copal shutter question

Jordan.K · Apr 29, 2007

Ok, so I have a 135mm nikkor but would really like 150mm Apo rodenstock. The Rodenstock I am eyeing is in a sinar mount adn the Nikkor I have is in a copal 0. If the f-stops correspond, then is it possible to interchange the shutters? Are all copal 0 shutters the same depth and can they be interchangeable?

Ole · Apr 29, 2007

All Copal 0 shutters are the same (AFAIK).

BUT: The f-stop scales for a 135mm lens and a 150mm lens will be different!

Jordan.K · Apr 29, 2007

ok, so if I get another 135mm that opens up and closes down to the same f-stops then it should be perfectly interchangable?

Oren Grad · Apr 29, 2007

In principle, yes, but be careful - modern lenses sometimes come with shim rings to get the cell spacing exactly right. The shims can be dainty little things - if you find yourself swapping cells, make sure you don't miss any shims, and that they go back in the right place.

I'd be much more comfortable just buying a lens already mounted properly in the shutter I want.

ragc · Apr 29, 2007

Of course, there is $K Grime$....

jimgalli · Apr 30, 2007

Methinks you're chasing silver bullets. I wouldn't be able to tell the difference between a neg made with the Nikkor or the Rodenstock. Make pictures with what you've got. (this from a guy who has 200 lenses :rolleyes: )

Sparky · Apr 30, 2007

the difference in F.L. is 1/3 stop - right? So now your 5.6 position on your 135 becomes your 5.6-1/3 (sorry to not give you a precise decimal - I'm not so geeky - but you get the drift, right?)

If you get one - check the flange distances pre and post DB. SOME, to the best of my knowledge, require slight shimming on copal shutters - of course the lens mfrs do their level best to avoid extra parts where possible, as it just adds to the expense.

copal shutter question

Jordan.K

Ole

Moderator

Jordan.K

Oren Grad

ragc

jimgalli

Sparky

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