colorflow Posted March 21, 2007 Share #1 Posted March 21, 2007 Advertisement (gone after registration) This may have been discussed before but I could not find a thread on it. Do the Lux 75 and the Cron APO90 benefit from coding? Thanks, Alan Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted March 21, 2007 Share #2 Posted March 21, 2007 Alan i am shooting them both uncoded and really there is no need except for the EXIF data. There are no Cyan problems with the long stuff, i may do it just for sport but at this point with the firmware we don't need too. Now with the flash setup it may help there with Leica M flash setup Link to post Share on other sites More sharing options...
sean_reid Posted March 22, 2007 Share #3 Posted March 22, 2007 Exactly...It could be helpful for TTL flash work, etc. but there's no real cyan drift to deal with. The same is mostly true for the 50s. Cheers, Link to post Share on other sites More sharing options...
colorflow Posted March 22, 2007 Author Share #4 Posted March 22, 2007 Thanks Guy and Sean. I'll leave them alone since I probably will not ever use flash with these two focal lengths. Alan Link to post Share on other sites More sharing options...
robsteve Posted March 22, 2007 Share #5 Posted March 22, 2007 The coding also corrects for plain old lens vignetting. Probably not needed for the 90mm APO, but the 75mm summilux has a bit of vignetting. Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted March 22, 2007 Share #6 Posted March 22, 2007 Yea it is kind of waste of money, we have enough other stuff to spend money on. Link to post Share on other sites More sharing options...
colorflow Posted March 22, 2007 Author Share #7 Posted March 22, 2007 Advertisement (gone after registration) The coding also corrects for plain old lens vignetting. Probably not needed for the 90mm APO, but the 75mm summilux has a bit of vignetting. I thought the coding only corrects for sensor vignetting due to the obtuse angle of the lens hitting the sensor micro-lens? and in the case of the longer lenses this angle isn't very obtuse especially with the 1.33 cropping. Alan Link to post Share on other sites More sharing options...
robsteve Posted March 22, 2007 Share #8 Posted March 22, 2007 I thought the coding only corrects for sensor vignetting due to the obtuse angle of the lens hitting the sensor micro-lens? and in the case of the longer lenses this angle isn't very obtuse especially with the 1.33 cropping. Alan I see vignette correction with my coded Noctilux. The DMR does the same thing with ROM lenses, correct the lens vignette, no matter if it is sensor related or lens design related. To be clear, coding corrects for vignetting no matter whether it is lens related or sensor related. Link to post Share on other sites More sharing options...
johnkuo Posted March 22, 2007 Share #9 Posted March 22, 2007 The only thing with partially coded set of lenses is that you have to remember to turn lens detection on and off, and I imagine that gets very tiring very quickly. Link to post Share on other sites More sharing options...
jaapv Posted March 22, 2007 Share #10 Posted March 22, 2007 The only thing with partially coded set of lenses is that you have to remember to turn lens detection on and off, and I imagine that gets very tiring very quickly. In theory, that is. In practice, my camera's are set to "lens detection" all the time and nothing ontoward has happened yat. Link to post Share on other sites More sharing options...
haika Posted March 22, 2007 Share #11 Posted March 22, 2007 The only thing with partially coded set of lenses is that you have to remember to turn lens detection on and off, and I imagine that gets very tiring very quickly. hm, i leave lens detection on all the time, although my standard lens, the lux 35, is not coded. could there be a problem with detection on and uncoded lenses? servus, günter Link to post Share on other sites More sharing options...
scott kirkpatrick Posted March 22, 2007 Share #12 Posted March 22, 2007 No problem leaving lens detection on. An uncoded lens is recognized as having the code '000000' and this brings up the tag "uncoded," followed by no further action. scott Link to post Share on other sites More sharing options...
johnkuo Posted March 22, 2007 Share #13 Posted March 22, 2007 Thanks for the tips. I recall reading about Leica recommending to turn it off for non-coded lenses, but apparently it's not an issue. Link to post Share on other sites More sharing options...
carstenw Posted March 22, 2007 Share #14 Posted March 22, 2007 It is only an issue when either the metal is dark due to age or heavy use, or there is a screwhole over the sensor. In these cases, an incorrect lens may be "detected" and an improper adjustment applied. You could test all your lenses to be sure that they are not recognized as anything wrong. Link to post Share on other sites More sharing options...
steich Posted March 22, 2007 Share #15 Posted March 22, 2007 As I mentioned in another thread, the M8 recognizes my old 2/90 ´cron as "90mm". Seems to have a screwhole at the right place to pretend it´s a Tele-Elmarit 2.8/90 ;-))) Stefan Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted March 22, 2007 Share #16 Posted March 22, 2007 It is only an issue when either the metal is dark due to age or heavy use, or there is a screwhole over the sensor. In these cases, an incorrect lens may be "detected" and an improper adjustment applied. You could test all your lenses to be sure that they are not recognized as anything wrong. That's exactly what leica told me and the reason they recommend turning it off Link to post Share on other sites More sharing options...
sean_reid Posted March 22, 2007 Share #17 Posted March 22, 2007 It is only an issue when either the metal is dark due to age or heavy use, or there is a screwhole over the sensor. In these cases, an incorrect lens may be "detected" and an improper adjustment applied. You could test all your lenses to be sure that they are not recognized as anything wrong. Exactly. Cheers, Sean Link to post Share on other sites More sharing options...
jaapv Posted March 22, 2007 Share #18 Posted March 22, 2007 In which case a drop of white correction fluid does wonders Link to post Share on other sites More sharing options...
bsmith Posted March 22, 2007 Share #19 Posted March 22, 2007 If your lens is focusing correctly, (especially the nocts and luxes) I would suggest to NOT send it in for coding. I've heard of too many lens with focus problems after coding. Link to post Share on other sites More sharing options...
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