Image Softness with Sigma 30mm f1.4 Wide Open

Started Mar 29, 2011 | Discussions thread
Michel F Senior Member • Posts: 2,003
Re: its just not sharp

The bottom line is that this lens had quality control issues and sample variation was a problem. I say "had" because it may or may not have been fixed. I loved my first sample but foolishly sold it to buy a Nikon 35mm f/1.8 which just didn't do it for me. After that, it took me 3 samples of the Sigma to get a really good one. The images are usable at f/1.4 and at f/1.8, it's just as sharp as the Nikon 35mm I used to have. Thom Hogan probably had a sub par lens.

edwardaneal wrote:

from Thom hogans review of the 30mm f/1.4

"Sharpness: The weakness of this lens, and the reason I'm agnostic about a recommendation, is that it simply isn't up to Sigma's best standards in terms of resolution. The lens is quite soft wide open (abysmally so in the corners)"

Other lenses like the Nikon 35mm f/1.8, 35mm f/1.4 & 24mm f/1.4 seem to do much better wide open so clearly it is not an issue with all fast wide angle lenses

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My kit - D200, 10.5mm f/2.8D, 35mm f/1.8G, 50mm f/1.4G & 70-300VR
SB800, SB600 and other misc lighting equipment

Lenses worth mentioning owned and sold– 12-24 f/4, 17-55 f/2.8, 35-70 f/2.8, 80-200 f/2.8, 20mm f/2.8, 35mm f/2, 50mm f/1.8, 50mm f/1.4D, 60mm f/2.8D, 85mm f/1.8, 105mm f/2D-DC, 180mm f/2.8, 300mm f/4D-ED

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