Yes, a 12th frame is a big plus on this camera and as easy as it sounds I wonder why the Zeiss Ikon didn't offer a factory upgrade? Or at least upgrade a camera when it came in for repair. Machining another notch or a complete replacement brass wind stop gear and a new number 12 on the counter dial is all it would have taken. Of course they were gearing up for war production at the time this camera was produced and a 12th frame conversion was probably the last thing on the companies mind at that time. I guess we will never know the answer to that question, but it's fun speculating anyway.I prefer this older model to the III or IV. Now having the chance of 12th frame I will propose it to clients when they come with theirs.
I wonder why the Zeiss Ikon didn't offer a factory upgrade?
I heard something similar to that before. The machining the extra notch and stamping/engraving a number 12 on the counter dial doesn't sound like much of a retooling job to me. That leads me to believe that it is what you guess and that's that the company had other issues at the time. Plus, the fact that a new model was coming out and it just wasn't worth the effort, time and money. What a shame. But, on the bright side is the fact that if these great cameras had 12 exp we'd probably now have to pay twice as much on the used market. Mine is loaded with a roll of PanF just waiting for a little break in the Michigan winter weather here. When I test with this roll I'll do the wind past 11 and trip the shutter with my finger trick to get 12 exposures. Can't have everything I guess. At least for now anyway.At the time this camera was introduced (1938 or so) not all 120 film was long enough to get 12 frames of 6x6 when starting with the 6x9 frame 1 mark -- which was done because not all 120 film had 6x6 frame markings before the War, either. Post-War production changes would have required changing the machinery that (precision) cut the notches in the wheel, which wasn't a good use of resources while still rebuilding from the War and Soviet confiscation of at least one of their production facilities as war reparations. This while work was already underway to produce the Super Ikonta III which, among other things, eliminated the precision prism fitting in the rangefinder extension on the front standard in favor of a rangefinder that worked the way almost every non-Zeiss rangefinder camera did.
Very interesting reading.This might be an interesting read, also, as it discusses that tumultuous post-War era that Donald mentions. Probably not directly applicable to this specific discussion yet potentially interesting.
Camera Geekery: Zeiss Ikon Super Ikonta II - Japan Camera Hunter
Camera Geekery: Zeiss Ikon Super Ikonta II by John Kossik John Kossik has been a contributor to the site for a few years now, so it is always nice to hearwww.japancamerahunter.com
manufacturers back then preferred selling a new camera than retrofitting old cameras if the user wanted the updated features and functionality.
Yes, necessity is the mother of invention. Don, wanted 12 exposures and was clever enough to figure out how to do it. Now we can all benefit. Thank you Donald!… and in general, it’s often challenging to have more than the original design provided. Not everything is blessed with aftermarket mod parts. More often, bad design or improvements are handled more effectively by a new design, from both an engineering and business standpoints. Thank goodness for clever DIY mods that actually work like Donald mentioned.
Thank you Donald!
Dan,John, I may have missed it- was the solution simple cleaning? Was the counter installed incorrectly, cleared up by reassembly?
The 11th notch was there but had a slight rough edge so I hand filed it off and polished the gear. I then looked at the pawl that locks the notch and it seemed to be slightly bent. I put the pawl on a flat surface and got it as straight as I could. Then I took all the wire springs and gave them a little tweak stretch to put a little more force on things like the pawl.
Could be Don, but I would have thought that it would have skipped a notch other than the 11th every now and then. Oh well, I don't care how I fixed it, just that it's fixed.Pretty sure that's what you did to fix it.
I would have thought that it would have skipped a notch other than the 11th every now and then.
Yes, I think it might have worked just by cleaning up the burred 11th notch, but while you're under the hood you change the oil, filter and check all belts while you're at it. The way I see my spacings if I started by one of the direction arrows just before the number one I have enough trailer length to get 13 frames. I'm not going to press my luck and I'll stick with just 12 when I do the notch.IMO, it was likely the combination of the slightly bent pawl and the burr on the #11 notch that caused the skip. Pawl wasn't bent enough not to work on a good notch, and there was just enough burr on #11 to cause the pawl to ride over. Fixing either one would likely have restored operation, but fixing both is better. And now you've seen what you need to see (including the shortening notch spacing as the roll progresses) to make the 12th frame modification if you choose to do so.
13 frames
Don, that's why I'm not going to get to Dutch and try to squeeze out 13 frames. Just be satisfied with what you have was my father's favorite line when I was growing up and I hated it, but he was right 99% of the time. I was usually right the other 1%.That's technically true with modern 120. I can shoot 13 with my Kodak Reflex II (which uses a length-counting roller and starts with the 6x6 track) by resetting the counter any time after frame 2. Problem is, where do I store the 13th frame? And when you're starting with the 6x9 track, you either risk running frame 13 off the end of the actual film, or (by starting early, thus making the roll thinner than it normally would be by a tiny amount) you get narrowed frame spacing with a turns-counting mechanism like the 532/16 uses.
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