Sigma 24-70mm F2.8 DG DN Art Sony E Mount 578965

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Even so, while the Art series lens consistently beats both the earlier EX model and the pricier Nikkor lens, we noticed some astigmatism (where the horizontal and vertical acutance lines aren’t always close) at 24mm, and sharpness levels drop at 70mm.

24-70mm f/2.8 Review: Perhaps Not Just a Rehoused Sigma Leica 24-70mm f/2.8 Review: Perhaps Not Just a Rehoused Sigma

In addition, the front lens element features a water- and oil-repellant coating that helps the lens perform well in the rain, near water, and in other challenging conditions. I’ve rated the features with a [+] (or [++]), when it’s better than average or even state of the art, a [0] if it’s standard or just average, and [-] if there’s a disadvantage. From our tests, it is clear Sigma prioritized sharpness across the frame (that is, the image field) at each focal length and aperture over outright sharpness, something that we’re seeing more frequently with modern designs. Since large-diameter zoom lenses are often used at wide-open aperture, SIGMA has paid close attention to the shape of the bokeh, aiming for perfect circularity. It's definitely a mixed bag and the impact will largely depend on the kind of photography the lens is used for.The graph below shows the degree of corner shading visible in images from the three lenses at their longest focal length and widest aperture (when it will be most noticeable).

24-70mm F2.8 DG OS HSM | Art | Lenses | SIGMA Corporation 24-70mm F2.8 DG OS HSM | Art | Lenses | SIGMA Corporation

does not recognize the profile completely: vignette is compensated as it was set in camera (but you cannot switch between off and auto in post-processing) while CA-compensation is always ON, distortion compensation always OFF. Aspherical lenses necessitate refined expertise in the design and manufacturing of advanced, high-performance lenses. At the prototyping stage, SIGMA used not only simulations but actual photographic experiments to assess flare and ghosting under multiple criteria, identify the causes of these issues under a wide range of situations, and take measures to mitigate them.A hydrophobic and oleophobic coating on the front lens element helps to resist rain drops and accidental smudges. This allows for very precise manual focus and does not make smooth focus pulling for videographers too hard.

Sigma 24-70mm f2.8 DG DN Art review | Cameralabs Sigma 24-70mm f2.8 DG DN Art review | Cameralabs

If you crop you change DOF and increase noise, no matter if you do that with a smaller sensor, cropping the file, or even if you crop a printed image. When using a circular polarizer filter with narrow apertures (typical for landscapes and cityscapes), OS can be helpful even under a full sun. Even previously undetectable high-frequency details are now within the scope of our quality control inspections.Video shooters will also find great value in this lens with its constant aperture and useful focal range, which allows for the creation of some unique focus/zoom pulls that cannot be achieved when working with prime lenses. options, the Leica 24-70mm has no image stabilization (IS) built into the lens; all three companies seem satisfied with relying solely on sensor-shift stabilization with this particular zoom range. The good news is that it's only really a concern where there are strong specular highlights, and it's quite easily resolved simply by stopping down a little. The degree of distortion is enough to be visible when shooting geometric subjects, but is only obvious at 24mm, and it's not difficult to correct this in raw processing software. For E-mount, there's only one direct rival but several other lenses which are at least in the same ballpark.