Asim
Well-known
If one were to never use a lens cap on an M mount 21mm f/4 Color Skopar and instead replace it with a UV filter or 81A filter screwed in, would there be any vignetting at wide apertures?
Jockos
Well-known
I've not noticed any increase of vignetting with the filter screwed on. You should know tough, that this lens has severe vignetting wide open.
Thomas-Paris
Member
I see minimal to no vignetting on my copy, wide open, filter or no. Which is not surprising, f/4 not exactly being very wide open. Again, in good light, this lens has NO vignetting at f/4.
sebastel
coarse art umbrascriptor
looks like you talk of different concepts by using the same word.
vignetting as in the picture getting darker to the corners - yes, the lens shows, especially wide open.
vinetting as in cutting off the corner - no, even with a filter on, the full 24x36 format will be exposed.
vignetting as in the picture getting darker to the corners - yes, the lens shows, especially wide open.
vinetting as in cutting off the corner - no, even with a filter on, the full 24x36 format will be exposed.
Thomas-Paris
Member
Yes, it shows a very little bit of vignetting. If you're talking about digital, that's another matter, but my negatives show very little. Here are two corner crops, the first, of sky through tree branches, is the upper-left quarter, the second, of a table top below a beer glass, is the bottom-left quarter. These go right up to the edge of the negative, and were both shot at f/4; the first with a light yellow filter, the second with no filter.
Vignetting, I see very little of; flare is another matter.
Attachments
Jockos
Well-known
My 9000F doesn't scan all that well, but I'd say it's more than 1 stop darker.
Sorry for huge picture
Sorry for huge picture
Thomas-Paris
Member
I find it extremely disrespectful of others reading the forum when people post huge images like that. It makes the page unusable. Take a minute and resize the damn photo.
From that one image I can't see if it's really the lens vignetting or the window; if you look, the window darkens towards both edges, one of which is on the left of the frame, and one of which is in the center.
If somehow the window should have been on a gradation from dark on the right side to light on the left, then that would be vignetting from the lens. But as you see from my negs, I don't see that on my (LTM) copy. If yours does vignette significantly, I would say there is serious QC variation, and I was lucky with my copy.
From that one image I can't see if it's really the lens vignetting or the window; if you look, the window darkens towards both edges, one of which is on the left of the frame, and one of which is in the center.
If somehow the window should have been on a gradation from dark on the right side to light on the left, then that would be vignetting from the lens. But as you see from my negs, I don't see that on my (LTM) copy. If yours does vignette significantly, I would say there is serious QC variation, and I was lucky with my copy.