Sidwalkastronomy wrote:
I would look into differences in the models with the "i" or not. I think with the I have a little extra features for only a little more money. The did come out with a T8i too. I have the t7i I bought used as a back up to the 77D another camera to put on your search. ITS a little upgrade from the T series
Just to clarify, recent Canon "Rebel" series models:
Rebel T6i (750D) and
T6s (760D) are nearly identical models. The T6s is a slight upgrade with an added LCD display and a few more direct controls.
T7i (800D) and
77D were respectively the successors to the two models above. (Yes, 77D is a "Rebel" even though Canon changed their naming convention.)
The
T6 (1300D) and
T7 (1500D, 2000D) are far more entry-level models. in fact, there's not a lot of difference between them. For example, both use a pertty ancient Digic 4 processor. The oldest of the other models on this list (T6i) use a Digic 6, while the newest (SL3/250D) uses a Digic 8. Neither T6 nor T7 even have a self-cleaning sensor, which is a standard feature on every other model listed here... even the SL1/100D!
The
SL1 (100D) was the smallest and lightest weight DSLR anyone ever made, but has specs quite similar to T6... very entry-level.
SL2 (200D) and
SL3 (250D) are also very compact and light, though they have gained a few grams compared to the SL1. Compared to that first model, both SL2 and SL3 got significant upgrades and, other than their primary autofocus system, have specs closer to the T7i. There isn't a lot of difference between SL2 and SL3. Mostly, the latter got some video-related upgrades.
The T6, T7, SL1 use slower contrast detection autofocus in Live View. The T6i and T6s use what Canon calls a hybrid AF system in Live View, which is better than contrast detection. But it's not as fast and good as the Dual Pixel CMOS AF that all the other models on this list use.
T6, T7, SL1, SL2 and SL3 all use a simple 9-point AF system, much like what Canon introduced in 2004 in the EOS 20D. This system has a single, higher performance dual axis AF point at the center. The other 9 points are lower performance single axis.
T6i and T6s both use a 19-point AF system, all of which are the higher performance dual axis type. This is a somewhat simplified form of the AF system Canon introduced in the original EOS 7D in 2009.
The T7i and 77D have a 45-point AF system, all of which are higher performance dual axis, largely inherited from the 80D where Canon introduced it in 2016. These two cameras are the only "f/8" capable AF models on this list. This basically means they can use more lens/teleconverter combos, thanks to greater sensitivity in the AF system. Depending upon the particular lens/teleconverter combo, this is limited to no more than 27 AF points and in many cases only the one point at the center. The other cameras are all "f/5.6 limited", meaning their AF systems cannot autofocus when a teleconverter is added to a lens to make for less than f/5.6 max aperture. This significantly limits the possible lens/teleconverter combos that can be used on these cameras (manual focus remains available and might be assisted using Live View).
All the models listed have approx. 24MP sensors, except for the T6 and SL1, both of which use 18MP (similar to what was first intro'd in original 7D, 2009).