How is Auto ISO these days?

JeffreyG wrote in post #15651474
I guess you do not have one of the cameras that works this way, but if you read post #7 in this thread you will understand why this is not correct.

When you enable auto ISO on a 7D, 1D4 or 5D3 then M mode is not M mode anymore. Functionally it is aperture and shutter speed priority mode. And it does need exposure compensation.

600D, 650D, and I assume 550D and 60D are members of this club too.

I have learned considerably more from this thread than I anticipated... Thanks for the information everyone! Feel free to keep your Canon ISO complaints, praises, or any other input coming .

JeffreyG wrote in post #15651474
I guess you do not have one of the cameras that works this way, but if you read post #7 in this thread you will understand why this is not correct.

When you enable auto ISO on a 7D, 1D4 or 5D3 then M mode is not M mode anymore. Functionally it is aperture and shutter speed priority mode. And it does need exposure compensation.

We are agreeing Jeffrey. Auto ISO in Av mode does not allow one to choose a shutter speed above 1/250 as the 'jump' point to the next iso. You can get round this by shooting in Tv but then you have no control over your aperture. You can shoot in manual where you can control both and let the camera just manipulate the ISO to match metering however as you point out, there is no exposure compensation so this is not a solution. For my needs at least the auto iso needs to have that 1/250 limitation removed to make it worthwhile, there was no legitimate reason to make this limitation other than some exec boasting that they can handhold long lenses every day of the week at any shutter speed and that a 1/250 will always stop action. Neither of those are true, especially at 22 megapixels.

I joined this forum this week as I just bought my first full frame camera, a Canon 6D. I just wanted to say this thread was super useful, so thanks. Some of my images in low light were really over exposing these first few days of shooting. I noticed in Av I'd have to use EC to stop down quite a bit to get what I wanted. Even if I choose a minimum shutter speed, auto ISO seemed to be picking excessively high ISOs to get "correct" exposures, so I have been a tad frustrated. This is still the learning stage so I am not too worked up about it. I have my SET button programmed to quickly adjust ISO manually but real exposure compensation would be nice for manual shooting with auto ISO. Didn't know I was missing it until now!

Anyway, thanks again. This thread gave me some good ideas on how to gain some better control.

TSchrief wrote in post #15647375
I am not sure, because I don't own a 5D3, but that makes no sense to me. I can use Auto-ISO on my 60D and select any shutter speed from 30 seconds to 1/8000. My guess is that there is a custom function that limits the shutter speed. If that is NOT the case, you are certainly doing something improperly.
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On the 5DMKIII within the ISO menu you can set a minimum shutter speed that the camera will choose (if it can) when using Auto ISO. The 60D doesn't have this feature.
Of course any shutter speed can be used with Auto ISO.

I use auto ISO often on my 60d. I am shooting a lot of kid's sports and sometimes the lighting changes dramatically but I need my aperture and shutter speed to stay constant. Auto ISO does a good job with that and I'm mostly pleased with it.

I love shooting Manual ISO for tennis and football during changing lighting conditions. It's really terrific to be able to add Exposure Compensation for back-lit shots during Manual Auto ISO as outlined in post #17.

Instant reaction to changing light, pre-set values for SS and Aperture, best ISO possible and the ability to have EC for back-lit situations and those times when the subject is wearing a cap, visor or helmet.

It's the best of all worlds for my 1D IV and 1D X. Just use the technique described in post 17.

jimchugoku wrote in post #15663508
I joined this forum this week as I just bought my first full frame camera, a Canon 6D. I just wanted to say this thread was super useful, so thanks. Some of my images in low light were really over exposing these first few days of shooting. I noticed in Av I'd have to use EC to stop down quite a bit to get what I wanted. Even if I choose a minimum shutter speed, auto ISO seemed to be picking excessively high ISOs to get "correct" exposures, so I have been a tad frustrated. This is still the learning stage so I am not too worked up about it. I have my SET button programmed to quickly adjust ISO manually but real exposure compensation would be nice for manual shooting with auto ISO. Didn't know I was missing it until now!

Anyway, thanks again. This thread gave me some good ideas on how to gain some better control.

I'm glad you found this thread helpful, thanks for your input, and welcome to the forum!

JeffreyG wrote in post #15651474
Functionally it is aperture and shutter speed priority mode. And it does need exposure compensation.

Amen. I find that +2/3 stop EC gives me, in general, the best results with my 7D. I love the ability to set Auto ISO in Manual mode, but I find that I get shots that are often 2/3 stop underexposed. The 7D does not need unnecessary underexposure. A true Auto ISO, with EC, would be a great feature for the 7DII.