Sigma 18-35mm f/1.8 DC HSM Lens Reviews (performance is impressive)

Sigma 18-35mm

Sigma 18-35mm f/1.8 DC HSM
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The world fastest zoom lens (for APS-C sensors) with a fixed aperture, the Sigma 18-35mm f/1.8 DC HSM got reviewed. The lens, part of Sigma’s “Art” line-up, caused some hype when it was announced. Sigma called it UFO (Unbelievable F-stop Object). Some hands-on here and here.

Focus Numerique (google translated) tested a pre-production model, and writes:

The results of the new Sigma zoom are impressive and worthy of a professional optical 24×36 mm that opens to f / 2.8 constant! Of course, the best results are obtained with medium apertures between f / 5,6 and f / 8, though the sharpness is present in larger openings also. However there was a decrease of sharpness between the center and edges of images with larger apertures and f / 1,8 particularly.

Digifoto (no translation from Flemish) writes:

We were surprised again after seeing the test photos. You expect from a zoom lens at fully open aperture somewhat lesser performance in the corners. The Sigma 18-35mm f/1.8 however scored exceptionally well, even at the 18mm f/1.8 corner tightened remains very good. The bokeh of the lens looks very stylish, and distortion remains well within bounds.

Image samples of the Sigma 18-35mm can be seen at Dpreview.

[via SAR]

Sigma 18-35mm f1.8 DC HSM First Impression By The Phoblographer

Sigma 18-35mm f1.8 DC
Image credit: The Phoblographer

The Phoblographer got their hands on Sigma’s recently announced UFO (Unbelievable F-stop Object), the amazing 18-35mm f1.8 DC HSM lens with a constant f/1.8 aperture over the whole zoom range. Moreover, the lens can be connected to Sigma’s USB dock to update firmware. The main points of The Phoblographer’s impression:

  • very good build quality
  • ease of use
  • speedy and accurate focusing
  • about image quality they write:
    • We weren’t allowed to put a card into the camera because this is a prototype lens, but the images that we saw weren’t so contrasty or punchy. It also seemed a bit soft wide open–and for that reason we’re going to blame that on it being a pre-production copy.
[via The Phoblographer]