Chris Hurd |
September 9th, 2007 12:21 PM |
Hi David, do you mean that the lens barrel itself physically moves when changing focus? I know that some zoom lenses which breathe will do this and others won't... depending on the lens, the slight change in focal length brought about when changing the focal plane may or may not result in a physical movement of the lens barrel.
If it does, it shouldn't affect your matte box since the box itself is mounted on rails. If enough clearance is left between the outer diameter of the lens barrel and the inner diameter of the matte box, and the connection between the box ring and the lens ring is made by a flexible bellows or a cloth shroud, then a slight movement of the lens barrel shouldn't affect the matte box.
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