A77 - Film Back measurements

Started Jul 24, 2012 | Discussions thread
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future spooker
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A77 - Film Back measurements
Jul 24, 2012

I have a good amount of footage shot on the A77 and need to do a 3D camera track using PFTrack.

http://www.thepixelfarm.co.uk/product.php?productId=PFTrack

To get a good solve, having the physical dimensions of the active record area is needed. For instance, on the FS100, it's 23.6mm x 13.3mm. The Red Epic at full 5k is 27.648mm x 14.58mm. In the video / post world, it's known as "film back". That in combination with the focal length will result in an accurate solve.

The problem I'm running in to is getting the physically measured active record area when in video mode since the A77 crops and changes aspect ratio while shooting video.

Does anyone know these measurements. Any help would be greatly appreciated.

Thanks.

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