Lenses -> Sigma 18-35mm F1.8 DC HSM Lens - Pentax Fit
The Sigma 18-35mm f1.8 DC HSM Lens is the first wide-angle zoom lens (as of 22nd April 2013) to achieve a maximum aperture of f1.8 throughout the entire zoom range. The Sigma 18-35mm is a standard zoom lens that offers a focal range equivalent to 27-52.5mm in the 35m format. The 9 blade rounded diaphragm creates an attractive round bokeh at large-aperture settings, while the HSM (Hyper Sonic Motor) ensures a silent, high-speed AF. This lens incorporates a wide glass molded aspherical lens with Special Low Dispersion (SLD) glass to compensate for aberrations and curvature at the widest angle. Its new Global Vision design works with its compatibility with the Sigma USB dock for further customisation. Sigma's DC lenses are designed for cropped sensors and the image circle on this lens is designed to match the smaller size of the image sensor on small-frame sensor cameras (DX-format on Nikon and EF-S on Canon). The lens is ideal for landscapes, portraits, still life, snap shots, casual, and close-ups.
|Specification / Feature||Value||Scores *||Rank **|
|Number of Lens Groups||12|
|Number of Lens Elements||17|
|Optical Zoom ||1.94||4.43||64|
|Max Aperture ||1.8||86.97||10|
|Max Aperture Wide ||1.8||86.97||10|
|Max Aperture Tele ||1.8||70.01||10|
|Focal Length Wide ||18 (or 27 in full frame equiv.)||69.09||26|
|Focal Length Tele ||35 (or 52.5 in full frame equiv.)||44.28||53|
|Min Aperture ||16|
|Magnification Ratio ||0.23x||3.64||24|
|Min Focus Distance ||0.3m||95.85||23|
|Aperture Blades ||9||25.81||7|
|Autofocus Motor ||HSM|
|Sensor Format ||APS-C|
|1st/3rd Party ||3rd party|
|Lens Type ||Standard Zoom|
|Image Stabilisation ||No|
|Video Lens ||No|
|Tilt Shift ||No|
|Weather Resistant ||No|
|Filter Thread Size (mm) ||72mm|
|Included Accessories||Lens case, Petal type lens hood|
|Size (DxL) ||0mm|
|Lens Mount ||Pentax K (DA)|
|UK Price ||£649.00 at Amazon.co.uk (affiliate link)|
£649.00 at Wex Photo Video (affiliate link)
|US Price ||$799.00 at Amazon.com (affiliate link)||40.36||205|
* - Scores are calculated by comparing numerical specifications with other cameras. The highest ranking camera for a specification acheives a score of 100. The lowest ranking camera is scored as 0 and all the other cameras are scored in between 0 and 100 according to their merit.
** - Rank is calculated by ordering the scores for all cameras in descending order. The best scoring camera for a particular feature / specification will have a rank of 1.
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