Had the same dilema..... then bought the Nikon 35mm 1.8, brilliant lens.
Know that doesn't help you though, sorry


We had this dilemma when we wanted to get some 50mm f/1.4 lenses. From the reviews I've read, I gather that the Sigma is the better performer when it's wide open, but the Nikon is better stopped down. Personally I thought wide-open performance was more important, so I went with the Sigma. And I'm glad that I did. It's a decent lens, good build quality, and it's physically impressive too.
Anna - Nikon is Nikon! It's hard to beat. I have the 50mm Nikkor af-s f/1.4 - and it's fab - don't settle for anything less! Nikon often costs more for a reason!
Well, you might. One often-overlooked advantage of fast lenses is a lovely bright viewfinder, whatever aperture you're using. But if that were your motivation then you might as well use a 50mm f/1.8, which is probably just as good at f/8 and loads cheaper.Also the point you make on there is a good one, you generally don't use a f1.4 prime lens stopped down at f8![]()

Anna - Nikon is Nikon! It's hard to beat. I have the 50mm Nikkor af-s f/1.4 - and it's fab - don't settle for anything less! Nikon often costs more for a reason!
AWP - have you actually used the Sigma? Firstly it's the more expensive lens. It has faster AF than the Nikon (but not by much, this is info from people who have tested both) and from what I can see has better bokeh.
Now I haven't used the Nikon 50/1.4 AF-S, I have the Sigma and I love it. I wouldn't trade it for the Nikon, no way.
Isn't the sigma alot larger than the Nikon?
No it doesn't
I wonder if it is worth me getting that too, would be 50mm equiv on cropped sensor, not that I have any idea what an uncropped sensor looks like, being too young in my photography experience for film (and too poor for full frame digi). I did have a Poloroid when I was a student though![]()
As Canon & Nikon tend to create very similar performing 50mm primes, I think my Canon vs Sigma comparisson may be valid.
DP Review test and resolution sesults.
Nikon 50mm F/1.4
edit:
It seems that I incorrectly posted the stats for the old Nikon AF 50mm. The newer AF-S 50mm does a much better job against the Sigma wide open.
Nikon AF-S 50mm F/1.4
In the meantime the Nikon has performed perfectly since day 1 and was £100 less. Like this:
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I want a 50mm prime for Xmas
See I think I do want a 50mm ... I really do like the 50mm having thought about it properly.
I find 50mm a quite restrictive focal length on an APS-C camera...
I use the 35 way more than the 50, so I'd seriously consider this lens too.
I went for the 35mm too ... I'd rather move a little closer to my subject than having to try and move back.