Guest V64 Posted March 21, 2007 Share #1 Posted March 21, 2007 Advertisement (gone after registration) I am trying to code a CV 15/4.5 and a Zeiss 25mm Biogon. I have had no success - so I am looking for advice! I had no success at all on the Biogon, no recognition at all (code 26). The CV 15 on an old style Leica 135mm mount, whose 'face' is part brass and part plate.Latest 1.092 firmware. I coded a leica 35mm 'cron V4 (code 6) successfully so I thought I would start from there. The CV (with code 6) is seen as 90mm with the frame selector in the 28/90 position, that is the camera is seeing one of the codes 4,7,37,38,39 (in binary 000100, 000111, 100101, 100110, 100111). No code seen with the frame selector in the other positions. I tried both the Template and the 'mark the camera mount and then the rim of the mounted lens techniques, both with the same result. With so many ways to get it wrong (wrong black pen, no white pen, wrong angular position, dodgy lens sensor strip etc.) I would like to hear about how other forum members experiences and how they succeeded. My first reaction is use a white marker (but which one - nail varnish or Pentel style art pigment paint - or what?). thank-you for any advice you can offer David Huxtable Link to post Share on other sites More sharing options...
Advertisement Posted March 21, 2007 Posted March 21, 2007 Hi Guest V64, Take a look here Lens Hand Coding advice required. I'm sure you'll find what you were looking for!
steich Posted March 21, 2007 Share #2 Posted March 21, 2007 Hi David, I have coded my CV15 as a WATE. I use the Leitz 9 cm adapter- and M8 shows the lens as "18mm", which is pretty close to reality. Maybe with FW 1.10 we have the choice which WATE focal length to choose, so one could then select the 16mm . I have the 13,5 mm adapter, too, but the brass was quite dark from the age- so the M8´s sensors obviously just saw "black". It ´s much better now after I cleaned it with a cream I mixed after a recipe in the German part of the Internet. 1 tsp fine wheat flour 1 tsp salt fill up slowlywith vinegar until it is creamy. spread on the brass part, let dry for 30-60 minutes. Peel off with your fingers, rub clean with a cloth. Then take a dry old toothbrush, NO water and a bit of toothpaste, rub on the brass part gently, then rub clean with a cloth again. Repeat if needed. Good luck! Stefan Link to post Share on other sites More sharing options...
cbretteville Posted March 21, 2007 Share #3 Posted March 21, 2007 Stefan, Thanks for sharing that recipy. It will come in handy. - Carl Link to post Share on other sites More sharing options...
Shootist Posted March 21, 2007 Share #4 Posted March 21, 2007 I've tried to hand code sevral lenses and never had any luck getting it to work. Some have done it with no problem but not me. I even made my own template using a photo of the mount from a coded lens. I'm think the bar on the camera lens mount is slightly different on different camera, manufacturering dates, and that is why some do it first time and other, like me. can't get it to work no matter what they try. Link to post Share on other sites More sharing options...
robertwright Posted March 21, 2007 Share #5 Posted March 21, 2007 it took me over twenty attempts to get my 21 elmarit and 28 elmarit coded, and in the end I what worked for me was a piece of a dvd label with the marks made in sharpie. I think the white of the label helps. The sticker is only about an inch in length so it does not make the lens too hard to attach. I know a lot of people on the forum will think that heresy to mess with the alignment of the lens but honestly if you can show me the difference .015" makes then I will spend the 300 to get them coded. At least for now. I found the sharpie on the mount itself kept coming off too easily. Link to post Share on other sites More sharing options...
LJL Posted March 21, 2007 Share #6 Posted March 21, 2007 I am trying to code a CV 15/4.5 and a Zeiss 25mm Biogon. I have had no success - so I am looking for advice! I had no success at all on the Biogon, no recognition at all (code 26). thank-you for any advice you can offer David Huxtable David, With respect to the Zeiss 25/2.8 Biogon, you may first have to change out the lens mount ring so that it registers and brings up the 24/35 framelines in the M8 viewfinder. The present mount ring brings up the 28mm framelines, and apparently there is some conflict with being able to code 24mm on the 28mm mount. I have also tried unsuccessfully several times. I did contact Zeiss directly about the lens mount and they will do the swap in Germany for 60euros plus shipping. They also do sell the lensmount ring to be swapped out for 25euros plus. They do not recommend user swapping, talking about the need for proper alignment and such, but there are only four screws and the mount seems to register properly. (I have not done this myself yet, but am contemplating it.) The last issue is around covering up the screw head where one of the blalck marks needs to be made, or where a white mark is now reading a black mark possibly. A suggestion has been to paint the entire section of the mount, including the screw head with an opaque white paint and then adding the black coding points in proper position on top of the white base coat. Again, I have not gotten this far myself, but that is looking liike the path to take, unless something else comes up that works better. I think one of the bigger concerns is how thick any of the paint coats or tapes are, as they may interfere with proper mounting distances for register, as well as possibly wear off rather quickly. Any superthin white tape may be a better choice. Just some suggestions to consider. LJ Link to post Share on other sites More sharing options...
