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06-25-2011, 07:41 AM   #1
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[langtitle=fr]Click Stops on Pentax 6x7 lens ?[/langtitle]

Hi !

can you help me to understand what is "Click Stops" system

i'm the happy new owner of the 55mm-100mm for Pentax 6x7
Pentax 67 55-100mm F4.5 Reviews - 67 Zoom Lenses - Pentax Lens Reviews & Comprehensive Database
Pentax Zoom 55-100mm f/4.5 SMCP-67 Lens for Pentax 67

i have the manual with this page :
http://img405.imageshack.us/img405/8184/1008175.jpg

i try to translate it but with my english i don't understand all...
and tranlator like GoogleTrad translated a little no matter how

the only thing, i think I understand..., that Click Stops is other aperture between f/4,5 and f/8 (on the 55-100)
but what i don't understand is why they are hidden aperture ?
f/5,6 is present on all lens !
and what is the other click/aperture between f/4,5 and f/8 ?


So in thanks you in advance and I hope that someone enlighten me on these points

06-25-2011, 02:08 PM   #2
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Pentax had a tendency to not label the second click on their lenses during the manual era, but it represented a whole stop slower than wide-open.

On that particular lens, it should go 4.5, 6.7, 8, where 6.7 is at the unlabeled dot. You can't select 5.6 because it's only half a stop slower than wide-open. Thereafter, the stops should be 9.5, 11, 13, 16, 19, 22 and 32.

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07-27-2011, 10:10 AM   #3
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Merci beaucoup Adam pour ton aide !!!
c'est plus clair pour moi maintenant

désoler de repondre si tard, j"etais en vacance !!!
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