kimaldis Posted April 9, 2018 Share #1 Posted April 9, 2018 Advertisement (gone after registration) I'm wondering, has anyone had instances where two takes of the same subject, same framing, same manual exposure settings but with auto SIO taken within a couple of seconds of each other are taken with very different iso values. It's not happening a lot and at first I put it down to imagination but it's happened enough now that I'm pretty sure it's real. I wondered, maybe, if sometimes it takes a bit of a while for the ISO to adjust and it's firing before the change has been made. Or something. Link to post Share on other sites More sharing options...
Advertisement Posted April 9, 2018 Posted April 9, 2018 Hi kimaldis, Take a look here Same settings, same subject, same framing, variable exposure. I'm sure you'll find what you were looking for!
Anthonytc Posted April 9, 2018 Share #2 Posted April 9, 2018 I will be keen to hear response as I don't have an answer. Link to post Share on other sites More sharing options...
a.noctilux Posted April 9, 2018 Share #3 Posted April 9, 2018 What's the lighting ? If artificial light, maybe the flicker not seen by eyes can be measure by the cell (adjusted in fraction of second). Spreed of Auto Iso set by the M10 ? 1 Link to post Share on other sites More sharing options...
kimaldis Posted April 12, 2018 Author Share #4 Posted April 12, 2018 (edited) What's the lighting ? If artificial light, maybe the flicker not seen by eyes can be measure by the cell (adjusted in fraction of second). Daylight. The lighting is constant. Yes, Auto ISO, manual shutter and, obviously, aperture. Edited April 12, 2018 by kimaldis Link to post Share on other sites More sharing options...
a.noctilux Posted April 12, 2018 Share #5 Posted April 12, 2018 Mystery of AUTO ISO. As old long time film (slides mainly) user, I've never rely on Auto Iso (appeared on M since M9 is nice for "peace of mind use", but I'm not there). I need to control what my pictures would render, so I manual set "every thing to render what I want". Rely on automation is good but not for me, manual set ISO is something part of my picture control ( "grain on film", pixel noise on sensor and so on), as can be choosing parameters for aperture/speed/focus settings. To master those parameters, you may set yourself ISO, and not worry about "automated settings by the camera intelligence" (which in this case is variable). Your ISO use may differ from me of course, but that's fine. 1 Link to post Share on other sites More sharing options...
enboe Posted April 12, 2018 Share #6 Posted April 12, 2018 When using classic metering, the exposure takes a second or so to settle when freshly turned on. 1 Link to post Share on other sites More sharing options...
Flu Posted April 12, 2018 Share #7 Posted April 12, 2018 Advertisement (gone after registration) Are you shooting RF or live view or a mix of both. If using LV, do you punch in with the magnifier to achieve critical focus and take the shot during magnification? If so, this will vary the ISO greatly as you have experienced. Link to post Share on other sites More sharing options...
rnl Posted April 13, 2018 Share #8 Posted April 13, 2018 steady iso depends on steady battery voltage. turn off the LV and see what happens Link to post Share on other sites More sharing options...
kimaldis Posted April 18, 2018 Author Share #9 Posted April 18, 2018 When using classic metering, the exposure takes a second or so to settle when freshly turned on. And it allows you to take a shot? That wouldn't be so good. Link to post Share on other sites More sharing options...
kimaldis Posted April 18, 2018 Author Share #10 Posted April 18, 2018 steady iso depends on steady battery voltage. turn off the LV and see what happens You're assuming I have the live viewer on. I don't. :-) Link to post Share on other sites More sharing options...
kimaldis Posted April 18, 2018 Author Share #11 Posted April 18, 2018 Are you shooting RF or live view or a mix of both. If using LV, do you punch in with the magnifier to achieve critical focus and take the shot during magnification? If so, this will vary the ISO greatly as you have experienced. No. Link to post Share on other sites More sharing options...
pedaes Posted April 18, 2018 Share #12 Posted April 18, 2018 Key question - is the exposure 'incorrect' with different histograms? Link to post Share on other sites More sharing options...
brill64 Posted April 23, 2018 Share #13 Posted April 23, 2018 I use auto iso with 'auto power off' switched off & find it very accurate Link to post Share on other sites More sharing options...
paulsydaus Posted April 24, 2018 Share #14 Posted April 24, 2018 Can you post some examples? Link to post Share on other sites More sharing options...
keepsabeat Posted April 25, 2018 Share #15 Posted April 25, 2018 I have had this happen a number of times on my m10 Link to post Share on other sites More sharing options...
sblutter Posted May 1, 2018 Share #16 Posted May 1, 2018 Maybe you were using spot metering and the spot it was trained on in the 2nd exposure was different (lighter / darker) than the previous I also advise against using auto ISO. With experience you should be able to glance at a scene and know what ISO is appropriate. Obviously this can change quickly: like moving from indoors to outside. Very fast to change on 240 The only auto I use is shutter speed but am probably 75% full manual. All settings matter for intentional work. For fun stuff, who cares? Link to post Share on other sites More sharing options...
klgdigital Posted May 2, 2018 Share #17 Posted May 2, 2018 I have a new M10 (month old) and when I shoot at a shutter speed of 1/4000 and motor a few frames, I get wildly different exposures as if the shutter is getting in the way of my image. I have it on manual shutter, manual aperture(of course), and manual ISO. There should be no change in exposure, but in some frames, half the image is blacked out. Frustrating on a new expensive camera. Link to post Share on other sites More sharing options...
fatihayoglu Posted May 2, 2018 Share #18 Posted May 2, 2018 I have a new M10 (month old) and when I shoot at a shutter speed of 1/4000 and motor a few frames, I get wildly different exposures as if the shutter is getting in the way of my image. I have it on manual shutter, manual aperture(of course), and manual ISO. There should be no change in exposure, but in some frames, half the image is blacked out. Frustrating on a new expensive camera. I guess there was Firmware fix for that. You better check the firmware of your camera and download the new one. Link to post Share on other sites More sharing options...
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