Finally! A new APS-C camera and sensor from Canon. The old 18mp sensor that first appeared in the 7D has had a long, long, ride, but we've finally found out why Canon took so long coming out with something new. It's a little bit of the expected ("70D", didn't see that name coming) and a bit of the unexpected.
Canon 70D vs Nikon D7100
This will be the one that everybody will be asking; I know I'm asking this already. Since the Nikon D7100 has been out for a few months now, it's a known quantity: excellent for stills, files aren't as abusable as with the D7000, reliable autofocus but not as quick as the D300s. The 70D is a bit more of an unknown.... at least the body and handling will be familiar.
Advantage Canon 70D
- Touchscreen LCD that now swivels
- Build in Wifi (Optional on the Nikon)
- Traditional AF system from the 7D
- Theoretically better live view focusing, but pretty much anything is better than Nikon's live view focusing
- Probably a better movie mode, maybe even dramatically better if the live view autofocusing lives up to its promise. Combine this with the flip-out LCD screen and you have a serious DSLR video device.
- 7 fps burst rate compared to 6fps for the D7100 (Actually, not a real world difference)
- Larger buffer (The D7100 can only hold 7-9 shots NEF depending on compression/bits)
Advantage Nikon D7100
- Tougher body with partial metal frame
- Dual card slots
- Has hard more time on the market and has already taken some bite out of 60D/78D users waiting for upgrades
- Greater number of AF points means that you can be more precise with your AF point placement
- 100% viewfinder coverage vs 98%. Hardly worth mentioning, actually
Of course, there's one area where we can't say for certain who is better at the moment, and that is with image quality. For the most part, there likely won't be a difference, but the old 18mp sensor, though competent, was starting to show its age. But one thing is for certain, Canon versus Nikon, the age old (pointless?) argument just got interesting again.