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I like limiting the variables the camera will work with. I'm also not clear on when the auto-ISO kicks in, and not being clear, I usually avoid it.
What I mean is, say I've got a situation following a subject into an area of less light, shooting shutter-priority. Does the camera adjust aperture, ISO or slide them both, or does it only adjust ISO when it's run out of aperture adjustment? I'm not sure, so I avoid the question by not using auto-ISO.
Sure, I could test and use the EXIF data to find out what the camera did, but I really don't care enough.
Also, even if I did use auto-ISO, I would not want it to auto-select anything over 800, as 1600 is barely usable on my camera, so if I'm already shooting at 400 for good shutter speed, what good is one more stop?
When using shutter or aperture priority is it better to use auto ISO or select ISO?
Usually, we have some set variables that we either 1) need to control,or 2)would like to control. Example : Let's say the 400 meters at most high school stadium/football fields/running tracks...the 400meter race starts in the shade of the stadium's south end. I want to shoot at f/4 at 1/1250 second..So, in Manual Mode, we set AUTO ISO to ON, and it gives us ISO 1,000, and f/4 and 1/1250 second. In 10 seconds, the pack is almost 90 meters down the track, in FULL sunlight...we now have f/4 and 1/1250 second, but ISO drops about 5 EV, to ISO 64...then when the pack enters the stretch at the north end of the stadium, they return to shade..and an exposure that is 5 EV dimmer than the lighted part of the track..but because we are in AUTO ISO, instead of clicking 15, 1/3 stop clicks, the camera INSTANTLY elevates the ISO from 64 to 1,000, in an eye-blink. So we can shoot the last 100 meters at f/4 at 1/1250 at whatever ISO is needed.
Right now a Canon SL1 but I'm getting ready to buy a Canon 80DWhen using shutter or aperture priority is it better to use auto ISO or select ISO?
What kind of camera do you have?
I like limiting the variables the camera will work with. I'm also not clear on when the auto-ISO kicks in, and not being clear, I usually avoid it.
What I mean is, say I've got a situation following a subject into an area of less light, shooting shutter-priority. Does the camera adjust aperture, ISO or slide them both, or does it only adjust ISO when it's run out of aperture adjustment? I'm not sure, so I avoid the question by not using auto-ISO.
Sure, I could test and use the EXIF data to find out what the camera did, but I really don't care enough.
Also, even if I did use auto-ISO, I would not want it to auto-select anything over 800, as 1600 is barely usable on my camera, so if I'm already shooting at 400 for good shutter speed, what good is one more stop?
It sounds like you might be better off using auto ISO and a manually selected combination of f-stop and shutter speed, and of course in most modern cameras, you set the top ISO level that the system can choose, such as in your case, 800
I get the impression that you have not formulated an actual working plan for you and your camera using auto ISO, and Manual exposure setting. Perhaps you can try using manual exposure mode along with auto ISO setting, and programming in the parameters that are usable for you. For example, at the top I Usually set3200 to 4,000 what is my maximum, top allowable ISO value on the D610 and the D800. At ISO levels higher than 3200-4,000 I'm typically not that thrilled with the output from either of those cameras, except in the most rare of circumstances.
Let's be clear here: automatic setting of the ISO level is not the same thing in older or lower level cameras or in non-ISO invariant cameras, as it is in newer and better and high-performing sensor cameras. For example in my Nikon D2x,t'which I bought in May 2005, the sensor performance is so poor above ISO 160 that auto ISO was ridiculously inappropriate, and I never once have used it , but in the 2007 D3X and the newer D610 and D 800 and other newer models, ISOperformance has improved to a level that was undreamt of only a decade earlier.