That's what it's supposed to be in. In theory, that puts a 16mm spacing between the two cells. The Prontor is also 16mm but the front thread is a bit different:Originally Posted by Larry Gebhardt
I'm just seeing if I need to remove a bit more metal to get the spacing right.
Steve.
Steve, I went to the archived old Schneider site and looked at the old brochure. Same dimension. How long is yours?
FWIW, I have a 65/8 Ilex that came to me in an electric shutter badged Opto Dynetics. Cells threaded #00, shutter tube length 10 mm. Steve Grimes insisted that lens and shutter were by Ilex, machined a regular (tube length 16 mm) #00 to accept the cells and give the right spacing. He muttered something about "the shoulder problem." If you have a #00 that seems too long, well, its the shoulder problem again and can be fixed.
I know it can be fixed, I'm just trying to determine how much fixing I need to do!
I'm going to aim for the 56mm in the Schneider data sheet and see what the results are. I don't know what the measurement is now, I just have a feeling that it's a bit too long.
This is what it is doing at the moment:
Sharp in the middle, blurry on the outside.
I like the effect but it would be nice if I could control it. i.e. correct spacing screwed all the way in, unwind a few turns for blurry edges!
Steve
I don't see how my lens could get any shorter, short of removing metal. I wonder if they changed the design at sometimes during the run. So what else could account for the almost 1.5mm longer length vs the published specs?
Larry, its a question of the lens cell's design. Some flare a little, have shoulders and won't screw as far as necessary into a shutter that's threaded normally. The solution is to bore the shutter tube out to accept the shoulder.
This might be a bit offtopic but I'm sure that they did change things during the run. I used to own a 65/8 super angulon that was in a compur 0 (i.e. NOT 00) shutter, and I've never heard or read of another instance like it. Mine was in a non-original shutter which originally came from a rodenstock 65/4.5, but when inspecting the threading on the lens cells everything to my eye looked as if it was all original and "factory". No sign of machining or anything like that. I have a couple of photos from when I sold it:
It was sharp edge to edge so I can only assume all the cell spacing was correct. Sorry I didn't measure it before selling it Steve.
I haved heard of them being fitted to size 0 shutters before but I haven't seen one. I assumed they used threaded barrels to make them fit into a larger diameter opening.
Steve.
Steve, what measurement have you achieved so far? I wouldn't start machining just yet. That Schneider fact-sheet was for the lens mounted in a Copal shutter, which I suspect makes it newer rather than older. I wouldn't count on Schneider telling the whole story in those fact sheets.
Rick "who has a couple he can measure" Denney
Rick, I went to the archived old Schneider site too. http://web.archive.org/web/201009220...hiv/archiv.htm The '67 W/A lens brochure shows a lens in a Compur, says that the 65/8 SA goes in a #00 and that its total length is 56 mm. Go see for yourself.
Heh, sure enough. We'll see what my calipers say. I have two lenses--I'll probably see two different measurements.
Rick "stay tuned" Denney
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