Re: Fujinon-SF 250 mm lens
This lens should have diffusion disks, one with a yellow dot and the other with a red dot, to adjust the softening or diffusion of the image. The colored aperture scales are used when the appropriate disk is in place.
Re: Fujinon-SF 250 mm lens
I see. Thanks Eric. I seem to have only gotten the disk with the yellow dot on it.
Re: Fujinon-SF 250 mm lens
If you want to get a red aperture plate, Diane, contact Jim Andreki (probably mis-spelled) at Midwest in Columbus OH. He had some earlier in the year (or maybe it was last year) for sale at about $35 each.
Re: Fujinon-SF 250 mm lens
Here is a scan of the original English instructions which came with the Fujinon-SF, explaining how to use the disks.
Re: Fujinon-SF 250 mm lens
Re: Fujinon-SF 250 mm lens
Jason,
In those instructions, did it say anything about mounting the lens? It seems to have a rather large spacer that screws into the rear of the shutter in addition to the retaining ring. Should this spacer be mounted on the front or the rear of the lens board?
Re: Fujinon-SF 250 mm lens
I don't remember having both a spacer and retainer ring when I mounted my 250SF. I mounted it with just the retainer ring on a Calumet/Cambo board. The screw that protrudes from the back of the shutter is to keep the lens from rotating. You can either remove it or notch the board so the screw fits into the notch and the shutter sits flat on the board. There have been numerous threads on this issue both here and on APUG. The overall consensus is that it is not needed and can be removed. I notched mine only because I couldn't get it out.
Brian
Re: Fujinon-SF 250 mm lens
It is necessary for some small lensboards (e.g., Linhof Technika) to use the spacer in front of the board to make it possible to mount the board with the large Copal 3 shutter onto the camera -- spacing the shutter forward gives a necessary clearance. With the spacer in front of the board, the projecting screw won't reach the lensboard and there is no need to remove it.
Re: Fujinon-SF 250 mm lens
As Michael mentions, the spacer ring can goe either in front or back of the lensboard, depending on if you need it or not. It is not mentioned in the instructions because it is part of the shutter not the lens.