32mm f/1.4 --- Blue Mountains - (PICS)
Re: unexpected ISO changes
John TF wrote:
Raanani wrote:
Marco,
Re the ISO problem - same here. I bought an M6 (largely due to your response to my question on this forum) some 2 moths ago. It happened to me twice that I switched from ISO100 to auto ISO, which ruined my photos. It is jus too easy due to M6's responsive touch screen.
+1
Alrighty... I just looked into this with my own M6 and i believe I can see what's happening. The ISO feature can be activated by touching the ISO button or the ISO icon on the touchscreen.
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When I grip the camera from the rear and am lowering as I turn it off, I notice that i can hit the ISO button with the lower portion of my thumb... or I can quite easily hit the ISO icon on the LCD. The ISO window then opens and if my thumb (the lower thumb area that connects to your palm) is still in contact with the LCD screen, it tends to be moving slightly. This movement slides the ISO to either 100 or all the way to 25000. This explains why I've had this happen yesterday and once before in the city a year ago.
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It's not easy to do unless you rest your hand on the lower right corner of the screen. But then, if the camera is still turned on, you can inadvertently alter the ISO and it will most easily slide to either 100 or (if pressed the other way) to 25000.
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The most LIKELY way that it occurred with me is by lowering the camera and pressing accidentally against the scroll wheel before it was turned OFF. The continued pressure on the wheel then alters the ISO setting. The direction goes up or down depending on the direction of movement from your hand.
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To be fair, it's essential to have access to an ISO switch on the back of the camera. But if you grip your M6 (and presumably some other models) by allowing your hand to come in contact with the ISO switch, the odds are fantastically high that you can change your ISO setting accidentally. I wouldn't call this a design flaw... because so many other cameras have the same ISO switch on the same portion of the camera. But it's more likely to be hit if you use your M6 without a camera strap or use a hip mounting plate (like the ones from PeakDesign). If you don't use the strap you'll tend to cling more securely to the camera. If you use a hip mounting plate like I do, you can press this button as you go to holster the camera. If the camera is still switched ON, then you might end up altering your ISO by accident.
Canon EOS M6
Canon EOS Ra
Canon EOS R6
Canon EF-M 32mm F1.4
Canon RF 85mm F1.2L USM
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