soccerrick10 Posted October 16, 2023 Share #1 Posted October 16, 2023 Advertisement (gone after registration) I’ve been comparing my Q2M to my new M11M and have an exposure question. I have the M11M set to aperture priority, auto shutter speed and auto iso. When I move the camera around the scene, the aperture is fixed, the shutter speed floats and the ISO floats. When I set up the Q2M with what appears to be the same settings, the ISO floats but the shutter speed stays fixed at 1/100. I can’t for the life of me figure out what I’m missing to get auto shutter speed. Any ideas or help would be greatly appreciated. Link to post Share on other sites More sharing options...
Advertisement Posted October 16, 2023 Posted October 16, 2023 Hi soccerrick10, Take a look here Q2M vs. M11M operation question . I'm sure you'll find what you were looking for!
Le Chef Posted October 17, 2023 Share #2 Posted October 17, 2023 Even if you were shooting at exactly the same time and shooting the same subject and were using the same aperture you might notice some differences. Do you have OIS switched on for the Q? What minimum shutter speed do you set for that? What are the minimum and maximum ISO ratings you have set for both cameras? And obviously are you shooting with a 28mm Summilux lens on the M? Link to post Share on other sites More sharing options...
thegobi Posted October 17, 2023 Share #3 Posted October 17, 2023 Sounds like what LeChef says: have you checked your settings in the 'Auto IOS Settings' menu? That would explain why it wasn't dropping below 1/100 -- if it is just stuck at 1/100 - even with enough light - I am a bit stumped... 1 Link to post Share on other sites More sharing options...
Le Chef Posted October 17, 2023 Share #4 Posted October 17, 2023 You also need to switch off iDR, if you have it on. Link to post Share on other sites More sharing options...
soccerrick10 Posted October 17, 2023 Author Share #5 Posted October 17, 2023 20 minutes ago, Le Chef said: Even if you were shooting at exactly the same time and shooting the same subject and were using the same aperture you might notice some differences. Do you have OIS switched on for the Q? What minimum shutter speed do you set for that? What are the minimum and maximum ISO ratings you have set for both cameras? And obviously are you shooting with a 28mm Summilux lens on the M? Le Chef - I’m not really worried about the differences in meter readings. What I’m trying to understand and resolve is why the Q2M never adjusts the shutter speed when the M11M does - which is what I’d expect. The OIS is set to auto ISO set to auto Auto ISO settings - Max ISO = 25000, Min shutter Speed = 1/(4f) I THINK I UNDERSTAND IT NOW: With the Min Shutter Speed set to 1/(4f) and the 28mm lens (4 x 28mm = approximately 1/100). Then the real key is the amount of available light. It does adjust but, there has to be enough light to drive the shutter speed to be faster than the minimum - DUH! Thanks guys for the help. Funny how something simple eludes me and then drives me crazy. 2 Link to post Share on other sites More sharing options...
soccerrick10 Posted October 17, 2023 Author Share #6 Posted October 17, 2023 (edited) 10 minutes ago, Le Chef said: You also need to switch off iDR, if you have it on. I have it set to Auto. Should I turn it Off? I’m shooting DNG only. Edited October 17, 2023 by soccerrick10 Link to post Share on other sites More sharing options...
Le Chef Posted October 17, 2023 Share #7 Posted October 17, 2023 Advertisement (gone after registration) 7 minutes ago, soccerrick10 said: I have it set to Auto. Should I turn it Off? I’m shooting DNG only Personally I would turn it off as I don’t believe it directly affects RAW output. Even if it does, I would prefer to make those kind of changes in LightRoom where I control the output, not the camera. Link to post Share on other sites More sharing options...
soccerrick10 Posted October 17, 2023 Author Share #8 Posted October 17, 2023 Cool thank you again for your help. I really appreciate it! Link to post Share on other sites More sharing options...
thegobi Posted October 17, 2023 Share #9 Posted October 17, 2023 1 hour ago, soccerrick10 said: Le Chef - I’m not really worried about the differences in meter readings. What I’m trying to understand and resolve is why the Q2M never adjusts the shutter speed when the M11M does - which is what I’d expect. The OIS is set to auto ISO set to auto Auto ISO settings - Max ISO = 25000, Min shutter Speed = 1/(4f) I THINK I UNDERSTAND IT NOW: With the Min Shutter Speed set to 1/(4f) and the 28mm lens (4 x 28mm = approximately 1/100). Then the real key is the amount of available light. It does adjust but, there has to be enough light to drive the shutter speed to be faster than the minimum - DUH! Thanks guys for the help. Funny how something simple eludes me and then drives me crazy. Not really a Duh moment 🙂 - the 1/(xf) setting seems a bit odd on a fixed focal length camera. Unless I am missing something, I am not even sure why it exists… (doesn’t seem to make any difference to the crop modes either) - just have a range of shutter speeds. …also, don’t forget there is an image stabiliser lurking in that lens - on auto, it kicks in below 1/60 sec ( I think). Link to post Share on other sites More sharing options...
cgiammona Posted October 19, 2023 Share #10 Posted October 19, 2023 On 10/16/2023 at 6:21 PM, Le Chef said: Personally I would turn it off as I don’t believe it directly affects RAW output. Even if it does, I would prefer to make those kind of changes in LightRoom where I control the output, not the camera. iDR only effects jpg output if I remember correctly. Link to post Share on other sites More sharing options...
hedleyw Posted October 19, 2023 Share #11 Posted October 19, 2023 6 hours ago, cgiammona said: iDR only effects jpg output if I remember correctly. Also the camera display, useful if you are using highlight weighted metering so that shadow details are more easily seen. 1 Link to post Share on other sites More sharing options...
Derbyshire Man Posted October 27, 2023 Share #12 Posted October 27, 2023 Isn't 1/4 x Focal length 28/4 or 7th of a second? Link to post Share on other sites More sharing options...
thegobi Posted October 27, 2023 Share #13 Posted October 27, 2023 the menu choice works like this: 1/ ( multiplier times focal length ) so: 1/ (2 x 28 ) = 1 / 56 Rounded off to: one sixtieth of a second 1/(4f) = 1/112 second 1 Link to post Share on other sites More sharing options...
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