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Oh yes sorry a 400D. I have a 40D and whilst its a great camera its now quite dated in its high ISO performance so yes ISO800-1600 would max it out. Nex 6 and XE1 perform much better and will handle ISO3200 and even ISO6400 as they are latest gen sensors.
You'd be better off then getting a Polarie and do 120 exposures at ISO800 and that way lens choice is far less critical. You'd be better off with a cheaper lens and the Polarie. You'd end up with better images.
Nightscapes in my opinion are not that sensitive to the lens apart from wide and fast. Look at H's recent 50mm shot on a Polarie. Not the best lens but what a great result. Almost any lens is good stopped down. You really pay the extra for the lenses that perform well wide open. Cheap lenses tend not to. So go long exposure and stop it down and use your 400D and ISO800-1600 with long exposure noise reduction but no noise reduction (too plastic looking images).
Why chose a picture style? Less post processing. You end chosing one or the other in post processing. You are not locked in when shooting RAW but it saves time later. I like to have the ooc output just about perfect so there is less need for post processing. But that's just how I like to do things. No rule about it.
I believe Canon are working on a 14-24mm F2.8. No doubt it will be a cracker as it has to at least meet the Nikon 14-24 which has now been around for several years. Nikon and Canon tend to leapfrog each other.
Greg.
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