Finally acquired a central ND filter for my 65mm f/4 Nikkor-SW. So yesterday to test it out, shot one sheet of 8x10 film with it on the lens at f/5.6, and another with it on the lens at f/45. Used 8x10 film cause I wanted to see the coverage of the lens. When comparing the prints made with the 2 negatives, I swear that there is a difference in the overall effect of the central ND filter. Are central ND filter made and optimized to be used at certain apertures? Or am I seeing something that is not really there?
Bookmarks