On 26/7/05, Rob Studdert, discombobulated, unleashed:

>The Pentax fish-eye lenses are what is generally referred to as full-frame 
>fisheyes in that their image circle doesn't fit within the frame but is 
>designed to provide 180 degrees across the diagonal of the frame. A full-
>frame 
>fisheye lens designed for 35mm film use will provide a diagonal angle of
view 
>of approximately 118 degrees across the DSLR frame. Due to the spherical 
>projection type the more visible distortion visible in a full 35mm frame
will 
>be cropped so it will render more like a rectilinear lens with severe barrel 
>distortion.

Has anyone tried using the Pentax 17mm f/4 on a DSLR? I was really
impressed with it on a film SLR when I handled one a few years ago. It
was magic.




Cheers,
  Cotty


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