Reviews and Problems with Sigma 18-35mm f/1.8 DC HSM
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Lens Test: Sigma 18–35mm f/1.8 DC HSM
1 November 2013
Excerpt: When the announcement of Sigma’s new 18–35mm lens arrived, some of our staffers chuckled upon opening the e-mail. Why? Because of what appeared to be a typo in the headline: Instead of f/2.8, it quoted f/1.8 as the maximum aperture! But as we read further, we learned the joke was on us: The lens is the industry’s first f/1.8 constant-aperture zoom, and thus the fastest. It comes in mounts for Canon, Nikon, Pentax, Sigma, and Sony DSLRs.
Summary: The Sigma 18-35mm F1.8 DC HSM is an extraordinary lens, offering prime-level image quality in the fastest zoom ever made for SLRs. Its 28-50mm equivalent range is a little limiting though, and inconsistent autofocus means that it can be difficult to make the most of the excellent optics when shooting at large apertures.
Pros: Super fast constant F1.8 maximum aperture, Excellent optics, even wide open, Fast, silent autofocus, Solid build quality without being over-heavy, Compatible with Sigma's USB dock and Optimization Pro software
Cons: Restricted zoom range, Needs detailed AF microadjustment for best results, Inconsistent autofocus in difficult conditions even after microadjustment, Physically rather large for a standard zoom
Excerpt: The Sigma 18-35mm f/1.8 is a true game changer. I may not be a technical guru, but I love to snap pictures. I use my camera every day, and am always looking for new, incredible equipment that enhances my ability to capture a moment. For me, and I am sure many of you are coming from a similar place, the tech side can be a bit overwhelming and over my head, but this really isn’t how I go about choosing a new lens.
Conclusion: Credit must be given to Sigma for taking the plunge and being the first to pull off this optical feat. Despite being a touch heavy - especially for a lens intended for smaller APS-C format D-SLRs - the 18-35mm impressed us in almost all areas of testing. So, if you're in the market for a well-built zoom that offers impressive image quality and great control for shallow depth-of-field effects, it's a great choice - provided you can stomach the Â£650 pricetag.
Excerpt: The Sigma 18-35mm F1.8 DC HSM lens has a wide focus ring. There are hard stops at both ends of the range, making it easier to set focus at infinity. Polariser users should be pleased that the 72mm filter thread doesn't rotate on focus.