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Lens with double aperture? 2X12 blades?
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PostPosted: Tue Aug 07, 2018 4:54 pm    Post subject: Lens with double aperture? 2X12 blades? Reply with quote

This is the first time I see this kind of aperture.
It looks as if two apertures of 12 blades each are stacked upon each other.
With one aperture being slightly bigger then the other (this is only visible from the back of this lens).

I have never seen such an aperture before, I can’t find any information about it and I have no clue what the reason for this could be.

The lens is a (rare) Kaligar 80mm f/2.8 preset lens.



PostPosted: Tue Aug 07, 2018 5:01 pm    Post subject: Reply with quote

A while ago http://forum.mflenses.com/double-diaphgram-t79329.html


PostPosted: Tue Aug 07, 2018 8:13 pm    Post subject: Reply with quote

calvin83 wrote:
A while ago http://forum.mflenses.com/double-diaphgram-t79329.html


Thanks for you reaction.


PostPosted: Fri Aug 10, 2018 11:54 am    Post subject: Reply with quote

Look at the mindblowing bokeh of this double aperture lens:
http://kurtmunger.com/sony_135mm_f_2_8__t4_5__stfid268.html


PostPosted: Fri Aug 10, 2018 1:42 pm    Post subject: Reply with quote

caspert79 wrote:
Look at the mindblowing bokeh of this double aperture lens:
http://kurtmunger.com/sony_135mm_f_2_8__t4_5__stfid268.html


Now THAT is really a DOUBLE APERTURE lens, it is well known!!