Hello! I am a photography hobbyist. I love taking photos of my kids and family mostly, and sometimes nature. I have a Canon Rebel T2i that I have had for over 10 years now along with a 55-250mm, 50mm, and an 18-55mm. I am looking to upgrade and still use my current lenses. My main reason for the upgrade would be to have wifi upload capabilities, but also more sharpness, but stay in a similar price range from what my current camera was. Any suggestions are welcomed! Thanks in advance!
First, those are absolutely beautiful photos of the kids. A 90D will only help you do even more.
"I had (obviously) wrongly assumed that improved resolution would improve sharpness, but what you say makes a lot of sense! "
I don't know where some of the other guys are coming form but the 90D is a dramatic upgrade over a T2i. There is no place where it isn't. It has the highest resolution of any Canon APS-C camera. Super image quality. Faster 10fps burst shooting. Extremely fast AF. Dual Pixel CMOS AF in Live View. 4K video.
Yes, lenses do make the biggest impact on the photo but like everything they are not in a vacuum. A better camera will always take a better photo given the same lens on either. The 90D is also going to have built in wi-fi and bluethooth if that is important.
Listen, kido, to an old pro, you have the talent. Not everybody does! Get yourself the 90D. Start shooting Raw format and get a good post editor. Canon has one for free that comes with the 90D called DPP4 (Digital Photo Pro). I prefer Photoshop but DPP4 is a capable editor.
If you really want to step up your game also check out the Canon EF-S 17-55mm f/2.8 IS USM Lens. This lens and the 90D is about as good as it gets. Even the vaulted 1 series ($6000 bucks) and L glass will have a hard time besting that combo.
One last thing I tell everybody in your shoes, how long are those kids, kids?