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Santa gave me a new lens (and a camera) to play with…here is a quick test.

Notes:

Nikkor costs ~100Euro and Sigma ~370Euro.
Nikkor does not focus on small Nikons (D40,40x,60) but Sigma does.
Sigma is huge

All tests done with Nikon D90 , no sharpening on camera, jpeg (so you won’t see any CAs) large, no PP.

All crops are 100%.

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I recently bought a Sigma 30mm f/1.4 to accompany my Nikon D60.

At first I was disappointed with some severe issues with front focus. It was really bad since I could see it even at long range photos. But, the local Sigma service point did it’s best and tweaked the sigma to my body. The results was astonishing. A strange thing is that Sigma overexposes about 0.7EV. But you can fix that (if you want) quite easily by setting a -0.7EV on your camera.

On the comparison there are various shots from f/1.4 to f/16 and all are compared to the Nikkor 18-55 VR. The last, is the normal kit lens that comes with the D60 and it’s quite good.

You can see below the Original image (scaled) taken at f/8 with the Sigma (EV-0.7).

Ready to see the tests ? Read on…

Olympus E-3 with Sigma 24mm f/1.8 vs Olympus E-410 w/ DZ 14-45 f3.5-f5.6 @ ISO 100, f/5.6, Natural Settings (Same settings for focusing, metering etc).

Olympus E-3 with Sigma AF 24mm f/1.8 EX DG Aspherical — FRONT/BACK
FOCUS TEST @ f1.8

Aperture Tests on SIGMA AF EXDG 24mm f/1.8 (100% Crop) with Olympus E-3 (ISO 100, Custom WB)