Photon wrote:
Yeah. Also, as Pixel Perfect pointed out about a year ago, Tv can also be used with Auto ISO. I like this in situations where I'm comfortable with wide open aperture. I can quickly adjust SS to suit motion (or lack) and equally quickly dial in EC for heavily backlit subjects. When I don't see a need for major EC, I like manual exposure and Auto ISO. This goes for the 1DX and 5DIII, though the 1DX meter is a little better.
If you have a 1 series you can limit the max aperture. As an example I was using the 300 f/2.8 in Tv mode, but it always chooses f/2.8 which can be too little DoF and is tough for the AF system when the action is fast, so you can say limit max aperture to say f/5.6. Sure this will mean Auto ISO has to use a higher ISO to maintain your shutter speed, but it's better than oof shots.
Pixel Perfect wrote:
If you have a 1 series you can limit the max aperture. As an example I was using the 300 f/2.8 in Tv mode, but it always chooses f/2.8 which can be too little DoF and is tough for the AF system when the action is fast, so you can say limit max aperture to say f/5.6. Sure this will mean Auto ISO has to use a higher ISO to maintain your shutter speed, but it's better than oof shots.
Good point, and if you set all this up as one of the "C" modes you can quickly get in and out of the aperture limit.
I do auto ISO plus I set a minimum shutter speed for whatever I'm shooting. Field sports - minimum 1/500th. Weddings - minimum 1/250th. Portraits - minimum 1/125th. Then the camera adjusts the ISO down to get near that minimum and I tell it what aperture to use.
Only problem I have with Auto ISO is that you don't have EV +- control for situations like stage/concert lighting when it's in Auto ISO mode. Might be able to us Safety Shift to accomplish the same thing, but haven' tried that yet.
photogoofer wrote:
Only problem I have with Auto ISO is that you don't have EV +- control for situations like stage/concert lighting when it's in Auto ISO mode. Might be able to us Safety Shift to accomplish the same thing, but haven' tried that yet.
Exposure compensation? Yes you can, I use it all the time when I don't like how the camera is metering something and I'm using Auto ISO.
I generally have one of my customer modes set up for with the flash deactivated, a wide aperture, ~1/80 shutter and auto ISO. That way with the flick of my index finger I can catch ambient-lit activity anywhere in a room, regardless of the lighting situation. In a situation like your dance hall with mixed ambient, this may prove to be invaluable. The 1DX and 5D3 both let you set max ISO when in Auto mode, so you can limit the amount of noise produced by super-high settings. It's not an ideal way to shoot, but as mentioned the 1DX metering is the best I've ever used and 9 times out of 10, the exposure is either perfect or good enough to fix in post. I've managed to get some great crowd reaction shots and such this way.
I will say I miss the ability to do EC with auto ISO, but the method above might be the exact approach needed. The other method I have heard proposed is to go to Tv and then set the min and max f-stop to the same number. You effectively have manual mode at that point with auto ISO and EC works. I like the idea of minimum shutter though, because I can then dial in f-stop changes as required -- going to try that next time I shoot.
One other thing to note about auto ISO. If you're using a flash, the auto mode defaults to 400 ISO for some asinine reason. You'll have to go fully manual to get flash working with higher ISOs.
photogoofer wrote:
Only problem I have with Auto ISO is that you don't have EV +- control for situations like stage/concert lighting when it's in Auto ISO mode. Might be able to us Safety Shift to accomplish the same thing, but haven' tried that yet.
Only in M mode is this true. In Av or Tv mode you can have EC with Auto ISO, I do it all the time.
Safety shift is not EC, it just means the camera will override your desired shutter speed or aperture if it can't get the correct exposure or if you set it for ISO, it means when you are not using Auto ISO, it will override your ISO setting to obtain the correct (standard) exposure)
