Tag Archives: lightmeter

PXW-FX9 Exposure Accuracy – Can I use A Light Meter?

This came up during a Facebook discussion. Can you use a light meter with the FX9 and will the exposure be correct?

When I first met the FX9 at Sony’s Pinewood Studios facility we tested and checked all sorts of different aspects of the cameras performance against various light meters and test charts. I found that the camera matched what we expected perfectly well.

But just to be sure I have just tested my own example against my trusty Sekonic light meter and once again I am happy to say that everything seems to match as expected.

In this simple setup I used a couple of different charts with middle grey and 90% white – I do find that there is some variation between charts in how reflective the 90% and 18% reflectivity areas are. So I’ve used a couple here and my main reference is the large DSC Labs white and middle grey chart.

I used the dimmers on my lights so that my metered exposure reading for 24fps 1/48th shutter came to exactly f5.6. Then I set the lens to f5.6 (Sony 24-70mm GMaster).

The result is pretty much as close to a perfect exposure as one can expect. So don’t be afraid to use a light meter with the FX9.

Exposed via the light meter, screen grab from Catalyst Browse.

 

And the levels as measured in DaVinci Resolve. All looks good and where you would expect S-Log3 to be.