robertwright Posted March 21, 2007 Share #7 Posted March 21, 2007 Advertisement (gone after registration) the reason I went with dvd labels was that they were so thin, and designed to stick pretty well and not come off in your computer. I have only had them on a few days, and so far they are fine. I would rather see something not made of paper, like perhaps a p-touch label, but I don't know how thick that film is. Decal film is very thin, but it would need to be protected with some sort of flat varnish. I did notice that the mounts on my elmarits (both used) are not as tight as my newer cron asph 35, which I tried to code in the same way but found mounting was too stiff. Fortunately, there really is no need to code the 35. Link to post Share on other sites More sharing options...
Guest V64 Posted March 21, 2007 Share #8 Posted March 21, 2007 Robert, I like the idea of a DVD Label - did you use the normal kind of 'paper' label as sold by Verbatim or Avery, or one made from a different material? But I fear that my Leica Mount is very, very tight so this may not be an option. Thank-you for your suggestion David Link to post Share on other sites More sharing options...
Guest V64 Posted March 21, 2007 Share #9 Posted March 21, 2007 LJ, I tried to code the 25mm Biogon as a 28mm F2 ASPH (code 26) - which is the code in Carsten's table, and used by Sean Reid. Thank-you for info about Zeiss spares I am looking into that possibility - it would seem that both White and Black paint is required (although I didnt need white paint to code the 35mm'cron). Hopefully someone can suggest the correct type of paint to use - one that wears well and does not stick (irretrievably) to the Red Diode strip in the mount. It does seem to be hit and miss. David Link to post Share on other sites More sharing options...
Artichoke Posted March 21, 2007 Share #10 Posted March 21, 2007 using DVD tape it gets ripped during the mounting on my lenses, sad to report I got a Sharpie code to work once on my 75 Lux, but it wore off & I have not been able to repeat my early success I waste too much time trying to bring up a code it would be nice if Leica would allow local dealers to do this, rather than sending a lens into Solms which is overwhelmed with demand on their techs it cannot be all that challenging an operation Link to post Share on other sites More sharing options...
LJL Posted March 21, 2007 Share #11 Posted March 21, 2007 LJ, I tried to code the 25mm Biogon as a 28mm F2 ASPH (code 26) - which is the code in Carsten's table, and used by Sean Reid. Thank-you for info about Zeiss spares I am looking into that possibility - it would seem that both White and Black paint is required (although I didnt need white paint to code the 35mm'cron). Hopefully someone can suggest the correct type of paint to use - one that wears well and does not stick (irretrievably) to the Red Diode strip in the mount. It does seem to be hit and miss. David David, Got it. I was not thinking about the coding numbers....sorry. I tried doing the 24/2.8 on mine and that just would not work. I have not tried the 28/2.8, figuring that the wider angle of the 25 may need more correction. Not really sure that is true, as the 25/2.8 does not seem to have too much vignetting in stuff I have shot. The specific Zeiss 35mm mount is part # 1460-875 and costs 26 euros (sorry for earlier quote of 25 ) There are also a set of four new screws as part # 1460-876 for 0.5 euros, plus shipping and they said VAT, but that should not apply for US shipments. (PM if you want more info that I just received from them the other day.) LJ Link to post Share on other sites More sharing options...
robertwright Posted March 21, 2007 Share #12 Posted March 21, 2007 well so far the dvd labels are working for me, but I do notice that the mounts of my elmarits are pretty loose so that might be the case why. In the case of my 28elmarit there was a screw right in the coding area which is why I think the tape works. In the case of the 21 I think the white helps because the black bars are so close together they don't register as distinct otherwise. some out there with a p-touch labeler want to give it a go? the labels I have are paper. Link to post Share on other sites More sharing options...
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