doug_meek1 Posted May 15, 2002 Share Posted May 15, 2002 Hi Everyone. <p> I've seen several posts in the past regarding how to check for vignetting prior to shooting. All of the solutions required a GG with cut corners. My question is, how do you check for vignetting if your GG doesn't have cut corners ? I occasionally get back a chrome with slight vignetting due to excessive movement, and yet I was unable to detect it even after stopping down to the working aperture. My Toyo 45AII comes with a very decent and bright GG so I would think that I should be able to see the vignetting when stopped down, but not so. Any suggestions ? As always, thanks in advance for your help. Link to comment Share on other sites More sharing options...
dhananjay_n Posted May 15, 2002 Share Posted May 15, 2002 If the back is removeable, remove the back and sight through the corners. If you don't mind doing so, take the ground glass to a glass cutting shop and have them cut the corners off for you, or use a glass cuttere to do this yourself. Alternatively, try applying varnish to the corners to make them clear and see through. Good luck, DJ. Link to comment Share on other sites More sharing options...
mateo_leyba Posted May 15, 2002 Share Posted May 15, 2002 I don't ever have the need to do this with my setup, but I beleive looking through the lens (at the desired stop) from the front of the camera back at the GG corners will do the same thing as looking through cut corners, it's just the reverse. Link to comment Share on other sites More sharing options...
erik_ryberg Posted May 15, 2002 Share Posted May 15, 2002 Doug, <p> On one of my 8x10 lenses I kept getting vignetting and could neverfigure out why, because I was judiciously looking through the (cut)ground glass corners before every shot. Then I figured it out: I wasadding my filter (usually red or yellow, and hard to focus with) aftercomposing and checking for vignetting, and the filter was vignetting. <p> This probably isn't what is happening to you, but I thought I'd bringit up in case it rings a bell. Link to comment Share on other sites More sharing options...
per_volquartz1 Posted May 15, 2002 Share Posted May 15, 2002 The sure way to check for vignetting is to set the lens at the shooting aperture, and look through the lens FROM THE FRONT. If you can see all corners of the ground glass area you will be fine. This works too when using an adjustable lens shade, trying to set it at its max... Link to comment Share on other sites More sharing options...
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