auto ISO works very well in manual mode. It works like the other automatic modes and corrects the exposure as far as your settings allows it. If you wanted to deliberately over- or under-expose you have to do it by the manual override +/-. This ist a little unusual, but you get used to it very fast

Geetings
JK

Sorry – I’m a Nikon guy and have not used a Canon DSLR so can’t comment on their auto-ISO handling. I use auto ISO only when I’m shooting sport or in low light situations and I find that it works beautifully for me. I can keep the ISO as low as possible but have the camera help me out in really tricky situations. Another plus is that the sensitivity changes only as much as is needed to achieve your shutter speed goal – you don’t see full stop or even half stop jumps in sensitivity if only a quarter stop change is needed.

I actually used auto-ISO for something new yesterday. I was doing some concert photography in a very dark hall and it worked pretty well. In this case, I was shooting with a 50mm f/1.4 wide open and with auto-ISO set to allow sensitivities up to 3200ISO, I was still having problems keeping a shutter speed above 1/100th.

The beauty of the Nikon system for me is that it allows me to use Aperture Priority but mix in an element of shutter priority in that I can fix a minimum shutter speed. This lets me concentrate on depth of field and be comfortable knowing that I shouldn’t have too may slow shutter speed problems.

In an earlier post, you talked about using auto-ISO in manual mode. Does this work? It would surprise me if this was supported since the camera would then be overriding your manual exposure choice – if you wanted to deliberately over- or under-expose, how would the camera know your intention and how would it set the ISO? That said, an automatic mode like this would make sense given that we already have auto modes which allow you to set 2 of the 3 exposure variables while the camera picks the 3rd.

JK

I suspect most of you are Canon shooters (or, at least, not Nikon shooters) since no-one mentioned the awesome auto-ISO feature that Nikon has on many (if not all) their DSLRs.

If you are in a situation where you want to use aperture priority to control the depth-of-field while also maintaining a fast shutter speed, you can set the auto-ISO feature to force a particular minimum shutter speed. If the exposure required (given you aperture choice) would cause the required shutter speed to fall below this, the ISO is increased just enough to get you back to where you need to be.

The only time I use this is when shooting sport. I will set the base ISO to 200, set the auto-ISO threshold to 1/500 or 1/1000, open the lens wide and shoot. If there’s enough light, the camera will hold 200 ISO and use higher shutter speeds but, if the light level falls, it will ensure that my shutter speed remains no slower than the threshold value I set.

btw: Excuse my poor english, my listening is much better than my writing, and that ist what counts when it comes to podcast

JK

The “new” Auto ISO is a very good thing to me, because it spreads the other settings e.g the aperture priority. Let’s say you are taking pictures of an wedding indoor and you dont use a flash. You set your aperture to 2.8 on your 85mm lens and you don’t want the shutter speed get lower than 1/100sec to avoid camera shake. The best thing ist to turn on the ISO automatic and let the camera do the rest. So you can concentrate on the people you photograph.

Greetings from Germany
JK

Greetings from Ludwigsburg (Germany)
JK