X-ZGZ
Imported Account
Mar 12, 2001, 3:32 PM
Post #4 of 4
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That is true that the lens, filter or shade can cause vignetting. In your example where your camera lens is 37mm and the VX-1000 fisheye is 52mm, the fisheye diameter is LARGER than the lens of the camera you are placing it on, therefore there should be NO vignetting. IF the case was reversed, then there would be severe vignetting since the fisheye would be so much smaller in diameter than the lens (as is the case with STEP-UP rings)
: Vignetting can be caused by a couple of things. Sometimes when a filter or a lens shade is mounted on the lens (especially a wide angle lens) it may protrude far enough ahead and into the field of view of the lens and cause the darkening at the outer edges of the image that we call vegnetting.
: Also, some wide angle lenses have a optical problem in that they cause their own vegnetting because of what is know as light fall off at the outer edges of the image.
: John Stockwell
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: : I was wondering what exactly causes vignetting on fisheye and some wide angle lenses? So when a Century Optics fisheye for the VX1000 is placed on a camcorder with a filter diameter of 37mm, is it going to cause a great deal or very little vignetting?
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