In a message dated 99-05-28 05:49:28 EDT, you write:
> : Has anyone put a filter or wide lens adapter (normally used for video)
> : to make there super wide into a very poor man's fish-eye? I've been
> : messing with some wide lens adapters used for video. I have not really
> : found anything giving me more than maybe a 120 degree field of view.
> : But I have not really tried too hard. It's going to be used for
> : immersive imaging. I'm sure some one has tried this with more success
> : than me.
>
I have an (obviously) older Spiraton 0.15X fish-eye adapter that gives 180
degrees horizonally with a 50mm lens. (50 x 0.15 = 7.5mm) I get vignetting
when I stop the 50mm down so I have to stop the fisheye adapter down with its
own diaphragm.
See the following page for fisheye adaptations. Also Helmut Dersch has some
software that will convert fisheye images to rectilinear (I think).
http://www.smu.edu/~rmonagha/bronfe.html
Warren
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