With the right lens profile and software, lateral CA is often easily correctable (often in the camera) by radially shifting the colors to coincide. This button also acts as a custom button (C5) and can be programmed to another function using the camera's menu.

Flare and ghosting are caused by bright light reflecting off of lens elements' surfaces, resulting in reduced contrast and sometimes-interesting but often destructive artifacts. This Sony-mount lens is not compatible with Sigma teleconverters, though the Leica L-mount DN lens version is compatible with the Sigma Tele Converter TC-1411 At the top of this comparison priority list is the Sony equivalent model, the FE 100-400mm f/4.5-5.6 GM OSS Lens. Thus, long story short, if you don’t already own one of these lenses, and you currently shoot Sony mirrorless or Panasonic/Sigma/Leica mirrorless, …just get this new Sigma!

Sigma 100-400mm f/5-6.3 DG OS HSM C Aperture range

The following is a review of the Sigma 100-400mm F/5-6.3 DG OS HSM Contemporary lens which was released in February of 2017 as part of Sigma’s affordable “Contemporary” lens lineup. The introduction of the Sigma 100-400mm F/5-6.3 DG OS HSM C lens is a logical one for the company as it competes in a market segment that remains unexploited by the likes of Canon and Nikon. I don’t really need to break this section down into individual groups of photographers like I usually do. Whether you photograph action sports, any type of racing, wildlife, or whatever else is often captured with such a telephoto zoom range, then you should consider the Sigma 100-400mm. Sigma 100-400mm DN, Sony A9 II | 400mm, 1/320 sec, f/6.3, ISO 100 In general, lenses are not as sharp in the periphery, where light rays must be bent more strongly than in the center. Or, there are some subjects that you may not want to get closer to, and this focal length range is there for you in that regard. Above: At first glance the new version looks a lot like the old one, and the similarities go more than skin-deep, but there are a number of key differences and Sigma states the DG DN version is indeed a new design, made specifically for mirrorless. The 86mm diameter is the same as the older DSLR model, but at just under 200mm in length, it’s actually 15mm longer – but if you were to mount the DSLR model via an adapter to a mirrorless camera, it would become a little longer still.

The second group of lenses is made up of other 80/100-400mm zoom lens offerings, of which only the Sigma 100-400mm f/5-6.3 HSM DG OS C is in the same price range as the Tamron lens. Indeed, the Sigma 100-400mm C is the Tamron’s closest competitor, and the two lenses offer a very similar feature set overall. The Tamron benefits from having a fully weather-sealed construction and better focusing performance. When it comes to which lens is sharper, both models have some distinct advantages, though the overall impression is quite similar. Generally, the Tamron is a bit sharper centrally from 100mm to 300mm, while the Sigma generally offers better corner sharpness. At 400mm, the two lenses are incredibly similar, with the Tamron a hair sharper in the center of the frame at f/6.3, and the Sigma a hair sharper at f/8. The Sigma also maintains a slight advantage in the image corners at the 400mm setting. NIKON D780 + VR 100-400mm f/4.5-6.3E @ 400mm, ISO 400, 1/500, f/6.3The effect of different colors of the spectrum being magnified differently is referred to as lateral (or transverse) CA (Chromatic Aberration). The bottom line is that this lens has a relatively narrow aperture at any specific focal length, and this lens is not an ideal choice for stopping low light action or for focusing in low light conditions. Allowing more light to reach the sensor permits freezing action and handholding the camera in lower light levels and can also permit use of a lower (less noisy) ISO setting. Above: For example, here’s a shot from about 1.2m taken with the Sigma which could only keep it in focus at a focal length up to 116mm.