![]() ![]() Thanks to our knowledge of lens design accumulated over a long period of time plus the latest lens manufacturing techniques, SIGMA has finally made the dream of a zoom lens with F1.8 throughout its entire focal range come true. It has enabled us to develop a wide glass-molded aspheric lens, and the incorporation of SLD (Special Low Dispersion) glass has optimized power distribution of the optical elements and compensated for various aberrations as well as curvature of field at the widest angle. In addition, the technological innovation at our Aizu factory also contributes to better lens production. In order to compensate for astigmatic aberration across the entire focal range, we have relied on the experience and know how gained when designing our super wide angle zoom lenses such as SIGMA12-24mm F4.5-5.6 II DG HSM and SIGMA 8-16mm F4.5-5.6 DC HSM. As the aperture value gets larger, the depth of focus becomes shallower, thus it makes the lens design extremely complicated in order to compensate for various distortions, such as spherical, axial chromatic and astigmatic aberration along with curvature of field. ![]() Separating itself from the pack, this zoom features an exceedingly bright f/1. Requiring a larger image circle for full sensor coverage, these cameras will show vignetting when the 18-35 is mounted to them.īut, perhaps not as much vignetting as you might expect.To achieve a wide zoom lens with a maximum aperture of f1.8, various technical problems need to be overcome. The Sigma 18-35mm /1.8 DC HSM A lens is a wide-angle to standard zoom lens designed for APS-C crop-sensor cameras. Distinguished by a uniquely fast and versatile design, the Sigma SA-mount Sigma 18-35mm f/1.8 DC HSM is an Art-series zoom, covering wide-angle to normal focal lengths. Using the Sigma 18-35mm f/1.8 DC HSM Art Lens on a Full Frame Bodyīeing a "DC" lens, the Sigma 18-35 f/1.8 is designed to cover the image circle of APS-C format cameras.īut, this lens mounts and functions on full frame camera models. Note the difference in background blur possible from the max aperture of the lens you have or are considering compared to the Sigma 18-35mm f/1.8 DC HSM Art Lens' capability. Is the effect of diffraction, causing increasingly less-sharp results across the frame as the lens opening is redcuced. ![]() The downside to selecting a very narrow aperture (narrower than the camera's DLA) Narrowing the aperture (selecting a higher-numbered aperture setting), results in more depth of field. This zoom features an exceedingly bright f/1. The 35mm examples, with their narrower angle of view, have a more-diffusely-blurred background than the 18mm examples. The Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon EF is a zoom lens with a range of 18-35mm for APS-C in Canon EF mount. The Sigma 18-35mm f/1.8 DC HSM Lens is an Art-series zoom, covering wide-angle to normal focal lengths. Expired: Also Hot: Save 20% on New EF and TS-E Lenses at Canon USA The Sigma 18-35 mm F1.8 DC HSM I Art is the only zoom lens in the world with a constant F-number of 1.8.In Today's B&H Deal Zone: Slik Pro CF-834 Tripod – Only $189.95 (Save $160.00).Expired: Ending Today: 20% Off Refurbished Lenses (After Instant Savings) at Canon USA.In Today's B&H Deal Zone: Tokina atx-i 11-20mm f/2.8 CF Lens, Lexar 256GB 1066x CompactFlash, Lowepro m-Trekker BP150 Backpack, SmallRig.Just Posted: Alpine Astro Baader AstroSolar BDSF 3.8 Digital Solar Filter Review. ![]() The Sigma 18-35mm 1.8 DC HSM is the first. In Today's B&H Deal Zone: Platypod Platyball Ergo Ball Head – Only $189.00 (Save $110.00), More Sigma 18-35mm f/1.8 DC HSM A Series Art Lens - Canon EF Mount (p/n 210954) sigma18-351.8canon / 210954. The Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon is a wide-angle to normal-length zoom lens that features a fast, bright constant f/1.8 maximum aperture.The definitive large-aperture APS-C format standard zoom lens. Image quality until now found only in a fixed focal length lens. World’s first lens offering F1.8 throughout the zoom range. It’s the first lens in our modern age to maintain that open of an. 18-35mm F1.8 DC HSM Art Lenses SIGMA Corporation Introducing a newlarge-aperture APS-C format standard zoom lens. Thats a slight exaggeration - I manage to use some of my Canon EF lenses successfully on the X-T2 with a simple mechanical adapter. Sony EDU Deals at B&H – Save 15% on Select Cameras and Lenses These emotions have been running wild since Sigma announced their new 18-35mm f/1.8 DC HSM lens. The loss of AF could be compesated but you also lose the control over the aperture making it essentially useless. ![]()
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