I would imagine that closing the shutter out front of the lens would cause vignetting; there are purpose made tools for that from years back in various shapes, such as Hi tech filter holders but they are so old I cant find any on the internet. As Dan implies the shutter f stop will not alter DOF as expected.
Last edited by cowanw; 4-Jul-2019 at 06:33.
If I understand your lens set up correctly: after you close your shutter, some light can still enter your lens, thus causing weird effects. Only when you push in your darkslide no more light can hit the paper.
best,
Cor
Ah! So what looks like a gap is a gap. Unwise.
Tony, you need to minimize the distance between the lens and the shutter.
Bookmarks