philcycles Posted May 2, 2014 Share #1 Posted May 2, 2014 Advertisement (gone after registration) It seems that lens coding and getting the camera to recognize what lens is attached is a big deal. Why? None of my lenses or adapters is encoded and I seem to be able to take perfectly good pictures. What am I missing? Link to post Share on other sites More sharing options...
Advertisement Posted May 2, 2014 Posted May 2, 2014 Hi philcycles, Take a look here Why does the camera need to know what lens is attached?. I'm sure you'll find what you were looking for!
Jeff S Posted May 2, 2014 Share #2 Posted May 2, 2014 Two potential benefits….automatic recognition by camera of lens used, which will be included in EXIF data, and correction for some edge issues such as vignetting, which may help primarily with lenses wider than 35 or 50. Many folks don't care, especially for lenses 50mm or longer, except for EXIF. The fact that some M models allow for manual identification of lenses is another consideration for some, while others prefer not to have to remember to do that. Jeff Link to post Share on other sites More sharing options...
swamiji Posted May 2, 2014 Share #3 Posted May 2, 2014 We mustn't forget the flash! The SF58 uses lens information to adjust for the width of the flash. It's adjusted mechanically in the head, Link to post Share on other sites More sharing options...
Herr Barnack Posted May 2, 2014 Share #4 Posted May 2, 2014 My Leica dealer told me it was to fine tune for vignetting and exposure. I asked him about six-bit coding as one of my lenses is coded but the rest are not. He said it makes no difference to the camera if it learns which lens is attached via six bit coding or manual selection in the lens menu. The only real difference is that if your lens is not coded, it takes a few seconds to manually inform the camera which lens is attached. That's not a big deal to me, as I seldom change lenses in the middle of shooting a given subject or scene. Link to post Share on other sites More sharing options...
dugby Posted May 3, 2014 Share #5 Posted May 3, 2014 We mustn't forget the flash! The SF58 uses lens information to adjust for the width of the flash. It's adjusted mechanically in the head, This is also applicable with other SCA 3502-M5 equipped flashes such as my Metz MZ40-3i The main flash head zooms according to which lens is detected by the M Link to post Share on other sites More sharing options...
Jeff S Posted May 3, 2014 Share #6 Posted May 3, 2014 My Leica dealer told me it was to fine tune for vignetting and exposure. For 'generic' vignetting, as the M doesn't know the aperture used, even with coding. And while the camera doesn't need to know, the user might like the additional EXIF data. Jeff Link to post Share on other sites More sharing options...
jcraf Posted May 4, 2014 Share #7 Posted May 4, 2014 Advertisement (gone after registration) That's not a big deal to me, as I seldom change lenses in the middle of shooting a given subject or scene. I do tend to change lenses during a shoot. Most of my 'wides' are coded, but my f1 Noct and longer lenses aren't I usually remember to code manually via the menu, but sometimes I might forget and so my uncoded 90 Apo might appear in the EXIF data as a 21mm f2.8 Asph. No problem. But I assume the camera will still apply its 21mm correction algorithm to the 90mm image?. I wonder if there would be any noticeable effect? - can't say I've ever noticed on the rare occasions that I've been dumb enough to forget....... Link to post Share on other sites More sharing options...
leica lux Posted May 7, 2014 Share #8 Posted May 7, 2014 ...The only real difference is that if your lens is not coded, it takes a few seconds to manually inform the camera which lens is attached. That's not a big deal to me, as I seldom change lenses in the middle of shooting a given subject or scene. I always forget to switch back :/ I wish I could have all my lenses coded.. Link to post Share on other sites More sharing options...
haroldp Posted May 15, 2014 Share #9 Posted May 15, 2014 For 'generic' vignetting, as the M doesn't know the aperture used, even with coding. And while the camera doesn't need to know, the user might like the additional EXIF data. Jeff I use M9 rather than 240, but the m9 uses its ambient light sensor (white balance) to compare to photo sensor and 'guess' an f-stop (more accurately t-stop) in the exif . It is even correct sometimes. .... H Link to post Share on other sites More sharing options...
250swb Posted May 17, 2014 Share #10 Posted May 17, 2014 leica lux if these are your lenses, Summilux 50/1.4 | Summilux 35/1.4 ASPH. FLE | Zeiss Biogon T* 2,8/21 ZM, I don't see why you can't code them. I'd have thought the 35 would be coded anyway. But has the Biogon got a shallow groove machined into the face of the mount, that's for putting a dab of paint in to code it. The Summilux can be sent to Leica for coding, or you can code it yourself with a Dremel, or buy a replacement mounting flange from Ebay, and these do often work. Steve Link to post Share on other sites More sharing options...
CheshireCat Posted May 26, 2014 Share #11 Posted May 26, 2014 None of my lenses or adapters is encoded and I seem to be able to take perfectly good pictures. What am I missing? An ultra-wide lens Link to post Share on other sites More sharing options...
jaapv Posted May 26, 2014 Share #12 Posted May 26, 2014 I use M9 rather than 240, but the m9 uses its ambient light sensor (white balance) to compare to photo sensor and 'guess' an f-stop (more accurately t-stop) in the exif . It is even correct sometimes. .... H Nothing to do with white balance. Only the Digilux2 has an external light balance meter. Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.