Shel Belinkoff <[EMAIL PROTECTED]> wrote:

[Putting a pinhole body cap on extension tubes or bellows.]

> Wow is right!  Your comment just got me thinking about the possibility
> of using the helicoid extension tube with a pre-drilled body cap. 
> Infinitely variable focal lengths without the hassle of a bellows, which
> is bigger, bulkier, and more difficult to "zoom". The helicoid will
> extend and retract just like focusing a lens. What a nifty idea.

Danm, I forgot that option.
 
> I don't have a clue as to what the view through the finder would be with
> a pinhole cap in place of the lens, but maybe I'll just drill a tiny
> hole in a cheap cap just to see the effect.  Has anyone used a pinhole
> cap on a Pentax?  Can you see the image in the finder?

Don't expect too much from the viewfinder image. It *will* be very dark,
even on a bright, sunny day. What have you got to lose? Body caps are
not that expensive. Ok, I never tried it, but I did try the DOF preview
(with a MX and the lens stopped down to F22) and the image was hardly
visible.

[Rest deleted]
-- 
http://members.chello.nl/~j.schoone                                \\|//
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