k-hawinkler Posted May 10, 2011 Share #1 Posted May 10, 2011 Advertisement (gone after registration) OUFRO : Large Knob : Large Red Pin : Ernst Leitz Wetzlar Germany 16469Y : Small Knob : Large Red Pin : Ernst Leitz Wetzlar Germany 16469 : Small Knob : Small Red Pin : Leitz Wetzlar Germany Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! M9 + Visoflex III + Elmar 65/3.5 Provided these are indeed original items, when were the different versions made? Best, K-H. 2 Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! M9 + Visoflex III + Elmar 65/3.5 Provided these are indeed original items, when were the different versions made? Best, K-H. ' data-webShareUrl='https://www.l-camera-forum.com/topic/151404-oufro-16469y-16469-differences/?do=findComment&comment=1668272'>More sharing options...
Advertisement Posted May 10, 2011 Posted May 10, 2011 Hi k-hawinkler, Take a look here OUFRO 16469Y 16469 Differences. I'm sure you'll find what you were looking for!
luigi bertolotti Posted May 10, 2011 Share #2 Posted May 10, 2011 (edited) A fine multistrate extension tube...... I think in the right time order - oldest at the top and all the weight on the shoulders of the youngest : I am not 100% sure, but by logic the 5 letters code were the first, then the 5 digits with letter (whose significance, btw, has been always unclear to me... I have never seen 2 identical set of digits with a different letter), then the "modern" (still used) 5 digits-only code... imho, the obliteration of the name "Ernst" is also a sign of a later build. Edited May 10, 2011 by luigi bertolotti 1 Quote Link to post Share on other sites More sharing options...
k-hawinkler Posted May 12, 2011 Author Share #3 Posted May 12, 2011 Luigi, You are quite right. That's how I sometimes use them. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Here coupled with some Kenko extension tubes for Nikon mounts and Leica to Nikon and Nikon to Leica adapters on M9, Viso, and 400/5.6. Some images obtained with this rig: A couple more images are posted here: http://www.l-camera-forum.com/leica-forum/nature-wildlife/181512-bees-dark-light-3-images.html Bees need water too. Best, K-H. 8 1 Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Here coupled with some Kenko extension tubes for Nikon mounts and Leica to Nikon and Nikon to Leica adapters on M9, Viso, and 400/5.6. Some images obtained with this rig: A couple more images are posted here: http://www.l-camera-forum.com/leica-forum/nature-wildlife/181512-bees-dark-light-3-images.html Bees need water too. Best, K-H. ' data-webShareUrl='https://www.l-camera-forum.com/topic/151404-oufro-16469y-16469-differences/?do=findComment&comment=1670182'>More sharing options...
jc_braconi Posted May 12, 2011 Share #4 Posted May 12, 2011 Impressive results ! Congratulations ! Quote Link to post Share on other sites More sharing options...
k-hawinkler Posted May 13, 2011 Author Share #5 Posted May 13, 2011 JC, Thank you, K-H. Quote Link to post Share on other sites More sharing options...
Dao De Leitz Posted August 28, 2011 Share #6 Posted August 28, 2011 (edited) Hello K-H., thank you for the pictures of the stacked rings and the bees. The rings have a small shift in the position of the locking mechanism. Does somebody now the reason why the rings have a misalignment of about 0.5mm / circa ~1.5° in the same direction? Greeting Thorsten Edited August 28, 2011 by Dao De Leitz ___ Quote Link to post Share on other sites More sharing options...
luigi bertolotti Posted August 28, 2011 Share #7 Posted August 28, 2011 Advertisement (gone after registration) Hello K-H.,thank you for the pictures of the stacked rings and the bees. The rings have a small shift in the position of the locking mechanism. Does somebody now the reason why the rings have a misalignment of about 0.5mm / circa ~1.5° ? Greeting Thorsten I'm not sure is like you say... can be a "taking effect"... imho, if one takes a precisely composed picture (stacked knobs along the vertical axis of the frame, center of the frame at 1/2 of the height of the stack) they probably result perfectly aligned... the tolerancing of the bayonet engagement must be very strict... of course, is not like this for the position of the red dot, which can have a rather rough tolerancing. Quote Link to post Share on other sites More sharing options...
