Blurryeyed Loc: NC Mountains.

Didn't need to read that. Sorry, love my dogs, always as pets, not tools or a revenue source.

gsmith051 Loc: Fairfield Glade, TN

I kept all of them. Still find need for the 6D even though I have a Canon R.

sippyjug104 Loc: Missouri

I'd like to go 'mirrorless' in my bathroom. I keep seeing the same old ugly guy each time I look into it.

mdoing

I fully endorse your idea of going with a mirrorless camera, would suggest R6 that I have or if you can afford it, R5. The rumored R7 is interesting. I would keep the 90D, I would expect that you will almost never use it, but if you go on the trip of a lifetime with only one camera body, you are risking heartbreak. I had my 70D shutter fail while on a trip to Nepal and Bhutan. Another guy on the tour that had a back-up camera with him took pity on me and let me borrow it, he has my gratitude. About a year ago we went to South Georgia and Antarctica, on our first day on South Georgia, I got my supposedly water resistant camera so wet that it stopped working, I had a back-up that kept me from jumping overboard. The next morning the main camera dried out and came back to life. The moral of the story is if you are a traveler, two is better than one!

MtManMD Loc: Beaverton, Oregon

I focus both on wildlife and landscapes most of the time, so went with a two body system. Purchased the R5 along with the 24-240mm RF lens (love them both), but have it paired with a 90D. The 90D will always be with me and have a long telephoto lens attached for wildlife. The 32.5MP crop sensor can be cropped in addition to the telephoto reach. The R5 and wide range of zoom covers everything else, rarely with need to change the lens. Also have the EF/RF lens adapter. I'll take a look at the R7 if/when it comes out. Until then I've got the best combination for me.

47greyfox Loc: on the edge of the Colorado front range

However, I wonder how smart a move to the M series would be since Canon has discontinued them?

sshus924 Loc: South Florida, USA

I had a Canon 5D MK IV and a Canon 7D MK II. One a full frame and one an APC. I decided to trade in the 5D MK IV and keep the 7D MK II and got the Canon R6. I am not sorry! The R6 is just as robust in built quality and has a much better auto focusing system. The 20 meg sensor does not seem to degrade the images I have taken and processed. I use the 7D MK II for wildlife, birds and such. I am considering getting the 600mm f/11 RF lens to use with the R6 and compare that with the 7D. The price of the 600mm and 800mm f/11 lenses are a bargain, based on many reviews. Good luck. Keep your 90D and go for the Canon R, RP or if you can, the R6!! Good luck.

mdoing

I guess this is off the topic, but good info for someone looking to choose a camera system.

The Canon 800mm f11 lens is a real kick. It has limitations, high f stop, only focuses in the middle area of the image, not really weather sealed. Some advantages, cheap at $899, long reach, takes great, sharp pictures, autofocus with Canon R6 works great. I love it for taking pictures of small birds where the reach is a lot of help. I would not mess with the 600mm, go big with the 800mm, you can get 600mm other ways, but 800mm is special.

amfoto1 Loc: San Jose, Calif. USA

I would keep the 90D and trade in the 6DII.

I assume you would be getting one of the R-series cameras (and not the "other" Canon mirrorless... the M-series). The R-series so far are all full frame and to me it makes most sense to swap full frame for full frame, while keeping the APS-C DSLR for those times you want it for other things.

In fact, the Canon RP is sort of like a mirrorless version of the 6DII, using the same 26MP sensor but with all a different AF system and other "mirrorless advantages" (and disadvantages). The R uses the 30MP sensor similar to 5DIV. The R6 and R5 are another thing entirely. Both of those use the latest and greatest AF system from Canon (which some reviewers feel is one of the best AF systems from any manufacturer to date, though the new Sony may match it, though at a much higher price). R5 and R6 each use their own unique sensors: 20MP in the R6 and 45MP in the R5.

Keep the 90D because it's actually higher resolution than most of those full frame cameras and it's "free 1.6X teleconverter" effect can come in handy for a lot of things... especially sports, wildlife or anything where you might use powerful telephotos a lot. For example, you shoot with a Canon EF 100-400mm II, don't you? To have the same "reach" as that on any of the RF-mount cameras, you'll need to get the 600mm f/11, which is optically excellent and affordable, but nowhere near the build quality and versatility of the L-series lens you have now. The RF 600mm is mostly plastic to keep it light and relatively cheap. It's also not a zoom and has a fixed f/11 aperture.... two stops "slower" than your 100-400.

There are also still some advantages to using an optical viewfinder like your 90D's when shooting action with long telephotos. It can be easier to track and get on target, than with an EVF. Also, there's little to no drain while using the optical viewfinder to watch wildlife subjects, waiting for an interesting shot. Doing that with a mirrorless camera's EVF.... well, better have lots of extra batteries on hand. (I've gotten as few as 100 shots out of a battery with my M5, using the EVF "too much"... same battery as the RP uses, BTW.)

Plus you can get an estimated 1300 shots out of a battery in the 90D, where the mirrorless cameras are rated to get about 1/3 that many shots per battery. You have option of putting a battery grip on the 90D, too. There's a BG-R10 for use on the R5 and R6, as well as a BG-E22 for the EOS R. But Canon doesn't make a grip for the less expensive EOS RP, which needs a grip more than most, because it uses the smaller, lower capacity LP-E17 battery, while all the other R-series use the larger LP-E6N or E6NH (as used in both 6DII and 90D). There IS a Vello grip for the RP, but the camera isn't designed for one so to use that grip's shutter release requires an external cable.

Then there is price to consider...

6DII used are selling for approx. $850 to $1000 on eBay. After shipping and fees, probably $750 to $900 net to the seller.

MPB and KEH are selling used 6DII for $950 to $1050, but they probably pay at least 1/3 less than that to buy them. Probably $550 to $700 net to the seller or similar in-trade value.

If you have a lens for the 6DII like one of the EF 24-105mm versions, you may want to sell/trade that too, unless you need it for use on your 90D.

Canon RP with RF 24-105mm (non-L, STM version).... $1300.
Canon R with RF 24-105mm L USM.... $2900 (or $2100 w/non-L/STM lens)
Canon R6 w/RF 24-105mm L USM... $3600 (or $2800 w/non-L/STM version)
Canon R5 w/RF 24-105mm L USM... $5000

In my opinion, among the R-series cameras the 2+-year old EOS R or the more recent R5 seem the most logical "upgrade" from a 6DII. And I think the RP would be more of a lateral move from a 6DII, while the R6 would be sort of mixed bag... an upgrade for AF and a few other things, but also a resolution downgrade.

Alyn McConnaha Loc: Lebanon, IN

HELLO from Boone county. Nice place to take "pitchers."
I am a big Olympus fan; There are four sitting here on my desk.
Alyn

PHRubin Loc: Nashville TN USA

Several considerations.
Do you want one FF and one APS-C camera? I would think so since you do now.
Will you buy a FF or an APS-C mirrorless? There is the M series and rumor has it an R series APS-C coming soon.
Do you have EF (NOT EF-S type) lenses?

Answers to these should shape your decision.

JohnFenimore Loc: Oceanside, Ca

You might consider the Canon R6. It has a crop mode.