Sigma 18 35 1.8 test12/15/2023 ![]() ![]() Surprisingly given its price, the Sigma 18-35mm F1.8 DC HSM ships with a good quality soft case and also a plastic petal-shaped lens hood. Rear of the Sigma 18-35mm F1.8 DC HSM lens The lens doesn't change in length when zooming from 18mm to 35mm.Ī clear distance scale in both feet and meters runs from the closest focusing distance of 0.28m / 0.92 ft to infinity.įront of the Sigma 18-35mm F1.8 DC HSM lens ![]() Full-time manual focus override is also available at any time simply by rotating the focus ring. The main exception is the lack of built-in Vibration Reduction, although the very fast maximum aperture of f/1.8 makes up for this.įocusing is usefully internal and manual focusing is possible when set via the Focus switch on the lens barrel. In terms of features, the Sigma 18-35mm F1.8 DC HSM offers all the basics that you need from a standard zoom lens. Top of the Sigma 18-35mm F1.8 DC HSM lensīottom of the Sigma 18-35mm F1.8 DC HSM lens Side of the Sigma 18-35mm F1.8 DC HSM lens The focus ring is pleasingly wide and ridged for easier grip. The optical elements are made of high-grade glass. It also incorporates a brass bayonet mount that's supposed to be more durable. The lens has a plastic shell with a mixture of metallic parts and a new compound material, TSC (Thermally Stable Composite), used inside. The Sigma 18-35mm F1.8 DC HSM lens mounted on a Canon EOS 700Dīuild quality is excellent given the relatively affordable price tag. As seen in the photos below, it complements a camera like the Canon EOS 700D / Rebel T5i very well. Weighing in at 810 grams and measuring 12cm in length, the Sigma 18-35mm F1.8 DC HSM is a big lens given its modest focal length. The Sigma 18-35mm F1.8 DC HSM lens is currently available for £799.99 / $799.99 in the UK and the US, respectively. It has a minimum focusing distance of 28cm /11.0in and a maximum reproduction ratio of 1:4.3, while the HSM (Hyper Sonic Motor) ensures a silent, high-speed AF function. The Sigma 18-35mm F1.8 DC HSM features a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas of the image. It offers the equivalent angle of view as a 27-52.5mm lens on an APS-C DSLR (depending on the crop factor). This is just 2 quick tests with FoCal, but the Sigma 18-35mm F1.8 DC HSM A lens has shown excellent relative sharpness across the aperture range and reliable autofocus consistency.The Sigma 18-35mm F1.8 DC HSM is the first ever zoom lens to offer a maximum aperture of f1.8 throughout its focal range. In real use, this equates to negligible difference between shots. The chart below shows the results for the test, with all points scoring within 3% of the best point. The performance of the Sigma 18-35 f/1.8 lens on a Canon 7D body is very good to excellent, with a Consistency of Focus of 98.6% (anything over 98% is considered very good). (Note that this test is not available in the current version of Reikan FoCal, but will be coming soon…) Focus Consistencyįocus consistency shows how well a camera and lens combination will focus on the same spot when multiple pictures are taken. the EF 24-70 f/2.8L) which are far more expensive. The performance of this lens across the aperture range is excellent, reflecting what we’ve seen from the latest Canon lenses (e.g. So you can be sure you’re getting the sharpest shot even when shooting stopped down (for more information about Focus Shift take a look at this article, which includes examples of how it affects images). Tthe copy of the lens we tested is sharpest at around f/3.2, but it’s still very sharp wide open without much drop off in image quality at all (you can see this by the fact that there isn’t much of a curve between the diffraction limited aperture (the red line), and the far left point which shows the quality at f/1.8).įocus shift is shown on this graph by a difference in position between the diamond markers and the square markers, and on this chart they pretty much overlay, which means this lens exhibits no focus shift. Aperture Sharpness and Focus Shiftįirst off, the Aperture Sharpness/Focus Shift test. This is by no means a full review, just the results of couple of quick tests we had a chance to run with this shiny new lens. We had an opportunity to do a few tests with Reikan FoCal and one of these lenses yesterday, and the results match up with the excellent reviews this lens has been having. This is a really exciting lens as it’s the first to have a such a wide fixed aperture of f/1.8 across the whole zoom range. Unless you’ve been hiding under a rock, you’ll have heard of the new Sigma 18-35mm F1.8 DC HSM A lens that’s now available. ![]()
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