How should I resolve my birding GAS?

User1303423862 wrote:

drsnoopy wrote:

User1303423862 wrote:

Secondhand price on the M6ii is almost as high as new at the moment, and I don't think that'll change much anytime soon. I might buy my first ever brand new ILC.

I've found a possible lens option too. The Canon EF 70-300mm f4-5.6 IS II USM is as quick to focus as the RX 100-400, and I could use it on both the M6ii and EOS R at full resolution. It's a gamble so far as birding goes, because Canon say it isn't TC compatible. As you and I know, Canon may just be saying that for commercial reasons, rather than optical/mechanical reasons. But even if I can't get a TC to work with it, I could have a lot of fun at the motorcycle race circuits and up in the hills getting dramatic landscape angles. And squirrels, of course.

The EF 70-300 L definitely doesn't accept a Canon TC, there is insufficient room behind the rear element. It will apparently accept a Kenko TC, but with some AF issues.

Your 55-250 STM will work brilliantly on an R7 or R10 body, using the EF-RF adapter. My strong suggestion is to go with an R7/10, possibly by selling something. You aren't limited to "expensive FF RF lenses" as you can use any EF or EF-S lens. One very good lens to adapt is the 10-18STM which gives the UWA currently missing from the APS-C R range. You will be amazed at the AF on the new cameras, especially for birds whether perched or in flight.

I didn't know there was an L series 70-300. I can't find it searchng on the net.
I will be selling my M6 to upgrade, but the situation with the UWA zoom is one of the reasons I'll be staying with EF-M for the time being.

Canon EOS M6 II + EF-M 11-22 UWA Canon EOS R10 + EF-S 10-18 UWA

I've owned the EF-S 10-18mm IS STM. it has pretty good image quality but soft corners. The EF-M 11-22 IS STM is a noticeably sharper lens all around, even at 24 MP and especially with the 32 MP M6ii.  The ranges of the lenses are different -- obviously the 10-18 goes wider (which I miss a little) but the 11-22 also makes a better walkaround lens as the 22mm end is getting into the 'normal' range and I like that a lot.