Pagman wrote in post #17634645
I have read in many places that 320,640 and 1250 are the cleaner ISO settings than just using the native speeds of 400,800 1600 etc.
So what. Read on.
Pagman wrote in post #17634664
I have just been doing the reading up on it and probably like yourself there are those who think 320, 640 etc are a real bonus and others believe not, I too would interesting to find out the truth behind this.
The truth is that the 7D can be used quite effectively at ISO 6400, if the shooter/processor knows what (s)he is doing. Any miniscule differences between 320 and 400 are totally irrelevant to producing a quality shot.
gonzogolf wrote in post #17635062
With a backlit bird it may be that you have to blow out the highlights in order to retain proper exposure on the bird. ETTR is not meant for this situation.
I disagree. ETTR works just fine here. But, the shooter has to expose for the bird, and at that point the sky is way past blown.
gonzogolf wrote in post #17635077
Because you don't seem to understand what we are saying. Little dark bird in big bright sky. It fools your meter and the contrast may be more than the EC can accomplish. Especially if you are worrying about applying ETTR instead of exposing for the subject.
Bingo. Admittedly, I only read about half of this thread. I can't believe nobody has suggested (please forgive me if you have) the obvious and easy solution, which follows:
You want to shoot a BIF, or bird on wire/pole whatever. You are most certainly going to be on the 'sunny side' of the bird. Aim camera at a sunny spot on the ground. The same sun is lighting the ground as the bird. Fix exposure using Manual mode or exposure lock (*-button). Dial in some +EC (ETTFR, if you insist). Aim camera at bird. Focus. Trip shutter. You now have a properly exposed, or close to it, shot of your bird. I recommend Manual over *. That way you can chimp/adjust without having to meter off the ground again.
gonzogolf wrote in post #17637199
Anything that can be done in auto, can be done in manual im terms of metering and exposure.
True. But the reverse is not true. There are things you can do in Manual that just don't work in Av/Tv/P. The biggest is making the camera do what you want it to do, instead of what the engineers thought you may have wanted it to do.