Archived posting to the Leica Users Group, 2008/04/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Apr 24, 2008, at 7:49 AM, wildlightphoto@earthlink.net wrote: > Stasys Petravicius <stasys1@cox.net> wrote: > >> Doug- how is the correction accomplished? I have a couple ROM >> lenses. > > On Apr 23, 2008, at 8:57 PM, wildlightphoto@earthlink.net wrote: > >> Stasys Petravicius <stasys1@cox.net> wrote: >> >>> Steve- I'm not sure- but I think you've explained it correctly. My >>> old >>> 60 mm macro has no electrical contacts (like the new R lenses have), >>> and has no bar coding as is being added by some for their M8's. >>> somehow- the EXIF viewer software program pick up the data when you >>> put >>> your image file in to the software file on the monitor. I hope this >>> helps, Stasys >>> On Apr 23, 2008, at 5:33 PM, Steve Barbour wrote: >>> >>>> >>>> On Apr 23, 2008, at 5:18 PM, grduprey@mchsi.com wrote: >>>> >>>>> Stasys, >>>>> >>>>> The M8 does not have any connections in the lenses which can read >>>>> the >>>>> actual aperture used. The R lenses, especially the current ROM >>>>> lenses do have this connection and can read the actual aperture. >>>>> The >>>>> M8 can only read the info in the coding bar to record the max >>>>> aperture, as there is no linkage to tell the actual used aperture. >>>> >>>> so the coding has nothing to do with outcome or photo quality, just >>>> puts the lens into the exif...is that correct? >>>> >>>> >>>> Steve >>> >> >> The DMR can correct for vignetting when the lens has ROM. >> > > I don't know. On another list Robert Stevens demonstrated the > effect with > his 19mm Elmarit-R, I believe with RAW files. the capabilities of the R system ROM DMR corrections are different from those in the M system, with coding etc... apparantly quite different... and must be considered separately.. I have not been able to find Leica's statement of coding and the optical corrections offered for the M system... does anyone have this? Steve > > > Doug Herr > Birdman of Sacramento > http://www.wildlightphoto.com > > > -------------------------------------------------------------------- > mail2web.com - Microsoft? Exchange solutions from a leading provider - > http://link.mail2web.com/Business/Exchange > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information best, Steve "I never wanted to be famous" http://www.blurb.com/bookstore/detail/186890