>On Tue, 22 Oct 1996 23:51:03 GMT, scary@iadfw.net (Steve Cary) wrote:

>>I bought a Soligor fish-eye lens that you screw onto your existing
>>lens like you would a filter. It is about 3 inches tall, and has a
>>cuople of dials on it. That is where I don't know for sure what to do
>>to it and my existing lens. It has one dial close to the bottom end
>>that has lens lenghts marked on it - 30 40 50 55 70 85, etc. When you
>>turn that one to, say, 55, you have another set of numbers in a window
>>above it - 3.5 all the way to 90. At the focal length of 55 only 5.6
>>to 32 show up. This changes according to the focal length number
>>chosen. There is another part that twists the whole affair to match up
>>the F stop numbers to a red dot at the top.
>>
>>Here is the question. What do I set all of these numbers on, and what
>>do I set my camera/lens on? I think you would set the focal lenth
>>number according to your lens' focal length. What do you do with the F
>>stop numbers, though? Set your lens to one of those numbers? Or set
>>your lens wide open and set the camera to manual and use the F stop
>>number on the fish-eye?

Hmmm, my memory of that interesting fisheye adapter makes me think
that some other advice given is wrong... If you set anything but
maximum aperture on the camera lens, you will reduce the coverage
of the fisheye (try it with the DOF preview engaged...). Set the
camera lens FL on the scale, which then gives you the range of
available f-stops for the combination. Use the aperture ring on
the fisheye to set the (manual) aperture. Manual or aperture
priority auto exposure modes (center-weighted or spot, since much
of the frame area is black) should work. Use the camera lens to
adjust focus. Changing camera lens FL's will adjust the size of
the fisheye image in the frame.
It is a fun toy, but unfortunately not very sharp...
Hope This Helps