>In completely unrelated news, I finally got around to making a hole
>in a lens cap to mount one of those fisheye peephole thingies I got
>at a hardware store many months ago, and played with it on the front
>of an M42 50mm briefly. It does want a short extension tube behind
>it (and if there's a 2x converter behind _that_, the image becomes
>a reasonable size in the viewfinder), but I noticed that I was unable
>to focus (with or without the 2x). There was a definite point of
>_least_ blurriness, but at no point in my experiments was anything I
>saw through it _sharp_. Holding it up to my eye, things look sharp
>through it. I don't really understand why (though if anyone does
>understand and wants to have a crack at explaining it, I'd be grateful).
>I'm guessing that it doesn't project an image the same way a normal
>photographic lens does, but relies on the eye to focus _through_ it.
>But I don't understand why the camera lens can't focus through it.
>
>
> -- Glenn
>
Might be that the minimum focus distance of your eye is better than that of
your M42 50mm. Sounds like a cool project, though.
Dan Scott
[EMAIL PROTECTED]
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