« on: January 06, 2014, 08:19:17 PM »
I use that ancient Canon 50 F/1.4 and fight through its 'hunty' focusing because it delivers sharper images than the 50 F/1.2L (as I rarely shoot wider than F/1.8 ). From F/2.8 to F/4, it's a super sharp lens, but it has a boatload of limitations. This Sigma might address a host of them.
I wish this was smaller though. The size of the 35 1.4 is what has kept me from buying it. I want a small and inconspicuous prime. Getting a large lens merely for the f/1.4-2.8 is not worth it (STRICTLY in my case). I WILL buy a smaller Canon 50 f/1.4 if only they give it a darned ring USM!
That lens is a 2014 lens for certain. It's called Canon's new 50mm non-L. It will be an 'non-L IS refresh' like the 24/28/35 before it -- ring USM, internal focusing (no length change), better build quality, much sharper, and with IS. Probably $799 to start and walk down to $599 after the first year (all of the other non-L IS refreshes showed this behavior).
It will be much smaller than Sigma's new offering (I imagine roughly as big as its 'twin', the 35mm F/2 IS), but I would wager not quite as sharp. But keep in mind that each of the non-L refreshed were big sharpness improvements to their 1990s predecessors, but the 35 F/1.4 Art lens was even sharper than those. I expect that trend to continue.
So I'm still waiting for that new Canon 50 to stack up against this new Sigma. If it is only 90% as sharp but has IS and is as small as I think it will be, I'd take the Canon 10 times out of 10.