QUOTE(SkylineFreak @ Sep 13 2013, 06:04 PM)
If you don't shoot fast-paced photography using the 50mm f/1.4, I would say it's a pretty solid lens.
I love it much more than my previous 50mm f/1.8 and I use it much more frequently than my 24-105L, but that's just me.
You usually have all the time in the world to focus properly when shooting portraits.
Picture in spoiler was taken recently using my 6D + 50mm f/1.4 @ 1.4, 1/100, ISO1600. Sorry for noob photography.
Wanted to use Flickr but it is down for server maintenance at the moment.

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focus n recompose bro. even my mark3's outer system also cannot be trusted. lol. my 6D's outer point? almost the same like the mark3's. focus n recompose is better. or better yet, manually!

QUOTE(mingyuyu @ Sep 13 2013, 06:11 PM)
Was going to say the same thing. but getting correct focus at f1.4 using manual focus is quite hard (since sigma lenses have common problems of missing focus), many people hold back their purchase because of this.
ekceli ar..with today's high def screen at the back of the cameras, its very easy to spot a misfocus. like the 6D n 5D3, one click can 100% zoom edi wor..so to check f/oof areas is very easy. my many years of using the sigmalux @1.4, u just have to check, n know how to use it oni. hear the focusing..if it stops hunting while u half-press the shutter button (i press it alot of time, until stops hunting), then oni i take a shot. check image > if its sharp, then its a keeper. if its not, then take again loh

shooting high aperture needs a learning curve. some people focus one time n click shutter then complaint how oof the lens is.
try n focus manually with a 1.4 lens see how good is ur eyes.
there's a time that i practice a lot of manual focus even on assignments. train my own eyes.
but then again, with today's lcd, easy to check focusing maa