RE: Pinhole and SLR

[Joe Berenbaum <joe-b@xxxxxxxxxxxx>]

At 02:43 30/05/97 -0600, you wrote:
>>...the Russian turret
>> multi-finder. Just stick it in the hotshoe and you have a
>> parallax-correctable viewfinder for 28/35/50/85?/135mm. Or there is the
>> Russian 35mm brightline finder also...
>
>These sound interesting.  Where can you get one?

It's a case of looking around. I live in the UK and there are two offered
for sale, used, in Amateur Photographer this week, one for about UKP 70.00
and I think one for around UKP 30.00. The higher price is more usual. I'd
look anywhere that sells Russian equipment, classic cameras, rangefinder
stuff, or indeed anywhere.

>> Or maybe one could learn something from Willem-Jan and put the pinhole
>> between the film rails? ;-}
>
>No, the pinhole is the lens.  There are no other optical elements.  What I
>had intended to show with my previous post is that the closer the pinhole
>gets to the film plane, the harder it is to make.  Putting the pinhole at
>the film rails would require a VERY small pinhole.

I should apologise for not making this clearer- my suggestion of a pinhole
between the film rails was a joke! I used a ;-} but maybe I should have made
it more obvious. 

What I'd like to try sometime, ideally on a view camera so that there would
be no problem with a reflex mirror hitting it- is making a pinhole that
could come quite close to the film plane- much closer than a pinhole mounted
on an SLR body cap could. It would be on bellows and so in theory I'd have a
zoom pinhole. Then I could check the coveage indoors with some high
intensity lights and calibrate it so I have an idea what it covers at what
bellows extension, and then just use a separate viewfinder of some sort for
framing the picture in normal light levels. Well it's an idea...


Joe B.

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