volkerhopf Posted September 29, 2007 Share #1 Posted September 29, 2007 Advertisement (gone after registration) Hi, I was wondering what the M8 does when the setting is "On UV+IR" but the lens is not coded. Does anybody know? Thanks and regards Volker Link to post Share on other sites More sharing options...
Advertisement Posted September 29, 2007 Posted September 29, 2007 Hi volkerhopf, Take a look here No coding but On UV+IR. I'm sure you'll find what you were looking for!
carstenw Posted September 29, 2007 Share #2 Posted September 29, 2007 Well, since it doesn't know what lens is on there (assuming that there is no screw in that area to fool the camera), it cannot apply corrections of any kind, so it presumably just leaves it as if the setting was off. Link to post Share on other sites More sharing options...
stunsworth Posted September 29, 2007 Share #3 Posted September 29, 2007 It depends on the lens. For the longer lenses it won't be a problem. I have an un-coded Voigtlander 90mm lens. On a recent trip to France the lens wasn't recognised by the camera on most frames and everything was ok. For a few frames the camera thought the lens was a 21mm or 24mm lens and corrected accordingly. Not pretty <grin>. Link to post Share on other sites More sharing options...
jaapv Posted September 29, 2007 Share #4 Posted September 29, 2007 As long as the camera is not fooled into thinking it recognizes a lens, rather nothing will happen. Link to post Share on other sites More sharing options...
volkerhopf Posted September 29, 2007 Author Share #5 Posted September 29, 2007 It depends on the lens. For the longer lenses it won't be a problem. I have an un-coded Voigtlander 90mm lens. On a recent trip to France the lens wasn't recognised by the camera on most frames and everything was ok. For a few frames the camera thought the lens was a 21mm or 24mm lens and corrected accordingly. Not pretty <grin>. Steve, did it actually show 21 or 24 although there was no coding? Link to post Share on other sites More sharing options...
grduprey Posted September 30, 2007 Share #6 Posted September 30, 2007 I have my M8 on UV/IR and coding all the time, and have not seen any effect on the imaging capabilities. I have only one coded lens, but use filters on all. Gene Link to post Share on other sites More sharing options...
stunsworth Posted September 30, 2007 Share #7 Posted September 30, 2007 Advertisement (gone after registration) Volker, yes it showed in the Exif. I think the problem may be caused by the fact that it was a Voigtlander 90mm with a Voigtlander adaptor. I think that the cut out on these allows light to strike the sensor, and occasionally this makes the camera think that a coded lens is mounted. Link to post Share on other sites More sharing options...
Paul_S Posted September 30, 2007 Share #8 Posted September 30, 2007 It depends on the lens. For the longer lenses it won't be a problem. I have an un-coded Voigtlander 90mm lens. On a recent trip to France the lens wasn't recognised by the camera on most frames and everything was ok. For a few frames the camera thought the lens was a 21mm or 24mm lens and corrected accordingly. Not pretty <grin>. Besides correcting vignetting (detection: ON or ON+UV/IR) and color cast caused by the IR cut filter (ON+UV/IR), does the ON+UV/IR camera setting also shift the white balance. The WB shift is independent of the lens attached, detected or not (but is depending on the WB value set or determined). If you have an uncoded lens with IR cut filter, you would like to use the ON+UV/IR setting for the WB shift. However, for an uncoded lens you would prefer the OFF setting to prevent wrong detection as stunsworth explained. To summarize, I prefer lens coding for any lens with IR cut filter, or I have to accept unpredictable (=undesirable in my book) results. Link to post Share on other sites More sharing options...
volkerhopf Posted September 30, 2007 Author Share #9 Posted September 30, 2007 Volker, yes it showed in the Exif. I think the problem may be caused by the fact that it was a Voigtlander 90mm with a Voigtlander adaptor. I think that the cut out on these allows light to strike the sensor, and occasionally this makes the camera think that a coded lens is mounted. Hi Steve that is interesting. I had tthe opposite effect with a Voigtlaender adapter, it did not see the manual coding until I put my finger in front of the cut out. Both problems should then be solved with the new VC II adapters. Link to post Share on other sites More sharing options...
nielsb Posted October 1, 2007 Share #10 Posted October 1, 2007 Both problems should then be solved with the new VC II adapters. VCII adapters; when, where and how??? Niels Link to post Share on other sites More sharing options...
volkerhopf Posted October 1, 2007 Author Share #11 Posted October 1, 2007 Hi Niels, there was a thread by Sean Read about these adapters a few days ago. They can be bought from Cameraquest. Volker Link to post Share on other sites More sharing options...
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