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Lens Shading?


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#1 anthony derose

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Posted 04 June 2010 - 09:09 PM

What exactly is lens shading with higher end ENG cameras and things like the Varicam? When I first heard it I was thinking that it meant setting up a lenser or putting a french flag on the box. Though doing some research I guess it means to figure out aberrations in a lens like a digiprime or something. I really don't know can someone explain.

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#2 Phil Rhodes

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Posted 05 June 2010 - 07:13 AM

It's essentially vignetting correction; it puts an electronic correction in the camera to flatten out any tendency the lens has to go dark in the corners of frame. With decent lenses, it's often not the end of the world if it isn't right, and even if you do get it right, most broadcast lenses are zooms and it will only be exactly right at one point in the zoom range.


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#3 Rob Vogt

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Posted 05 June 2010 - 09:19 AM

I always understood it as being a way to match lenses like a set of digiprimes to the F900 or varicam. Every time a set of 2/3" glass went out it always went through a shading- even higher end cine-zooms and digiprimes.
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