logsplus wrote:
What is the best upgrade from a Canon T3i
It entirely depends upon your use of the camera....
If you travel a lot, you might want something smaller, in which case the mirrorless EOS M5 might be ideal. You'd probably need some new EF-M lenses to complement the camera, but there are adapters that allow use of EF and EF-M lenses on the M-series cameras.
If you shoot sports, a 7D Mark II would be your best bet and will work with any lenses** you already have... unless your budget is unlimited, then the 1DX II along with a some big, fast super telephoto lenses.
If you shoot landscapes and architecture, a 5Ds or 5Ds-R might be the best choice, but would require high end full frame-capable lenses to complement it.
General purpose with emphasis on wide angle: 6D (entry-level) or 5D Mark IV (more advanced). General purpose with emphasis on telephoto: 80D, which will work with any lenses** you already have.
General purpose with emphasis on more affordability, a T6i or T6s or the new 77D may be a good choice that leaves some $ in your budget for other things. All three of these will work with any lenses** you already have.
Most affordable of all, a T6 or the smaller SL1 are pretty basic, not much different from your T3i, might be more of a downgrade than an upgrade. But either of them will work with any lenses** you already have.
**Important note regarding lenses: All Canon EF and EF-S lenses will work on these "APS-C crop sensor" cameras without problem. Depending upon what you have and what you shoot, lens upgrades may be in order for better image quality, faster autofocus, adding image stabilization or other purposes. Sometimes lens upgrades give more bang for your buck than upgrading the camera. If you have any in your kit, any older third party lenses may not work properly with a new camera. Over the years there have been some compatibility issues with third party lenses. Full frame Canon cameras (6D, 5D-series, 1D-series) require full frame-capable lenses: Canon EF or third party equivalent. Full frame cameras cannot use EF-S Canon or "crop only" third party lenses.
Compared to T3i...
APS-C models:
- T6i and T6s have a higher performance 19-point autofocus system and 33% more image resolution (24MP vs 18MP).
- 77D and 80D have much higher performance 45-point autofocus system and 24MP sensor.
- 7D Mark II has ultra high performance 65-point AF system and can shoot up to 10 frames per second with 20MP sensor.
- T6 and SL1 are the least expensive and use 9-point AF system and 18MP sensor that are both very similar to T3i.
Full frame models:
6D has 11-point AF system that's similar to T3i's, except it can focus in lower light conditions (center point only). This 20MP camera is considered by many to be one of the best low light shooters.
5DIV and 1DXII respectively have very high and ultra high performance 61-point AF systems. They are 30MP and 20MP respectively. 1DXII can shoot as fast as 14 frames per second. Both are excellent for low light.
5Ds and 5Ds-R are have slightly less high performance 61-point AF. Their emphasis is on sheer resolution: 50MP. This makes them a bit less capable for low light shooting or video.