Steve:
How about some empirical testing? Slip them into a PVC pipe and see if they make a decent image.
Charley
Steve:
How about some empirical testing? Slip them into a PVC pipe and see if they make a decent image.
Charley
Actually I thought of trying to get the barrel lens on something with a digital back then unscrewing the cells turn at a time, then half turn to fine tune while pixel peeping. Great use for a digital camera!
Cheers, Steve
The barrel lens arrived (marked 45cm) and the front cell screws into the shutter for my 19" Artar - can't get the rear one loose yet.
I thought maybe that the 45cm/18" was so uncommon they probably didn't make unique adapters for it.
Cheers, Steve
Actually Goerz were NOT sloppy about spacing whatsoever, that comment should be reserved and used most often with another lens maker....Carl Zeiss, the kings of sloppy optical construction.
As many of you may have found you can't take the cells from one Artar and use the barrel for another, each lens was HAND TUNED to its own specific barrel, its quite rare and I've only had a perfect fit in one case over decades of trying. The focal length of the lens may be 455mm or 17 1/2" approx, does the barrel actually say 18"? If so it may have been a custom job, Goerz did that kinda thing from time to time. Good luck finding a barrel for the lens, all I can suggest is perhaps using a 19" barrel and adding tape to the threads for a fit then once proper sharpness is achieved to silicone the cells in place...kinda rough and ready but saves the expense of shutter mounting.
The rear cell on my 16 1/2" will not screw into the barrel when it is just snugged into the flange. Loosen it in the flange, and the cell screws in perfectly freely. That's how closely Goerz fitted the threads.
One man's Mede is another man's Persian.
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