Does having Auto Lighting Optimizer enabled change the shutter speed automatically in manual mode (with auto ISO)?
Edit: Wondering if it's normal for the shutter speed to change slightly with ALO enabled in manual mode with auto ISO. Anyone?
CaPpedDoG Member More info | Feb 11, 2014 02:17 | #1 Does having Auto Lighting Optimizer enabled change the shutter speed automatically in manual mode (with auto ISO)?
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apersson850 Obviously it's a good thing  More info | Feb 11, 2014 02:30 | #2 No, it works on the image like postprocessing does. Anders
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Feb 11, 2014 02:40 | #3 Thanks for the quick reponse. The reason I'm asking is because I recently enabled it and have now noticed my shutter speed automatically fluctuating in manual..... I will set it to say, 1/50 and it drops down to 1/40; alternating back and forth.
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BigAl007 Cream of the Crop  8,120 posts Gallery: 556 photos Best ofs: 1 Likes: 1682 Joined Dec 2010 Location: Repps cum Bastwick, Gt Yarmouth, Norfolk, UK. More info | Feb 11, 2014 03:52 | #4 That sounds as if you are maxing out on the ISO and have safety shift enabled. Remember that if you select AutoISO then you are nolonger shooting in manual, but a semi auto mode with the shutter and aperture as the fixed variables. Just like Av and Tv (without AutoISO) have the ISO fixed along with either the aperture or shutter speed. The only disadvantage to this mode is there is no Exposure Compensation available unless you are shooting the V2 firmwear in a 1Dx. None of this has anything to do with using ALO.
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Feb 11, 2014 10:18 | #5 BigAl007 wrote in post #16680461  That sounds as if you are maxing out on the ISO and have safety shift enabled. Remember that if you select AutoISO then you are nolonger shooting in manual, but a semi auto mode with the shutter and aperture as the fixed variables. Just like Av and Tv (without AutoISO) have the ISO fixed along with either the aperture or shutter speed. The only disadvantage to this mode is there is no Exposure Compensation available unless you are shooting the V2 firmwear in a 1Dx. None of this has anything to do with using ALO. Alan Appreciate the reply. Doing some more testing this morning, I am not maxing out the ISO. This change in the shutter speed only happens with ALO enabled; no change whatsoever with it off. This is with a 1DX.
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apersson850 Obviously it's a good thing More info | Never seen this. I'll have to see if I can provoke it to happen. Anders
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Feb 11, 2014 16:59 | #7 apersson850 wrote in post #16681635 Never seen this. I'll have to see if I can provoke it to happen. Yea it seems strange. Then again, I've never used ALO in the past. Like I said before: happens in manual mode, with auto ISO. It doesn't do it all the time. Seems to happen more when I point it at shadows/dark objects.
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Feb 13, 2014 13:16 | #8 Anyone else notice this?
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