Any way to predict vignetting in a lens?

Discussion in 'Adapted Lenses' started by Jen Watson, May 29, 2013.

  1. Jen Watson

    Jen Watson New to TalkEmount

    Apr 30, 2013
    I have a decent set of regular EF-S lenses to use on my NEX MILC, but I want to play around with some toy lenses. I'm particularly interested in C-mounts, because of the size and portability.

    Most of the 35mm c-mounts seem to produce soft vignetting/distortion, but nothing terrible. Anything else, however, is a toss-up. I've seen uncropped images of 50mm c-mounts on an APS-C sensor without significant vignetting--but I've seen just as many where the lens itself obscures most of the image (like the below image).


    Is there anything I can look for that would predict whether or not a lens would produce that sort of intense vignetting/obscuring? specifically, would a lens with a throat size of ~42mm automatically produce intense vignetting on a NEX?
  2. Bimjo

    Bimjo Super Moderator Subscribing Member

    Oct 28, 2011
    Washington State
    I'm not sure there's a reliable way to judge vignette potential. Even within the NEX bodies it varies. My 5N vignettes/color shifts with UWA rangefinder lenses, many of the do not.