Sharing my notes...
If I were to consolidate a few cameras (I'm selling 3-4 of them) into one newer one, which would it be?
My current main cameras are Fuji GFX 100 and Sony a7 IV. I sold the a1 as wasn't really using the extra resolution or speed, but mainly because of the risk of crazy depreciation now the new one is out... We'll come back to that in a moment though.
I see the EOS R6 Mark II is currently on sale for 1800 euros brand new, which seems like a good deal but then you realise a used EOS R5 costs about the same now as it's 4 years old.
Given the R5 does 4K/120p, internal 8K RAW, higher resolution stills, oversampled 4K from 8K, whereas the R6 Mark II is... erm... newer, maybe less overheating issues, the R5 starts to look like a better buy.... Although the R6 II has a much more convenient movie/stills switch and a proper mode dial.
Main drawback of RF cameras for me is the poor performance of IBIS when used with adapters and manual focus lenses. It almost stops working entirely. Same goes for EOS R3, and the R5C lacks IBIS entirely.
Now let's compare to Nikon
Z6 III is 2500 euros / dollars. It is very similar to the EOS R6 Mark II in most regards but the lens mount is more flexible and you get better IBIS no matter the lens. 6K, 4K120fps (cropped?), but is it better than an EOS R5?
Z8 would make more sense for me... but now we're in the 3500 euro range.
It's an exciting camera but at that price, we're back at looking at a used a1 surely? E-mount for me has more going than Z.
Problem is the Sony a1 used is still £3200/3800euro/dollar, so it hasn't come down much yet since the a1 II announcement... Better to wait until it has reached the 2500-3000 range, at which stage it's a no-brainer and would be my choice over everything else mentioned so far.
The 8K codec internally, is a match for Canon RAW and N-RAW in my experience.
The a7 IV is best bang for buck... 1400 used, for a camera with very little missing... No 4K120fps of course, and rolling shutter is higher than something like the Z6 III. 4K/60p is a crop, but I'm still more of a 24fps guy and it does that very well.
A9, the original one... is about the same price. If you don't mind the lack of LOG, 10bit codec, H.265, new colour profiles and 4K/60p, the a9 is very capable especially for stills. It's the only one that has a fast enough electronic shutter for under $1500 to truly be a silent stills camera like the Z8 and Z9.
Now to the latest and greatest, and we have to go to $5k-$7K realm... Doesn't seem worth it to me?
The mid-range is just so good now.
EOS R5 Mark II is an evolutionary update. EOS R3 doesn't do as much as a Z8 when it comes to video + IBIS issues. Z9 is trumped by the smaller and cheaper Z8 for the same spec. The A1 II and a9 III are just too crazy expensive, although really cutting edge.
Which would you choose between $2k-3.5K?
A7R V gets a shout?