jaapv Posted January 18, 2012 Share #1 Â Posted January 18, 2012 Advertisement (gone after registration) I wonder when this was made, by the plastic I would guess 1950ies or early 1960ies Link to post Share on other sites More sharing options...
Advertisement Posted January 18, 2012 Posted January 18, 2012 Hi jaapv, Take a look here Please date this... I'm sure you'll find what you were looking for!
lars_bergquist Posted January 18, 2012 Share #2 Â Posted January 18, 2012 (edited) The only reference I have been able to find is the 1955 DIOOY but my source (Dennis Laney) shows it mounted on a Leica IIIf. Might it be that the same device was used on both bodies? I have no screw-thread Leica so I cannot compare the geometry. Â You say that the lenses are slightly off-center on your M9. May that be because the device is for a LTM camera? Â The fixed-dioptric old man Edited January 18, 2012 by lars_bergquist Link to post Share on other sites More sharing options...
Michael Hiles Posted January 18, 2012 Share #3 Â Posted January 18, 2012 It appears to be used to determine the correct diopter correction for individual eyesight correction. This device must be special to the M series. The distance between the viewfinder and the shoe is different on the screw mount Leicas. I know - no help at all. Link to post Share on other sites More sharing options...
lars_bergquist Posted January 18, 2012 Share #4  Posted January 18, 2012 It appears to be used to determine the correct diopter correction for individual eyesight correction. This device must be special to the M series. The distance between the viewfinder and the shoe is different on the screw mount Leicas. I know - no help at all.  Yes of course. The question is, are there actually TWO of these devices, one (DIOOY) for screrw-thread Leicas and one, unknown code, for M cameras?  Jaap's device may well be for M cameras; the higher top deck of a Leica M9 (and M6TTL and M7) means that the shoe is higher up, so that the whole gizmo rides c. 2mm higher relative to the finder eyepiece.  But in that case its code should not be DIOOY but something else – possibly DIOOY-M. Is there any code on the device itself? Admittedly, I have a CTOOM flash rail from the same period (white plastic, not metal) and it carries no code designation at all. Very inconsiderate of Ernst Leitz.  The fix-focus old man Link to post Share on other sites More sharing options...
jaapv Posted January 18, 2012 Author Share #5  Posted January 18, 2012 (edited) The only reference I have been able to find is the 1955 DIOOY but my source (Dennis Laney) shows it mounted on a Leica IIIf. Might it be that the same device was used on both bodies? I have no screw-thread Leica so I cannot compare the geometry. You say that the lenses are slightly off-center on your M9. May that be because the device is for a LTM camera?  The fixed-dioptric old man  No - that is because the M6TTL onwards are higher. It is offset in vertical only, horizontally it is spot-on.. I will try it on mt IIIf tonight. Edited January 18, 2012 by jaapv Link to post Share on other sites More sharing options...
lars_bergquist Posted January 18, 2012 Share #6 Â Posted January 18, 2012 No - that is because the M6TTL onwards are higher Itis offset in vertical only, horizontally it is spot-on.. I will try it on mt IIIf tonight. Â Yes, that's exactly as I would expect with a device for the M. The higher top deck and accessory shoe of the M9 displaces the wheel vertically, but not horizontally, as the finder eyepiece, restrained by the rangefinder design, has not been moved since the M2, I think. (I am not completely sure about the M3.) Link to post Share on other sites More sharing options...
UliWer Posted January 18, 2012 Share #7 Â Posted January 18, 2012 Advertisement (gone after registration) I fear the date of production hasn't been revealed yet. It is still unclear if it will be revealed before next Photokina or later as the present quarrels at Solms between the Ayatollahs of the rangefinder system and the new-born Young Men of the mirrorless-finderless system aren't settled. Â It will either compensate for miscalibration of different lenses for the M (stealth name MSFOC) or it will be used as the new viewfinder device for the post-M solving the problems of limitated field of view in the M rangefinder (NOFIN). Link to post Share on other sites More sharing options...
jaapv Posted January 18, 2012 Author Share #8 Â Posted January 18, 2012 Yes, that's exactly as I would expect with a device for the M. The higher top deck and accessory shoe of the M9 displaces the wheel vertically, but not horizontally, as the finder eyepiece, restrained by the rangefinder design, has not been moved since the M2, I think. (I am not completely sure about the M3.) M3 is the same I would say. Link to post Share on other sites More sharing options...
larsv Posted January 18, 2012 Share #9  Posted January 18, 2012 From liveauctioneers.com:   " Lot 262 translate email LEICA Misc. Accessories: DIOOY Diopter Selector  Sign In to see what this sold for dioptre selector disc, rare accessory for dealers' use (Condition: B, c.1955)  LEICA Diverses Zubehör: DIOOY Dioptrienaugleich  Zubehör für Händler zum Bestimmen des Dioptrienausgleichs (Zustand: B, c.1955)" 1 Link to post Share on other sites More sharing options...
larsv Posted January 18, 2012 Share #10 Â Posted January 18, 2012 (edited) http://www.rangefinderforum.com/forums/showthread.php?t=29680: Â Interesting leica accessory I hadn't seen before... DIOOY that's exactly what it is...Hove's Leica Accesory Guide says it was made in 1955, a "Diopter Selector Disc" with -5 to +4 diopters "for the use of dealers." Â Amazon.com: Leica Accessory Guide (Hove Collectors Books) (9781874707264): Dennis Laney: Books Edited January 18, 2012 by larsv addition Link to post Share on other sites More sharing options...
