Sigma 16 mm f/1.4 (C) AF DC DN Lens for Canon EF-M X Mount, Mirrorless

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If you want to eliminate some CA at f/1.4, you need to use something like Adobe’s eyedropper tool to select the color and then eliminate it. TheSigma 56mm F1.4 DC DN C isn't claimed to be a macro lens, but it delivers reasonable performance nonetheless. It has a minimum focusing distance of 50cm / 19.7in and a maximum magnification ratio of 1:7.4. With the Sigma 16mm, 30mm and 56mm F1.4 DC DN C lens wide open at f/1.4, you can see some obvious light fall-off in the corners. Stopping down helps, although to completely get rid of this phenomenon, you will need to use an f-stop of f/4 or smaller. Light Fall-off - Sigma 16mm F1.4 DC DN C Bokeh is a word used for the out-of-focus areas of a photograph, and is usually described in qualitative terms, such as smooth / creamy / harsh etc.

16mm F1.4 DC DN - SIGMA Corporation Support | 16mm F1.4 DC DN - SIGMA Corporation

I recommend that you take a look at the image galleries here to see more images that I took during the review.All in all there is a lot to like and little to criticize here. It’s a nicely made lens that has a premium look and feel to it. The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens. Thanks to the M50’s exceptional Dual Pixel Auto Focus mode, focus speed and accuracy was exactly the same between the two lenses. I thought that the Canon might have a slight edge over the Sigma (because third party lenses sometimes don’t perform as well), but thankfully that wasn’t a problem. Depth-of-field In our view, their efforts have been very successful, even with the 16mm wide-angle lens - see the examples below. Bokeh - Sigma 16mm F1.4 DC DN C With 16 elements in 13 groups, the optical system features a multitude of high-tech and high-end components, including three FLD glass elements, two SLD glass elements, and two moulded glass aspherical elements. This optical system minimizes optical aberrations and ensures outstanding resolution at wide-open aperture and throughout the aperture range. In particular, the two aspherical lens elements have ultra-high-precision surfaces polished to tolerances under 10 nanometers, minimizing the onion ring bokeh effect that some aspherical elements produce and ensuring clear image quality throughout the frame. In addition, the structure of the optical system gently bends light to minimize sagittal coma flare and deliver optimal optical performance from the center of the frame to the edges. The result is a smooth, round bokeh effect with ample light volume throughout the frame.

16mm F1.4 DC DN | C - SIGMA Corporation of America 16mm F1.4 DC DN | C - SIGMA Corporation of America

Save yourself some trouble and just shoot with the lens in APS-C mode. There aren’t really any benefits from doing otherwise. Chromatic aberrations, typically seen as purple or blue fringes along contrasty edges, are more of a problem with the Sigma 16mm and 30mm than with the 56mm F1.4 DC DN C. Chromatic Aberrations - Sigma 16mm F1.4 DC DN C To test this out, I mounted the Canon M50 on a monopod and took a walk. The Canon M50 has digital image stabilization, so I was curious to see if there was any difference using a lens (like the 11-22mm) that has internal stabilization versus a lens without it. To test, I turned Digital IS on and off for both lenses and shot comparison footage to see how they compare.I don’t consider this lens a top choice for astro, but I made a few images with it that night that I like a lot, so won’t hesitate to use it in that fashion in the future. A Good Video Option

Sigma 16mm, 30mm and 56mm F1.4 DC DN C for Canon Review Sigma 16mm, 30mm and 56mm F1.4 DC DN C for Canon Review

The 16mm DN is a very strongly performing lens, with a lot of resolution available even at wide apertures. In real world shooting I was very happy with the results, with a lot of good detail showing up at a pixel level. The sharpness is also nicely even across the frame, with fairly good edge performance (important for landscape photographers). Wide open (f/1.4) the center performance is stronger than the corners, but neither are the corners mushy, either. There is a bit of veiling (lower contrast) wide open that I traced to a fairly common problem with wide aperture lenses – some axial (or longitudinal) chromatic aberrations. Unlike lateral chromatic aberrations, which often appear near the edges of the frame as green and purple fringing on both the top and bottom of things like, say, tree branches or other high contrast subjects, axial CA (LoCA) occurs when not all colors focus equally. It typically appears as purple fringing before the plane of focus and sometimes also with some green fringing after the plane of focus. Lateral CA is mostly unaffected by aperture, and will appear at most aperture values. Axial CA is often “fixed” by stopping the lens down to smaller apertures, as the depth of field increases and there is less variance between the focus of the colors. The Sigma 16mm, 30mm and 56mm F1.4 DC DN C for Canon EF-M lenses are exactly the same in terms of their design, construction and features as the versions for Sony E-mount and Micro Four Thirds, just with a change of mount.With Canon now concentrating most of their R&D efforts on their full-frame mirrorless camera range, and on continuing their DSLRs for at least the near future, we wouldn't be surprised if the EF-M 32mm is the last APS-C lens that they release for quite some time. The mount features a special sealing to make the lens an excellent choice in a wide variety of conditions.