pvcaesbroeck Posted June 17, 2014 Share #1 Posted June 17, 2014 Advertisement (gone after registration) Hello M-lovers, I have a question concerning working in "Aperture Priority" mode. ISO: auto (with 3600 as maximum value) Speed: A (with 35mm as lowest value) Aperture: 5.6 (as an example) When I take several pictures in different light conditions, some of them are with aperture 4.8 and other pictures are with 6.8; without me changing the aperture ring that is set on 5.6!! Does that make sense to anyone? Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/229008-m240-aperture-priority-mode-not-consequent/?do=findComment&comment=2612367'>More sharing options...
Advertisement Posted June 17, 2014 Posted June 17, 2014 Hi pvcaesbroeck, Take a look here M240 Aperture priority mode not consequent?. I'm sure you'll find what you were looking for!
mjh Posted June 17, 2014 Share #2 Posted June 17, 2014 The camera doesn’t know which f-stop was selected so it has to guesstimate the aperture by comparing the ambient light to the light falling through the lens. This guesstimation will sometimes be off. (This is how all the digital M models starting with the M8 have handled this, see the FAQ: http://www.l-camera-forum.com/leica-forum/leica-m-type-240/308500-leica-m8-m8-2-m9-m9p-2.html#post2554303.) Link to post Share on other sites More sharing options...
pvcaesbroeck Posted June 17, 2014 Author Share #3 Posted June 17, 2014 Hello Michael, So, even if I set the aperture ring manually on 5.6; the camera system may vary it slightly? Do I understand it correctly? Link to post Share on other sites More sharing options...
andybarton Posted June 17, 2014 Share #4 Posted June 17, 2014 The camera might record it in EXIF slightly differently but cannot change the aperture ever. Link to post Share on other sites More sharing options...
mjh Posted June 17, 2014 Share #5 Posted June 17, 2014 So, even if I set the aperture ring manually on 5.6; the camera system may vary it slightly? No, it does not. The camera neither knows which aperture you have selected, nor can it change that selection – that’s only between you and the lens. But since the camera doesn’t know, it can only guess, and the result is what you see in the metadata. Link to post Share on other sites More sharing options...
jaapv Posted June 17, 2014 Share #6 Posted June 17, 2014 See here: http://bretteville.com/pdfs/M8Metadata_v2.pdf The M8 and M9 are the same in this respect. Link to post Share on other sites More sharing options...
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