MediaFotografie Posted December 6, 2015 Share #1 Posted December 6, 2015 Advertisement (gone after registration) ..there is one SL behaviour which I don't understand: the sensor of SL has basis ISO 100 (like the Q); ISO 50 is only "pulled". But if so, why does Auto ISO uses ISO 50 as default? Wouldn't be ISO 100 better??? Quote Link to post Share on other sites More sharing options...
Advertisement Posted December 6, 2015 Posted December 6, 2015 Hi MediaFotografie, Take a look here Basis-ISO and Auto-ISO. I'm sure you'll find what you were looking for!
elopezso Posted December 6, 2015 Share #2 Posted December 6, 2015 I noticed that also and loose for an answer in the manual but couldn't find one. Hmmmmm Here is another quirky item in the SL that I can't figure out: I take a photo vertically as opposed to horizontally. I press playback. Why does it show up on the screen or lcd so I can't view it while I hold the camera in horizontal mode and instead have to rotate the camera to vertical mode to view it? Quote Link to post Share on other sites More sharing options...
ramarren Posted December 6, 2015 Share #3 Posted December 6, 2015 (edited) I don't know why they chose to run AutoISO from 50 rather than 100, but I see no downside from doing so in any practical terms. I've compared ISO 50 vs ISO 100 results ... they're so close to absolutely identical it makes no difference to me. Regards the image rotation ... They record the orientation but didn't implement the rotation in review on the SL display screen. An omission ... I'd file that as an enhancement request: "Please add an option to auto-rotate images to fit the display orientation in review." While it's convenient, I generally end up rotating my cameras that do it so I can see verticals imaged larger anyway. I guess it makes sense to do it if the camera is connected via HDMI to a television for display purposes... I wonder if it rotates them then? I'll have to try it. Edited December 6, 2015 by ramarren Quote Link to post Share on other sites More sharing options...
hydet Posted December 6, 2015 Share #4 Posted December 6, 2015 I hope this isn't completely off topic, but am assuming that ISO is available in full stops increments only; I have been unable to find a way to make 1/3 stop adjustments, something I miss a lot. Am I overlooking something? Thanks. Quote Link to post Share on other sites More sharing options...
digitalfx Posted December 6, 2015 Share #5 Posted December 6, 2015 Generally this only occurs when using very fast lenses in daylight, I find it helpful to drop to ISO 50 when shooting the Noctilux, it sometimes makes the difference between shooting wide open or not. Otherwise I rarely see ISO 50 come up in normal shooting. Regardless Leica should have given us the option to limit minimum ISO. Quote Link to post Share on other sites More sharing options...
satijntje Posted December 6, 2015 Share #6 Posted December 6, 2015 I can confirm that the 50ISO is popping up regularly. Was using a Summicron 50mm APO, and it was not that sunny today. Used the SL in "A"mode, not very useful as shooting times went up to 1/60s! Will not use the AutoISO in future anymore and fix it to 200 or 400. Strange but true John Quote Link to post Share on other sites More sharing options...
digitalfx Posted December 6, 2015 Share #7 Posted December 6, 2015 Advertisement (gone after registration) well there is no reason why we shouldn't have a minimum ISO option. Must be an oversight. 2 Quote Link to post Share on other sites More sharing options...
satijntje Posted December 6, 2015 Share #8 Posted December 6, 2015 (edited) Here is the proof: ISO 64! and 1/60s. If on manual mode I would have set it to ISO 200 and a more reasonable aperture time. Work to be done by Leica, or is this a user mistake? John 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! Edited December 6, 2015 by satijntje Quote 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/254027-basis-iso-and-auto-iso/?do=findComment&comment=2943997'>More sharing options...
ramarren Posted December 6, 2015 Share #9 Posted December 6, 2015 I hope this isn't completely off topic, but am assuming that ISO is available in full stops increments only; I have been unable to find a way to make 1/3 stop adjustments, something I miss a lot. Am I overlooking something? Thanks. Manually set ISOs are in full stop increments. AutoISO steps ISO in one-third stop increments. Quote Link to post Share on other sites More sharing options...
digitalfx Posted December 6, 2015 Share #10 Posted December 6, 2015 I have my camera set to 1:2 for shutter speed as I find anything below 1/125 is slightly soft. Since I switched this setting my images are significantly sharper. Also I tend to shoot in M mode (with auto ISO) with shutter set around 1/400...I think for these reasons I rarely see ISO 50 unless I am on the Noctilux wide open. 1 Quote Link to post Share on other sites More sharing options...
tom0511 Posted December 6, 2015 Share #11 Posted December 6, 2015 Here is the proof: ISO 64! and 1/60s. If on manual mode I would have set it to ISO 200 and a more reasonable aperture time. Work to be done by Leica, or is this a user mistake? John you can set the "longest" exposure time for auto iso in the SL. I often set it to 1/250 since my kids move to fast. Quote Link to post Share on other sites More sharing options...
mjh Posted December 6, 2015 Share #12 Posted December 6, 2015 I can confirm that the 50ISO is popping up regularly. Yep, and I have failed to find any downside so far. I’ve never seen a reason to specify a lower ISO limit and I don’t see a reason to add it to the SL. Quote Link to post Share on other sites More sharing options...
mjh Posted December 6, 2015 Share #13 Posted December 6, 2015 Here is another quirky item in the SL that I can't figure out: I take a photo vertically as opposed to horizontally. I press playback. Why does it show up on the screen or lcd so I can't view it while I hold the camera in horizontal mode and instead have to rotate the camera to vertical mode to view it? Incidentally that is the setting I happen to prefer anyway as it ensures the images are displayed at the display resolution. I much rather rotate the camera than accept viewing the images at half the resolution. Quote Link to post Share on other sites More sharing options...
MediaFotografie Posted December 7, 2015 Author Share #14 Posted December 7, 2015 Yep, and I have failed to find any downside so far. I’ve never seen a reason to specify a lower ISO limit and I don’t see a reason to add it to the SL. I think it becomes more difficult in P mode. Assuming we had the upcomming Summilux-SL. The SL changes ISO after all other values, so we get most images at f 1,4 and ISO 50 - I don't think, that's the best way. Quote Link to post Share on other sites More sharing options...
ramarren Posted December 7, 2015 Share #15 Posted December 7, 2015 (edited) I think it becomes more difficult in P mode. Assuming we had the upcomming Summilux-SL. The SL changes ISO after all other values, so we get most images at f 1,4 and ISO 50 - I don't think, that's the best way. For that situation, I would expect to use Program Shift, but I don't know whether that works the way I think it does. I almost never use Program mode on any camera ... Edited December 7, 2015 by ramarren Quote Link to post Share on other sites More sharing options...
Jared Posted December 7, 2015 Share #16 Posted December 7, 2015 Depending on the sophistication of the algorithm this might not be a bad thing. As long as highlights aren't clipped in the image--as long as there was enough dynamic range to cover the scene--a pull ISObwill technically have a better signal to noise ratio since the shot noise will be lower. If the camera is only using the pull ISO when it either can't get a fast enough shutter speed for correct exposure at ISO 100 or when the dynamic range of the scene is low enough to be completely covered by the camera, using ISO 50 would result in technically the best image. Is this the situation? Or is it just treating 50 as the base ISO? - Jared Quote Link to post Share on other sites More sharing options...
wlaidlaw Posted December 7, 2015 Share #17 Posted December 7, 2015 Another firmware "featurette" hopefully on the list for correction. Wilson Quote Link to post Share on other sites More sharing options...
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