my 40D is dying...probably from overuse. Sometimes I'm having issues with metering and sometimes the system won't switch to "preview mode" properly (I don't know if it's a software glitch or a hardware issue).
There is no one thing that I can pinpoint that I miss. Shooting better in low light would definitely be great and having 61 focusing points is a definite asset, but the price tag on those 5D-3 is quite hefty. I can afford it, but the question is - do I really need it? Since I'm not shooting professionally, will it really be justified it for me?
Nonac - I've read your review after I have posted this topic, which made me add more weight towards the 5D-3 decision. You've actually wrote about some things that I find very important, so thank you for sharing.
Fugu82 - thanks for the info, it's always nice to hear from people that have actually experienced both cameras in person, as opposed to comparing specs on paper.
Mt Spokane - that's a good point. and on one hand you are right - what's the point of having a great lense where the camera can't pull 100% out of it? on the other hand - getting a less expensive body and another piece of glass (24-70L for instance) is also a good option......so many things to choose from.When you say "fine tuning", what do you mean? Are you referring to post editing or are you talking about having to adjust AF manually (i.e. switch to MF and fine tune it)?
7D won't do that much better in low light than 40D if you shoot RAW. I had a 20D and I was shocked that the noise performance at ISO 1600 was about the same as the 7D. The 7D is a great camera if you have to choose something now and want improved AF. I played around with Rebels and the lack of the control wheels in the back would annoy me until I got used to it.
Also agree with Mt Spokane. If you use f/2.8 lenses or faster, the body really should have microfocus-adjustments. That's one reason why I would not consider a Rebel or 60D. The amount of adjustment that the feature affords can result in a large difference in resolution.
FF is a lot more expensive. UWA lenses cost more on FF and you will need longer lenses on the other end. However, fast primes shine on FF and the shallow DOF can not be duplicated on APS-C.