Pecole Posted January 18, 2012 Share #11  Posted January 18, 2012 I wonder when this was made, by the plastic I would guess 1950ies or early 1960ies  In Lager's Volume III - Accessories (page 50), "DIOOY diopter checker for dealers" is illustrated mounted on a M3. 2 Link to post Share on other sites More sharing options...
SJP Posted January 18, 2012 Share #12 Â Posted January 18, 2012 What is the Leica code for "eye replacement device"? Mine are up for that at -6.5 & -7. Link to post Share on other sites More sharing options...
pedaes Posted January 18, 2012 Share #13  Posted January 18, 2012 Red Dot have one for sale at £199. They describe as "very rare". Link to post Share on other sites More sharing options...
jaapv Posted January 18, 2012 Author Share #14 Â Posted January 18, 2012 Yes - mine came from Red Dot a few days ago - they seem to have had two available - utterly amazing! Link to post Share on other sites More sharing options...
jc_braconi Posted January 18, 2012 Share #15  Posted January 18, 2012 I wonder when this was made, by the plastic I would guess 1950ies or early 1960ies  1 year ago  http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/162476-diooy.html 1 Link to post Share on other sites More sharing options...
alan mcfall Posted December 21, 2017 Share #16  Posted December 21, 2017 I have four of these, they are all the same. I had not thought there might be two different versions, one for the LTM and one the M cameras.The cameras difinitely have different positions of the rangefinder window relative to the accessory shoe position. To the best that I can measure, the M window center is 3.4mm lower and 9.6mm farther away from the shoe than on the IIIf. Interestingly, the DIOOY wheel has 10 windows, so 36 degree spacing, on a radius of 15.5mm. With a little geometry I can calculate that the difference in location of the lowest window ( at 6 oclock) and a perfect match for the M camera finder center; and the window at near 5pm, which is 36 degrees rotated, is almost the same as the height and distance needed to perfectly match the IIIf window. Is there a chance Leitz was aware of this, it was 1954-55 and the M camera was known? Or just a coincidence.Maybe their engineers built this into the design. And there seems to be no listing of the DIOOY-M found.  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!  My trusty M2-M on the upper left, the IIIf on top right, a IIIc lower left, and a IIIa on lower right. On the M camera the bottom most window is used and seems very well centered to me. On the IIIf, the window at near 5pm is used, and the image is dead center on the rangefinder image. The same is true for the IIIc, but on the IIIa the mismatch is noticable, but sill usable. So, for me the DIOOY works equally well for the LTM or M camera, you just have to use a different position on the circle for your eye before rotating. As the DIOOY was primarily ordered from dealers, maybe they discovered the same usefulness and they didn't need two different diopter selectors. All corrections and ideas appreciated.   3 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members!  My trusty M2-M on the upper left, the IIIf on top right, a IIIc lower left, and a IIIa on lower right. On the M camera the bottom most window is used and seems very well centered to me. On the IIIf, the window at near 5pm is used, and the image is dead center on the rangefinder image. The same is true for the IIIc, but on the IIIa the mismatch is noticable, but sill usable. So, for me the DIOOY works equally well for the LTM or M camera, you just have to use a different position on the circle for your eye before rotating. As the DIOOY was primarily ordered from dealers, maybe they discovered the same usefulness and they didn't need two different diopter selectors. All corrections and ideas appreciated.   ' data-webShareUrl='https://www.l-camera-forum.com/topic/170784-please-date-this/?do=findComment&comment=3422574'>More sharing options...
luigi bertolotti Posted December 21, 2017 Share #17  Posted December 21, 2017 I have four of these, they are all the same....  Is there a chance Leitz was aware of this, it was 1954-55 and the M camera was known? Or just a coincidence.Maybe their engineers built this into the design. And there seems to be no listing of the DIOOY-M found.  On the IIIf, the window at near 5pm is used, and the image is dead center on the rangefinder image. The same is true for the IIIc, but on the IIIa the mismatch is noticable, but sill usable.... So, for me the DIOOY works equally well for the LTM or M camera, you just have to use a different position on the circle for your eye before rotating. As the DIOOY was primarily ordered from dealers, maybe they discovered the same usefulness and they didn't need two different diopter selectors.  Interesting observation, Alan... I tend to think that the usability on both IIIf and M (with the "5/6 o'clock trick") is a design feature... after all, with some more little geometry you can verify that playing with 2 design parameters (the height and length of the arm - center of shoe to center of the DIOOY) you can match the two VF centers (m3/IIIf) so that they result "centered" on the 6 o'clock/5 o'clock positions. 1 Link to post Share on other sites More sharing options...
jc_braconi Posted December 21, 2017 Share #18  Posted December 21, 2017 Posted 25 January 2011 - 10:24 As eyesight correction lens have been available at least from 1933,appropriate fittings have been brought in, to suit new cameras and reflex housing.Lenses to correct for astigmatim have followed a couple of year those for spherical correction only.In 1973 Leitz would only supply a mount for M cameras (code 042 253 008) and the customer's optician supplied the lens.In 1977 there was a further change of policy and individual correction lenses were supplied for current M cameras.For the use of the Leica dealers a diopter selector disc (-5 to +4 diopters) was provided in 1955.  My modest contribution : 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! 4 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/170784-please-date-this/?do=findComment&comment=3422655'>More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now