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Old Nov 7, 2010, 4:25 PM   #1
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Default Low-light Standad (APS-C): Canon 28mm f/1.8 vs. Sigma 30mm f/1.4 vs. Sigma 24mm f/1.8

Any thoughts on what lens to get for a standard low-light prime?


These are the lenses that seem to get the best reviews in the under-$1000 range:
  • Sigma 30mm f/1.4 (faster)
  • Canon 28mm f/1.8 (canon's own)
  • Sigma 24mm f/1.8 (1:2.7 macro)
I am particularly curious about the 24mm because I have not seen tests on it. Forums and shopping sites seem to have good reviews on it. (See, e.g., http://forums.dpreview.com/forums/re...9&changemode=1.)

Last edited by yohy; Nov 7, 2010 at 5:30 PM. Reason: adding details
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Old Nov 7, 2010, 5:45 PM   #2
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the sigma 24 1.8 is big and focuses super slow. its a bit archaic.

the sigma 30 1.4 is faster and sharper in the center, a nice lens. the canon isn't as sharp wide open but its a bit more even across the whole frame.
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Old Nov 7, 2010, 8:30 PM   #3
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If you plan on getting into FF, in the future. Got with the canon 28 1.8 over the 30 1.4, as the 30 1.4 is a crop sensor lens. It will not transition over to a 5D3.
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Old Nov 7, 2010, 11:41 PM   #4
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Quote:
Originally Posted by shoturtle View Post
If you plan on getting into FF, in the future. Got with the canon 28 1.8 over the 30 1.4, as the 30 1.4 is a crop sensor lens. It will not transition over to a 5D3.
Thanks... I actually was leaning toward the Sigma, but appreciate your comment because I think I will transition to FF. I still want to keep the crop sensor and smaller lenses for travel. Then again, the Canon is actually smaller and lighter than the Sigma!

Last edited by yohy; Nov 7, 2010 at 11:41 PM. Reason: spelling error
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Old Nov 7, 2010, 11:44 PM   #5
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if you do plan to transition to ff, then the 28 1.8 is the easy choice here and will be a good wide angle on ff. and it is quite small and light and makes for a nice normal prime on a crop as well.
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Old Nov 7, 2010, 11:50 PM   #6
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Quote:
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if you do plan to transition to ff, then the 28 1.8 is the easy choice here and will be a good wide angle on ff. and it is quite small and light and makes for a nice normal prime on a crop as well.
Thanks. I'm definitely leaning toward the Canon now.
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Old Nov 13, 2010, 2:00 PM   #7
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I can also recommend the canon 28/1.8 over the sigma. Great lens, fast autofocus and full frame for about the same price as the sigma.
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Old Nov 13, 2010, 2:09 PM   #8
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I loved mine on my 20D, sold it when I moved to 5D, and have regretted it ever since. I will likely be getting another soon.
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Old Nov 14, 2010, 3:23 PM   #9
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I keep hearing about these prime lens not being sharp wide open. How does the sigma 30mm and Canon 28mm compare to the Canon 15-85 3.5-5.6, all of them wide open. I would hope that the primes are at least as sharp as the zoom, even if they are not perfectly sharp.
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Old Nov 14, 2010, 3:49 PM   #10
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If you are printing avg size, you really will not notice but in sharpness between the 2 lenses. When you print very large or do 100% crop to examine. The it is a sharpness gain form 1.4-2.5 that the sig has. But to be honest, you can not shoot wide open daytime. It is just to bright. With either lens you will be shooting at 2.8 or better for outdoor work.

And they are sharper then a 3.5-5.6 at 3.5 or regular zoom. Unless you care comparing them to L lenses. Where they are so close at 2.8 or f4 that it is very hard to tell which is better.
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