Tamron makes good lenses but the fact that there is robust demand for premium priced lenses (even f4) tells us that buyers believe in Canon magic.
I'm curious to see what the actual demand for these lenses is.
If they are priced close to what is indicated, then I don't expect that it is a big market - pros and some enthusiasts (I expect people
here enthusiastic about these lenses skew real world demand).
I'm curious to see who buys glass at this level without a "pro" body. The R is a fine camera, but clearly not a top of the line pro model. So will current R users pony up the cash for these? Will Canon introduce or announce the development of a higher end body?
Hmmm... the same kind of people who were placing GM lenses on the sony mk2 bodies?
I keep reading that the R is no pro body. And by canon's own standards even the 5D line was not "pro".
So... no dual cards, doesn't affect the images coming out of the camera.
So... no IBIS, but basically all DSLRs didn't have this.
So... no 8fps with live view update, but most people don't need this (though it is nice to have).
For anyone doing the bread and butter of all photography (in terms of making money), does the R deliver? Yes, yes it does. So you want good fast (for DOF) lenses that can produce great looking images. Check. IT DOES THAT VERY VERY well.
Would I get a pro body to meet my GAS and my addiction to tech to go along with these lenses if I pick up these lenses? Well yet... but not immediately, since it is simply nicer to know they are out there, then an absolute need (at least for me). I would rather do what any photographer of ol' would have suggested. Invest in lenses. Since I don't really see how a pro body would give me better looking images than the current R. Do you?
I guess that is the good question. Besides being faster, what value would a "pro" body give you over the R? IMO there would only be one type of pro body that might add value: higher MP. Of course dual slots would be for those wedding and event people, but for the most of us... the R is more than good enough.