There are at least two versions of the Ilex 5 Universal shutter: One is silver with the aperture and shutter speed ring surrounding the front element and visible when looking at it from the side or straight on. My 610mm APO-Nikkor is mounted in this Version. The other is black and where the aperture and shutter speed ring appears on the former a nice looking chrome ring appears instead that rotates and has a pointer to indicate the shutter speed which is hidden and visible only from the side. The aperture ring is located on the side of the shutter. My 760mm APO-Nikkor is mounted in it.
When I first received the 760 I removed it from the wooden board that it was mounted on and rushed with it to the PO before it closed to have Grimes mount the shutter and flange on a Toyo board thinking that I could mount the 760 elements in the 610's shutter. But I was surprised to find that even though both lens used 95mm filters the 760 required a wider shutter opening to thread into and the mounting flange was also larger – coming to within 6mm from the edge of the lens board. Does this mean that the 760 can only be mounted in the black Ilex 5 Universal?
Thomas
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