R6 VS R3 Which camera is better?

davev8 wrote:

i say the R6 is "more likely" to have more FPS etc as we do not know what EF lenses the OP has and its a bit early for many real world tests with the R3 and EF vs RF glass but the general consensus with the R5/6 is they are better with RF glass than EF glass but EF glass works better on the R5/6 than on a DSLR..

All true and the EF glass I have worked even better on the R3. I will be surprised if there is any EF glass that works better on the R5/6. Based on the MS H+ speeds being limited on the R5/6 with some EF glass, but not on the R3, it appears that Canon has made an effort to make the R3 even more compatible with older lenses.

Just tested the EF 70-200 f/2.8 ii with 2x iii converter on the R3. It is really snappy when going from close to far focus and does Eye Af with ease. As stated previously, the EF 500 f/4 ii has quicker AF and the glass moves faster on the R3.

i think you are going to find some EF lenses that are hardware limited and no matter what body you have are not going to make them AF any faster..and any difference between body to body are probably not noticed in real life

There is a significant difference IRL in AF lock-and tracking between the cameras with the lenses mentioned above.

i would have to put my 5Dmki from 2005 side by side with the R6 to see if my EF85mmF1,8 af is any faster..it seemed instant on the 5D

you have to remember the OP is coming from a 6Dmkii with 5 fps and only the center AF point rated only to -3.5EV compared to -6 to 7 EV for ALL points for the R3/6 (this is not twice as good but 3 times better) only 45AF points clumped in the middle vs 4000+ over most of the frame, eye AF and tracking that will seam on another planet

so the R6 is a massive upgrade its huge over the 6Dii

so is the R3 but to realize any extra advantage of the R3 will be in extreme cases

The advantage will be significant in competitions which is what the OP says that he is getting the camera to shoot. Not only is the AF faster and stickier, but you get 30 FPS vs 12 FPS. So, you get more in-between shots.

the % of extra upgrades is slim for double the money for the OP use

It depends on how important getting THE shot is to OP. The R5 and R6 are fantastic cameras, bu the R3 is significantly better for fast action.

BUT the advantage still goes to the R6 with affording RF glass

RF Glass is better, but OP has EF glass that he can use now and convert to RF glass as his needs evole.

1 you always have AF over the full-frame with RF glass not always the case with EF glass

No. The RF 600 and 800 f11s do not allow full-frame coverage. What EF lenses are you saying offer less than full-frame AF points? I have full-frame AF points on all my EF glass.

2 its reported that IS/IBIS works better with RF glass

It does, but it is incremental.

3 RF glass is often sharper than the equiv EF glass

It depends on the lens.

4 often other advantages with RF glass like the aforementioned 70-200 its the most compact 70-200F2.8 available

Bu the EF 70-200 2.8 ii is close in IQ and that's a lot to spend for a smaller lens.

5 no adaptor to mess with and /increase size

Not a big deal.

6 i have already seen EF lenses drop in second-hand value (in UK) now would be a good time to change them..i imagine the decline will be faster when RF availability is back to normal