sisoje Posted March 8, 2007 Share #1 Â Posted March 8, 2007 Advertisement (gone after registration) Just to give heads up to all interested in changing the mount ring on Zeiss ZM 25mm lens (from standard one that brings up 28 frame on M8 to 35mm mount that will bring up 24 frame): I got the confirmation from Zeiss that they shipped the part; It should be here on Friday. This is all thanks to Jaap. I will keep you posted. Link to post Share on other sites More sharing options...
Advertisement Posted March 8, 2007 Posted March 8, 2007 Hi sisoje, Take a look here New mount for ZM 25mm from Zeiss. I'm sure you'll find what you were looking for!
jaapv Posted March 8, 2007 Share #2 Â Posted March 8, 2007 Glad it worked Steven. Link to post Share on other sites More sharing options...
leicabug Posted March 8, 2007 Share #3 Â Posted March 8, 2007 Is changing the mount ring a DIY job? Link to post Share on other sites More sharing options...
jaapv Posted March 8, 2007 Share #4 Â Posted March 8, 2007 Yes, although Zeiss has some doubts about calibration. Basically it is unscrew four little screws, change mount, tighten four little screws. Link to post Share on other sites More sharing options...
sisoje Posted March 14, 2007 Author Share #5 Â Posted March 14, 2007 Quick update: I was able to replace the mounting ring on my ZM 25mm, with the one I received from Zeiss (35mm lens mount). Here is the information from the Order list: Â Â Article #: 00000-1460-875 Description: mount BBA 251 A 40 Article #: 00000-1460-876 Description: screw BBA 215 H 408 -Cosina- (4X) Â Â Â Yes, I had problem starting to remove the screws at first but that was resolved as soon as I attached my screwdriver to a wrench (and got a much larger rotation momentum). All 4 screws came out fine, and I reused the same (new set is for a back up). Now, I have to do some testing to see if the lens is still as sharp as it was before the "fix". Of course, now I have 24/35 lines in the viefinder.... Link to post Share on other sites More sharing options...
arthury Posted March 14, 2007 Share #6 Â Posted March 14, 2007 How much did it cost you to buy that mount --- directly from Zeiss? Â I wonder if they have a similar one for the 21mm ZM Biogon? Link to post Share on other sites More sharing options...
sisoje Posted March 14, 2007 Author Share #7  Posted March 14, 2007 Advertisement (gone after registration) How much did it cost you to buy that mount --- directly from Zeiss? I wonder if they have a similar one for the 21mm ZM Biogon?  I got the quote for the parts: 28 EUROs plus shipping. I still did not get a final invoice from Zeiss. What kind of mount you are looking for to put on your Zeiss 21mm? Maybe I can sell you one I got off my 25mm? Link to post Share on other sites More sharing options...
robertwright Posted March 15, 2007 Share #8 Â Posted March 15, 2007 while I am not expecting there to be any focus difference, I am hoping this works, as I am inches from buying a zeiss 25... Â Now can we have a discussion about durable hand coding of lenses? I wonder if those p-touch labelers use tape that might be thin enough to work. You could print a bunch and when they wear out stick on a new one. Â I have not had reliable success using the sharpie, I am not sure what i am doing wrong. Plus it just rubs off too easy and makes a mess. Link to post Share on other sites More sharing options...
d_brown Posted March 15, 2007 Share #9 Â Posted March 15, 2007 Robert, tape won't work because even .001" will affect the plane of focus. A 25mm lens, in fact all lenses, have a *very* critical lens to film plane distance. Most people don't understand how very accurately the lens elements must be fitted to the mount. The only way to do it right is to mill recesses in the mount and fill them with paint. I have the machinery and know-how to do it. Some day I may get around to making a fixture so I can accurately code the mounts. It isn't rocket science, just old fashioned care and precision. Your best bet for now is to use a Sharpie and touch it up when necessary. Â PS: Clean the mount carefully with a very little lighter fluid or alcohol before you code it. The ink won't stick to waxy or dirty surfaces at all ! Link to post Share on other sites More sharing options...
robertwright Posted March 15, 2007 Share #10 Â Posted March 15, 2007 There are screws on the mount which cause errors, which is why I was interested in a tape-like solution. Â I am sure you are right, but I am sure my handholding causes more unsharpness than I care to worry about. Link to post Share on other sites More sharing options...
d_brown Posted March 15, 2007 Share #11 Â Posted March 15, 2007 If I were going to hand-code a lens and there was a screw in the coding area, I'd carefully fill the recess over the screw with white paint. Then you have a fully reflective surface to code over. Your choice of paint will determine how much trouble the next guy has getting the screw out in the unlikely event it must be removed. Link to post Share on other sites More sharing options...
robertwright Posted March 15, 2007 Share #12  Posted March 15, 2007 I have tried a few ways, and I don't understand what I am doing wrong. I am trying to code a 21mm 2.8 (midland) which should be numerical value "1" according to the code list, 5 white marks and a black mark, going clockwise with the codes at 12 o'clock. it doesn't get recognized. Neither can I make my elmarit 28 (IV) register either.  I did happen on an interesting sticker tho, turns out the inner donut "hole" of a cd/dvd label is very close to the circumference of the outer of the lens mount. You can run the dvd label through your printer and overlay the template, modified to have the correct code. it also prints the "notch" for lining the sticker up.Then you just peel, align, and trim to the edge of the mount or cut it close before hand. This gets over the screw holes without paint. I then trim away all but the code area.  The dvd labels are very thin and very sticky...but so far no juice. 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! 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/18135-new-mount-for-zm-25mm-from-zeiss/?do=findComment&comment=201466'>More sharing options...
paisatge Posted June 14, 2007 Share #13 Â Posted June 14, 2007 Even without all the codings, can't I just switch off the lens detection mode and bring up the framelines manually? Is that possible? Link to post Share on other sites More sharing options...
artur5 Posted June 14, 2007 Share #14 Â Posted June 14, 2007 I got the quote for the parts: 28 EUROs plus shipping. I still did not get a final invoice from Zeiss.What kind of mount you are looking for to put on your Zeiss 21mm? Maybe I can sell you one I got off my 25mm? Â Steven, do you have still the old bayonet ring from your ZM25 ? I have a ZM21 and I would like to change the ring. and this one from a ZM25 is what I need to bring 28/90 frame lines. Cheers Arturo. Â P.D.: If you have a Paypal account, it would be easy to make the deal. Link to post Share on other sites More sharing options...
jaapv Posted June 14, 2007 Share #15 Â Posted June 14, 2007 I got the quote for the parts: 28 EUROs plus shipping. I still did not get a final invoice from Zeiss. Â And the screws are 50 cents each, order them at the same time, just in case. Â They went up; I paid 26 Euro last year Link to post Share on other sites More sharing options...
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