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10-30-2013, 02:39 PM   #1
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Sigma 50 f1.4 EX DG HSM

The Sigma 50 f1.4 is on sale in my area this coming weekend for $350.00 usd with a trade in . Is this lens worth an extra $170.00 over the cost of the Pentax DA 50 f1.8 ? The Pentax is on sale until 10/31/13 and has a good review on this site . The Sigma seems to be hit or miss according to reviews . Any recommendations from any owners would be welcomed .

10-30-2013, 03:47 PM   #2
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I don't own this lens, but I have used it on Nikon FF. My cousin seems to have a pretty good copy. That's a bargain price for a 1.4 lens. 1.4 is pretty usable on an APS-C camera. For a FF I'd say it's probably not worth the difference, but on APS-C it is worth the extra ~1/2 stop of light and thinner DOF.
10-30-2013, 04:37 PM   #3
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Things the Sigma 50 F1.4 will give you for the $170:

1) F1.4 vs 1.8
2) Silent HSM focusing motor vs screw-drive
3) Very sharp lens, sharp enough wide open, sharper than almost any other 50 when stopped to F2 or F2.8.
4) "Quick-shift" - not the same as the Pentax quick-shift, but close enough.
5) A petal hood.
6) More weight

My Sigma 50 F1.4 is my second favorite lens. I will only replace it with a DA*55 F1.4. I enjoy using it for almost everything I do - the image quality at F1.4 to F2.8 is amazing and I have no qualms using it at those apertures. The only weakness is that my k-x is not the most accurate AF camera, and shooting at F1.4 can be difficult.

Shot at F2, look between the eyes

Full size 12MP image from my k-x: http://farm9.staticflickr.com/8336/8095858455_3c5b9d0a94_o.jpg
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