Dao De Leitz Posted August 28, 2011 Share #8 Posted August 28, 2011 (edited) Thank you L.B., my first thoughts were the same - but my small stack is rotating the lock a little. Greeting Thorsten Edited August 28, 2011 by Dao De Leitz . Quote Link to post Share on other sites More sharing options...
k-hawinkler Posted August 28, 2011 Author Share #9 Posted August 28, 2011 Well I have stacked up my 10 rings, namely 3 OUFRO, 5 16469Y, and 2 16469. The only rings that stack up without a shift are the two 16469. The other eight seem to be shifted by about the same amount and line up at a slight angle with little variation. One of the 16469Y rings seems to be shifted hardly at all. Of course, there is some play. However, even if I force the rings to line up as much as possible the slight shift remains. Could it just be a slight misalignment in the manufacturing setup from batch to batch? Funny but unimportant in using the rings. K-H. Quote Link to post Share on other sites More sharing options...
k-hawinkler Posted August 28, 2011 Author Share #10 Posted August 28, 2011 Thank you L.B., my first thoughts were the same - but my stack is rotating the lock a little. Greeting Thorsten The lock, red markers, and engravings seem to rotate just a little bit. K-H. Quote Link to post Share on other sites More sharing options...
Dao De Leitz Posted August 28, 2011 Share #11 Posted August 28, 2011 ... Funny but unimportant in using the rings. ... This is what I wanted to proof. Thanks! Greeting Thorsten Quote Link to post Share on other sites More sharing options...
luigi bertolotti Posted August 28, 2011 Share #12 Posted August 28, 2011 (edited) Well... indeed, thinking well of it, my considerations about tolerancing were not 100% correct... : strict tolerancing is needed in the angular positioning of the slot towards the male bayonet (bottom part of the ring) and, same way, the knob towards the female bayonet (top part of the ring) , but the two parts, in itselves, can afford a certain misalignement of some degree, one to each other: as noted above, this does not compromise the functionality of the device... the only inconvenient with a std. lens mounted onto is to have, say, the focus datum line not exactly at 12 o'clock... minor issue. Edited August 28, 2011 by luigi bertolotti Quote Link to post Share on other sites More sharing options...
ellisson Posted November 28, 2016 Share #13 Posted November 28, 2016 How much closer (or magnification) do you get with a single OUFRO ring? Does one ring buy any macro effect, say with a 75mm summicron? Does one need to stack multiple rings for a significant macro function? Thanks, Gary Quote Link to post Share on other sites More sharing options...
jankap Posted November 28, 2016 Share #14 Posted November 28, 2016 (edited) To achieve a 1:1 magnification with a 75mm lens (set on infinity) you need a 75mm extension. One ring will not help very much. Jan Edited November 28, 2016 by jankap Quote Link to post Share on other sites More sharing options...
jankap Posted November 28, 2016 Share #15 Posted November 28, 2016 An OUFRO is 10mm thick. So with this extension you can reach a distance of about 350 to 600 mm with a 75mm lens. Jan Quote Link to post Share on other sites More sharing options...
John McMaster Posted November 28, 2016 Share #16 Posted November 28, 2016 How much closer (or magnification) do you get with a single OUFRO ring? Does one ring buy any macro effect, say with a 75mm summicron? Does one need to stack multiple rings for a significant macro function? Thanks, Gary Probably better off with the newer Macro-Adapter-M which can vary between 18mm and 30mm http://en.leica-camera.com/Photography/Leica-M/Technical-Equipment/Close-Up-Accessories/Macro-adapter-Mjohn Quote Link to post Share on other sites More sharing options...
luigi bertolotti Posted November 28, 2016 Share #17 Posted November 28, 2016 Probably better off with the newer Macro-Adapter-M which can vary between 18mm and 30mm http://en.leica-camera.com/Photography/Leica-M/Technical-Equipment/Close-Up-Accessories/Macro-adapter-Mjohn Surely... and for about 1/3 of its price one can buy the Novoflex LEM/VIS-II... not continuous variation like the Leica Macro Adapter (is a set of rings), but well made, functional, and even with a plus of its own (the full set of rings has a length equal to the Visoflex II/III) Quote Link to post Share on other sites More sharing options...
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