Originally posted by rawr Many wedding photographers would rather kill themselves than shoot any higher than even ISO 800.
I think that was more true a few years ago, ie the original 5D - I had friends that wouldn't shoot higher than ISO400, and wouldn't accept second shooter files shot higher than that either (!). Keep in mind that some wedding photographers are not gear hounds, pixel peepers, or overly artistic - but focus instead on business. This means less frequent hardware upgrades, and a general aversion to applying either NR or sharpening to their images. I don't want to say 'technophobe', but a good whack still think they have to edit every image in PS to call it 'done' when really they should be shooting more consistent M settings and just batch processing in LR... but they don't own LR.
Personally I do shoot the Sigma 70-200 on a K-5 in the aforementioned 'churches almost as dark as death metal shows' and it's often 800-3200 ISO as a normal thing. Even if I can get good SR, there will be subject motion, so higher shutter speeds are also called for, I guess I settle around 1/250th but may go up or down a notch. Depending on the distances and angles I do (rarely) have to go to 6400 if I'm at 200mm and need more DoF than f/2.8 gives.
It's also a game... we might call them a 'semi usable shot', but the couples are always amazed that any shot exists at all, especially if they've seen the Uncle Bob shots that suck.