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Carl Zeiss Jena 180 2,8 question
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PostPosted: Thu Feb 28, 2019 12:19 pm    Post subject: Carl Zeiss Jena 180 2,8 question Reply with quote
Hi folks!
Does anybody know what this little lever is for? The one on the opposite side of the lens locks the collar, but this one seems to have no use...


http://forum.mflenses.com/userpix/20192/big_10585_CZJ_1.jpg


PostPosted: Thu Feb 28, 2019 1:56 pm    Post subject: Reply with quote
It is a lever to preview the depth of field.

Remember that the lens is fully open when the Pentacon Six shutter is armed, or when using the lens with the original Pentacon M42 adapter, the user actuates the lever that arms the auto-diaphragm mechanism within the adapter.

With a "modern" chinese adapter without an auto-diaphragm mechanism, the DOF lever has no effect.


PostPosted: Mon Mar 04, 2019 10:52 am    Post subject: Reply with quote
Thank you very much, Gerald! Mistery solved... Smile
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