P3D Re: Nimslo aperature plate

[Tom Deering <tmd@xxxxxxxxxxx>]

On 8/20/98, Smart, Lattie            MD06 wrote:
>Well, no $50 Hyponar has manifested itself to me, soooo...
>I want to try some more close-up and macro shots on my old Nimslo.
>The out-of-hand solution into tricking the aperature to shut way down
>is to put a grain-of-wheat bulb over it. I do not think this is too elegant.
>
>Has anyone attempted to put some kind of pinhole mask up into the
>stepped chamber? Would this work - having it BEHIND the lens?
>Any suggestion how to *properly* go about it?

Properly?  I'm not sure about that.  But here's an alternative.  Take the
thing apart.  Notice that metal assembly the lenses are mounted on?  The
shutter is that long dark strip behind the lenses-actually two strips.
When the shutter is tripped, the top one moves right, and the bottom one
moves left.  The farther they move, the larger the aperture.

If you were to find a way to limit the travel of those two strips, you'd
have a smaller aperture.   I could think of a couple ways, but it's up to
you and your skills.

Since the aperture is also the shutter, this might leave you with a
completely fixed shutter/aperture.   Not so bad if you intend to always use
a flash.

I have not tried this myself, but have considered doing it to my macro
Nimslo.  A nice experiment if you like that sort of thing.

Tom



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