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NIZO Aperture hole shape


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#1 Damien Dubois

Damien Dubois
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Posted 21 May 2008 - 10:42 PM

Hello,

I recently bought a NIZO s800 & a 801 and on both, the same thing happens. Let me show you.
With the Red lever pulled and locked, When I set the aperture size in manual and I tweak the button, it gives me that (pictures of the gate, backdoor opened):

aperture_size.jpg

It's quite strange that the diaphragm shape is not circle (like in a SLR camera), but seems to be two clamps crossing each other.

Is it ok? or are my camera broken?

I really do ask myself about how the film can be correctly printed if there's such a shape in front of it...

Thanks for your answer and explanation

Best regards

Damian

Edited by Damien Dubois, 21 May 2008 - 10:46 PM.

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#2 Michael Lehnert

Michael Lehnert
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Posted 21 May 2008 - 11:35 PM

This is absolutely okay. Do not presume that the multiple lamelle iris found on SLRs is the only construction type for aperture controls. It is quite normal for smaller lens constructions to use fewer lamelle iris types. I don't have the time to go into the opto-mechanical details now because I will have to go off-forum for a job, but I am sure others will chime in with more extensive explanations. If not, I shall revisit this thread next week. Rest assured, the 2, 3, 4 or 5 lamelle construction found in film cameras works absolutely fine and allows excellent depictions.

Cheers,

-ML
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