maccaco Posted August 20, 2012 Share #1 Posted August 20, 2012 Advertisement (gone after registration) Hi all, I have a Nokton 40/1.4 not coded. So I have a question: I need to set the lens detection "ON with UV/IR"?. I think it is not necessary. I use Ligthroom to process my photos and I use the Leica lens correction (in particular the Summicron 35/1.4 which is the default). If I disable the detection lens sure that I win some battery power! Regards Link to post Share on other sites More sharing options...
Advertisement Posted August 20, 2012 Posted August 20, 2012 Hi maccaco, Take a look here Lens detection to Off in Objetive not coded on M8. I'm sure you'll find what you were looking for!
brianv Posted August 20, 2012 Share #2 Posted August 20, 2012 I use the 40/2 Summicron with detection turned off. Never noticed an issue. Detection is more critical for wider lenses, or those with deeply inset rear elements. I use a J-12 3.5cm F2.8 on the M8 without problem, detection turned off. That lens has a large rear element, close to the focal plane. "Not a problem" Link to post Share on other sites More sharing options...
tobey bilek Posted August 20, 2012 Share #3 Posted August 20, 2012 It depends on if you want the camera to record 40 mm in the exif data or not. Also if you use a ir /uv filter to get the correct colors and you wish to have to camera correct the possible resulting cyan/green corners which may or may not be present as a result of the filter. A filter is required on all lenses to get the correct colors, every color, not just black. Link to post Share on other sites More sharing options...
maccaco Posted August 20, 2012 Author Share #4 Posted August 20, 2012 Yes, I use UV/IR filter also, but my question is whether the filter is necessary to set the detection to "On" or "Off". With "Off", I think you can save a little battery since no processing is needed and the diodes nor are permanently emitting light (I do not think you save much but maybe for some photos). As I said before, I do them corrections in post production with the lens correction system of Ligtroom. Regards Link to post Share on other sites More sharing options...
lct Posted August 20, 2012 Share #5 Posted August 20, 2012 I have no clue about energy saving and i have no experience with the CV 40/1.4 but there are no 40mm exif data available for the M8 and your lens brings up the 50mm frame lines IINW. Then there is little to no point in enabling the lens detection if you don't code your 40/1.4 as a 35mm lens and if you don't file its flange to bring up 35mm frame lines IMHO. Link to post Share on other sites More sharing options...
jaapv Posted August 21, 2012 Share #6 Posted August 21, 2012 Anyway, setting the lens detection to "off" is mostly not needed. If the camera does not detect the lens through lack of (or wrong) coding it simply does not react. The only time the detection must be set to "off" is the extremely rare case that an uncoded lens has a screw in the wrong place that leads to a false detection. Note: Uncoded 90 mm lenses may have a screw in the right place to be detected correctly. It is the first time I have heard the battery saving argument and I very much doubt that it makes any discernable difference. Link to post Share on other sites More sharing options...
lct Posted August 21, 2012 Share #7 Posted August 21, 2012 Advertisement (gone after registration) Setting the lens detection to "On" or "On + UV/IR" will do nothing if the OP does not code the lens for sure but will cause the camera react if the OP does not file the lens and code it as a 50mm, or file it and code it as a 35mm IMHO. Link to post Share on other sites More sharing options...
jaapv Posted August 21, 2012 Share #8 Posted August 21, 2012 Sorry, you lost me there. Link to post Share on other sites More sharing options...
lct Posted August 21, 2012 Share #9 Posted August 21, 2012 I made it unclear i guess, sorry. The CV 40/1.4 has a 50mm flange presumably, then if you don't file the latter and code the lens as a 50/1.4 for instance, setting the lens detection to "On" or "On + UV/IR" will cause the camera react as if it were a Summilux 50 actually, right? But if you file the lens to bring up 35mm frame lines and code it as a 35/1.4, the camera will react as if it were a Summilux 35, OK? Link to post Share on other sites More sharing options...
Erik Gunst Lund Posted August 21, 2012 Share #10 Posted August 21, 2012 Ict talking about frame lines need to correspond to 6bit code Link to post Share on other sites More sharing options...
lct Posted August 21, 2012 Share #11 Posted August 21, 2012 Yes of course failing which the camera will do nothing or will register the lens as an "uncoded" one more precisely. Link to post Share on other sites More sharing options...
maccaco Posted August 21, 2012 Author Share #12 Posted August 21, 2012 The battery saving is speculative. Just doing the course that is not consumed leds turned on all time and nor is there software processing. I guess the less processings more energy savings (I do not know how). Regards. Link to post Share on other sites More sharing options...
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