very flat log type picture profile for the FS700, but I’m not sure that this would bring any significant benefit over Cinegamma 4. The extra noise in the shadows that you would get if you bring up the low end with some black stretch (black gamma) would likely limit the usefulness of any slight extra latitude gained. However you look at it the FS700 does appear to be able to cope with around 12 stops (maybe a little more) just by using Cinegamma 4, which is about as much as you want with a 8 bit camera anyway.

Interestingly I spotted some moire and aliasing from both cameras. The dreaded roof tiles of the houses opposite (a tough test for many cameras) strike again and the F3 is showing a little coloured moire across the roof tops while the FS700 is showing some aliasing on the grill of the silver car. I’m not concerned by either. Yes it would be nice if it wasn’t there, but I’ve shot hundreds of hours with my F3 and it’s very rare to find any shots that are unusable or problematic due to aliasing.

If you want to download the actual footage please use the link below. The file contains a single clip made up of about 5 seconds each of the FS700 with Cinegamma 4 and standard settings, the F3 with cinegamma 4, standard settings and S-log. The clip is a direct copy of the original ProRes 422 files recorded from the HDSDi outputs of the cameras. 10 bit for the F3 and 8 bit for the FS700. The file size is 150 MB and 10 seconds long in total. Lets hope the file sharing service works as advertised!

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 Here are some jpeg frame grabs. Remember you can click on each image to see it larger and once you’ve clicked though to the larger image there should be a link just above it for the full size 1920×1080 original.

PMW-F3 S-Log
PMW-F3 Cinegamma 4
NEX FS700 Cinegamma 4
PMW F3 Standard settings
NEX FS700 standard settings.