Denise Amon Posted January 21, 2021 Share #1 Posted January 21, 2021 Advertisement (gone after registration) Hello, I remember coming across an information mentioning that the Leica lens Noctilux-M 1:0,95/50 MM ASPH opens even wider than f/0,95 and that for some reason they decided to market it as f/0,95. I do not recall if it was in an interview, a review, an article, or a video. I did some research but was not able to retrieve the source of that information. I may be wrong, but if anyone else heard or read about it, could you please send me the link to the information? Thanks a lot in advance! Link to post Share on other sites More sharing options...
Advertisement Posted January 21, 2021 Posted January 21, 2021 Hi Denise Amon, Take a look here Noctilux-M 1:0,95/50 MM ASPH. I'm sure you'll find what you were looking for!
jaapv Posted January 21, 2021 Share #2 Posted January 21, 2021 I have no specific information on this lens, but in general there are many lenses where the aperture opens beyond the widest stop mechanically. It never increases the maximum light transmission though, as the light flow is restricted by the diameter of the lens elements. Link to post Share on other sites More sharing options...
jdlaing Posted January 21, 2021 Share #3 Posted January 21, 2021 16 minutes ago, jaapv said: I have no specific information on this lens, but in general there are many lenses where the aperture opens beyond the widest stop mechanically. It never increases the maximum light transmission though, as the light flow is restricted by the diameter of the lens elements. Or the diameter of the lens barrel. Link to post Share on other sites More sharing options...
jaapv Posted January 21, 2021 Share #4 Posted January 21, 2021 3 minutes ago, jdlaing said: Or the diameter of the lens barrel. Yes - that should be about the same, otherwise the lens would be a bit rattly 1 Link to post Share on other sites More sharing options...
jdlaing Posted January 21, 2021 Share #5 Posted January 21, 2021 2 hours ago, jaapv said: Yes - that should be about the same, otherwise the lens would be a bit rattly Not entirely. Example: 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! 1 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/317206-noctilux-m-109550-mm-asph/?do=findComment&comment=4122588'>More sharing options...
jaapv Posted January 21, 2021 Share #6 Posted January 21, 2021 Draw in the light rays They are constricted by the lens element/mount interface.. The barrel holds the optical cell, but does not interfere with the light. The rear exit, if too narrow, will cause vignetting, but no f-stop shift. Link to post Share on other sites More sharing options...
Denise Amon Posted January 22, 2021 Author Share #7 Posted January 22, 2021 Advertisement (gone after registration) Thank you very much for the explanations! Link to post Share on other sites More sharing options...
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