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What's sharper, Canon 20mm 2.8 prime or F4L 17-40?
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Re: What's sharper, Canon 20mm 2.8 prime or F4L 17-40?
http://slrgear.com/reviews/showproduct.php/product/31/cat/11 (Canon 17-40) http://slrgear.com/reviews/showproduct.php/product/80/cat/10 (Canon 20 2.8) Neither are flawless wide open, however by f/8 the difference is clear: The 17-40 beats the 20 2.8 in corner sharpness by a hefty margin, though neither are flawless.… -
Re: What's sharper, Canon 20mm 2.8 prime or F4L 17-40?
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Re: What's sharper, Canon 20mm 2.8 prime or F4L 17-40?
My 17-40 is sharper than the 20mm 2.8 that I've tried (on fullframe). The center of the 20 was really nice at f4, but the corners were much much worse than on the zoom. Too bad really, because the 20 has nice ergonomics and would team up really well with the 28 1.8, 50 1.4 and 85 1.8 if only it performed nearly as good as… -
Re: What's sharper, Canon 20mm 2.8 prime or F4L 17-40?
No. At f/4, the prime is slightly sharper mid-frame, but faster than that the picture gets fuzzy. I'd want a prime to be sharp in the center wide open, like the 35/2 or 24/2.8. And then the 17-40 beats the 20/2.8 at f/5.6 and beyond. I think the 17-40 is lightweight enough that in this particular comparison, all the 20/2.8… -
Re: What's sharper, Canon 20mm 2.8 prime or F4L 17-40?
The 20mm is a fine lens, but I don't think it's L sharp. Plus with the 17-40 you get the added versatility of the longer focal length. The 17-40 is much more suitable for walkaround stuff when you need wide. If I were you I'd try the 24mm f/2.8. The old non-IS one. It can be found for $250 used and it is really a bargain.… -
Re: What's sharper, Canon 20mm 2.8 prime or F4L 17-40?
Canon is not really known for ultra-wide sharpness. Their forte is in bokeh and L prime sharpness, that's about it. Having said that, the 20 f/2.8 and 17-40 are pretty decent, especially if you're stopping down a few stops as a landscape photographer. If you're shooting wide open as a photojournalist or star trail…
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