if money isnt an issue, and weight isnt a issue, then you may want to consider how much you really gain from buying only primes....
... It also costs less than half and weights half.
keyword: " if money isnt an issue, and weight isnt a issue"
look at 200 F2.8 vs 70-200F2.8IS II at 200, you will not be able to tell any difference.
The 200mm f2.8 will have smoother bokeh and a bit better contrast.
this is news to me, I was under the impression that 70-200F2.8IS II used better elements than 200 F2.8 so it produces equally good IQ in all aspects. would you mind give me a link that shows this?
similar comparison can be made between 17-55 and several non-L primes in that range, such as 28 F2.8, 35 F2.8 and 50 F1.4.
35mm f2 you must mean. the 35mm f2 is a LOT smaller, a LOT lighter, a LOT cheaper.
thanks for the correction, I did mean 35 F2. and again, keyword is " if money isnt an issue, and weight isnt a issue"...
but on the issue of price and weight. my view is (which I know is not shared by everyone) buying a high end zoom is almost equivalent of buying several primes, which in the long run if you were to buy all these primes, you would have spent more money and if you wanted to use them all it would mean carry more weight.
by buying 17-55 F2.8, I do not have to buy 28 F2.8 35 F3, 50 F1.4 and the non-existent 17 f2.8, to me that is 4 primes in one. yes I lose around 1 stop of light on average, but I gain ring USM and 3 stops of IS, on top of the versatility of a zoom.
by buying a 70-200, one can avoid buying 85 f1.8, 100 f2, 135 f2, 200 f2.8 and if you buy a x2 extender you can also avoid buying 100-400. again there are trade offs but overall i think it evens out pretty well.
also note that canon aps-c lose around 40% light when using F1.4, and about 10% when using F1.8, that further undermines the value of buying fast primes.
Of course it does not. Not only do the primes allow for much shallower DOF, they also still are much faster than f2.8, even if there is a slight loss of light due to the sensor. And a lot less heavy still too.
the word "undermine" does not mean "completely negate". I am fully aware of other advantages of larger aperture, I believe OP understands them as well, therefore there was no need to discuss that in depth.