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P3D Re: Lme Kbee super wide angle


  • From: Greg Erker <erker@xxxxxxxxxxxxxx>
  • Subject: P3D Re: Lme Kbee super wide angle
  • Date: Tue, 12 Oct 1999 09:58:10 -0600

>> I just got a medium format camera and a 30mm lens for
>> it.  For medium format, that 30mm is a full frame fish
>> eye lens.  So, what I was wondering is, if I am able
>> to track down some maching lenses (30mm) to view some
>> slide bar stereos taken with that set up, how will
>> that look different than with the 78mm lenses of the
>> saturn slide viewer?
>
>Since the fisheye lens is a sort of special effect lens anyway, I
>suggest viewing such pictures in a normal medium format viewer and being
>happy with the additional distortions.  Perhaps some others on the list
>who are more conversant with optics could suggest some alternatives with
>compound lenses, but I think that the coverage enabling you to see the
>whole image would still be a problem with a 30 mm effective focal
>length, no matter how it is obtained.

  I like the view of my 45mm diameter circular
fisheye images in my regular viewer (84mm FL lenses).

  My brother has built a multiformat viewer:
http://www.angelfire.com/ca/erker/patequip.html

It works best for viewing 35mm slides but can
also be used to view medium format slides. The
lenses are each double achromats and the resulting
optic is about 50mm FL by 36mm diamter. You
can see side to side on a 50x50mm image but
the corners are cut off. The sharpness at the
edge isn't as good naturally.

  It works pretty well for viewing my circular
FE images.

  I'll agree that a 30mm viewing lens isn't
practical. Viewing with the wrong FL doesn't
hurt the realism since fisheye images look
unusual anyway.

Greg E.