[popo]

Canon are struggling a bit with their lower DR and slightly noisier sensors still with LPFs, (I don't know why, sorry Popo), however they've the best lenses..

No need to be sorry, it is well known that Canon sensors don't quite match the dynamic range of many others. But at the same time, it is not a problem for most people in most uses. It only applies to low ISO, once you get above 400 or so pretty much all current sensors are about the same. It wasn't that long ago, a few years perhaps, when everyone's sensors had about the same dynamic range. And I think almost everyone did ok then. Of course, there will be some situations where some more might help, so it wouldn't be something I'd say no to. On a related note, Thom Hogan recently ran a write-in This is most likely spam content of his readers asking them what the biggest problems were people wanted to solve in photography. Dynamic range and MP count were two areas which did NOT make it significantly on the list, no matter how much they get discussed on various forums.

 

Oh, having slept on it a bit, I should revise my answer to the original question a bit. For my main longer focal length shooting, it is still Canon. But I forgot one thing. I've always wanted body IS with fast primes which Canon obviously don't do. It isn't something I need often, but I do need sometimes. That does provide a tangible benefit for me, and the times I use short fast primes are not the times I need continuous AF tracking, so mirrorless would fill the gap there. I have debated this before, but the only bodies offering it were the higher Olympus models, and combined with the lenses available it wouldn't be full frame equivalent in shallow depth of field. I forgot there is now a new solution which is a better fit: the Sony A7ii.

 

The old kit in question would be:

EF 35/2

Zeiss 2/50 makro

Sigma 50/1.4 A

EF 85/1.8

EF 135/2

EF 135SF

 

Now it isn't as simple as buy the equivalent Sony FE lenses, since they don't exist. 35/2.8 so I lose a stop there, and a 55/1.8, both with a blue badge.

 

A quick check on the roadmap suggests a 28/2.0, Ziess 35/1.4 so it will be silly money, 90/2.8 macro OSS. To be fair, I don't really use the longer end of the range really, so I would be ok to only get a 35-ish and 50-ish. I can't remember the last time I even mounted the 85 on anything, and the 135 I only use for astrophotography.

 

One other alternative is to get a EF-FE adapter with electronic aperture control and I keep my lenses. This needs more research to make sure body IS still works fully with such a combo. I know AF performance is stated as poor with these adapters, but MF isn't out of the question in this use especially if the Sony does a good job with focus peaking.

 

A quick look over the fence at Olympus and Panasonic doesn't show any fast primes there (in FF equiv.) so that kinda rules it out.

 

And after all that, I think it is too much effort and cost and I usually end up sticking with what I have.