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Old Apr 13, 2010, 5:13 PM   #11
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The ef 50mm 1.4 is not a bad lens at 1/5 the price of the L. If you want something better then the 50mm 1.8, some say the sigma 50mm 1.4 is better the the canon 50 1.4 others say no at 1/3 the price of the L. But it is a consensus that both the canon and sigma 1.4 are very good lenses, but L but very good.
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Old Apr 16, 2010, 6:15 AM   #12
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Quote:
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If you want something better then the 50mm 1.8, some say the sigma 50mm 1.4 is better the the canon 50 1.4 others say no at 1/3 the price of the L...
On a full-frame the Sigma is indeed better: http://www.dpreview.com/lensreviews/..._c16/page5.asp
-> Check out its size, the Sigma 50 f/1.4 is as large as the 50 f/1.2L (2nd page of the review)!


Last edited by NHL; Apr 16, 2010 at 6:20 AM.
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Old Apr 16, 2010, 6:30 AM   #13
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On a full-frame the Sigma is indeed better: http://www.dpreview.com/lensreviews/..._c16/page5.asp
Yes, the Sigma is sharper in the edges and corners wide open, but the vignetting is worse throughout the aperture range. Pick your poison.

Canon EF 50mm f/1.4 USM (Tested)
Sigma 50mm f/1.4 EX DG HSM (Tested)
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Old Apr 16, 2010, 6:33 AM   #14
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Quote:
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On a full-frame the Sigma is indeed better: http://www.dpreview.com/lensreviews/..._c16/page5.asp
-> Check out its size, the Sigma 50 f/1.4 is as large as the 50 f/1.2L (2nd page of the review)!

That is the biggest reason I got the 1.4 it is an excellent 50mm prime but still small
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Old Apr 16, 2010, 6:46 AM   #15
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Thanks guys, these are very useful links. I just wish someone was shooting with at least one of them on FF so I could see what to expect in the real world with someone who I trust.... yes I've found some for the Canon on the web but not the same as someone you know.

I am liking the idea of the Sigma but my dad will need to get it in the UK and check focus etc while I'm not there... that's the hard part as I like to do these things myself and my camera shop knows me so less of a problem............ hmmmmm
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Old Apr 16, 2010, 9:14 AM   #16
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Well on my film body, the canon 1.4 is allot sharper then the 1.8. But that is on film.
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Old Apr 16, 2010, 5:52 PM   #17
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a
Quote:
Originally Posted by TCav View Post
Yes, the Sigma is sharper in the edges and corners wide open, but the vignetting is worse throughout the aperture range. Pick your poison.

Canon EF 50mm f/1.4 USM (Tested)
Sigma 50mm f/1.4 EX DG HSM (Tested)
How do you figure????
The delta between the center of the frame to the corner is .75EV on the Sigma while the delta between the center of the frame to the corner is a full 1EV and start even earlier (f/1.8 may be...)

i.e. more pronounced differences between brightness(center) and darkness(peripheral) on the Canon
-> Make sense with the larger exit pupil of the Sigma as opposed to the smaller glass on the Canon...


Sigma:

Canon:


The Sigma is better in every way and I plan to get it for my A900 which makes it stabilized even...
I already have a Canon 50mm f/1.4 (with a terrible CA in bright light!)

Last edited by NHL; Apr 16, 2010 at 6:04 PM.
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Old Apr 16, 2010, 8:50 PM   #18
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Ok, I rounded off. At f/1.4 and f/2.0, the Sigma is much better. At f/2.8, f/4.0, f/5.6, f/8.0, f/11, and f/16, the Canon is much better.
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Old Apr 17, 2010, 6:19 AM   #19
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For my use it is the sub f2.8 settings that are crucial and actually more like the sub f2 as I want to be able to do more natural light indoor work at weddings etc. I'm also waiting to see what the 85mm f1.4 is going to be like from Sigma as these would make a great combo.
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Old Apr 17, 2010, 6:35 AM   #20
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Exactly!

-> At sub f/2 the Canon 50mm f/1.4 went off the chart (and could be much worse than 1.25EV if extrapolated) in "vignetting".

Why upgrade from the f/1.8 then if the lens will be used stop-down?

Last edited by NHL; Apr 17, 2010 at 6:37 AM.
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