I am in the market for a new body and having a tough choice between waiting for the 70d announce, buying a 7d which has a few pluses I will cover later, or a T4i which I want to see direct performance caparisons to the 7d before deciding.
I do not have a lot of money to throw around so will be living with the new body for at least 2 years.
The t4i has a few things that make it exciting for me:
1. New focus system, the rebels have had until now a 9 point focus system,
with 1 cross type centre point.
This is being changed to 9 cross points like the 50 and 60 d had before it, with the addition of a new double cross centre point.
2.In addition the 18 megapixel sensor is a completely new design..this is not the same sensor as the previous 18 megapixels had.It has a newly designed focus system built in for video focusing as well that uses a new type of independent focus system making it a hybrid sensor.Previous dslr's could not auto focus during video the T4i is the first of its kind.
3. Also the processor is being changed from digic 4 to digic 5 making it faster and able to reduce iso noise by 75% of the what the digic 4 was putting out.
4. to go along with the bodies new high iso performance the camera now has higher iso levels enabled
Reduced noise will be more effective in jpeg than in raw.
Summary, better at focusing in general, and better at shooting in low light for me these upgrades seem huge,
The 7d is only about $500 more than the T4i this makes which to buy a hard decision.
main 7d advantages over the T4i from my perspective.
1. Larger viewfinder you can see more of what you are trying to shoot through the viewfinder making the act of taking photo's a bit more immersive.
2. 19 cross-type auto focus points
3.dual digic 4 processors ? is this an advantage over one digic5 ? I don't know.
4. +/-20 step Micro-adjust... this is a big advantage the ability to adjust the focus to compensate for a specific lenses front or back-focusing... suspect your lens is a bit off.. micro-adjust to for it specifically.
Conclusion it is hard for me to make a sound decision on which to buy...
1.I have no way of knowing if the T4i's new double cross point is more accurate than the 7d's old system.
2.Micro-adjust this is the big advantage of the 7d over the T4i for me
3. which has better iso performance.. the 7d's dual digic 4 or the T4i's single digic 5 ... I honestly do not know.
4. How does the new hybrid 18mp sensor stack up to the old one ?
I think that in all honesty I am going to have to wait for a few weeks to get these questions properly answered .



