Designed for the full frame cameras, the Sigma 24-70 HSM is becoming popular among many users. It comes with a focal length of 24mm and it comes on a compact construction. This design comes with an overall length of 94.7 cm and it is ideal for a number of situations ranging from landscapes, snapshots and portraits.
Like other Sigma lenses, the Sigma 24-70 HSM comes with a super multi layer coating that eliminates ghosting and flare and at the same time to offer high quality image. It also comes with Extraordinary Low Dispersion (ELD) glass elements and two SLD (Special Low Dispersion) glass elements as well as three aspherical lenses to offer correction on all aberrations.
With the Sigma 24-70 HSM, the superior quality performance is ensured all through the zoom range. With it the users will benefit from the quiet and high-speed autofocus as well as a smooth manual focusing. The lens has a minimum focusing distance of 38 mm as well as a magnification ratio of 1:5:3. It also comes with a diaphragm with 9 blades to create an attractive out of focus blur.
The users will also benefit from the sharpness and accuracy of the Sigma 24-70 HSM lens. The sharpness will be seen in all apertures and focal lengths. However, it will drop sharply at 70mm when it is wide open. The users can avoid this by stopping down to at least f/4 so that they get the best images.
Like other Sigma lenses, the Sigma 24-70 HSM comes with a super multi layer coating that eliminates ghosting and flare and at the same time to offer high quality image. It also comes with Extraordinary Low Dispersion (ELD) glass elements and two SLD (Special Low Dispersion) glass elements as well as three aspherical lenses to offer correction on all aberrations.
With the Sigma 24-70 HSM, the superior quality performance is ensured all through the zoom range. With it the users will benefit from the quiet and high-speed autofocus as well as a smooth manual focusing. The lens has a minimum focusing distance of 38 mm as well as a magnification ratio of 1:5:3. It also comes with a diaphragm with 9 blades to create an attractive out of focus blur.
The users will also benefit from the sharpness and accuracy of the Sigma 24-70 HSM lens. The sharpness will be seen in all apertures and focal lengths. However, it will drop sharply at 70mm when it is wide open. The users can avoid this by stopping down to at least f/4 so that they get the best images.
At the 40mm and 70mm, the users will not have any issues with aberrations, although they are visible at 24mm. Fortunately, they can control this by using of the camera's built-in software or investing in additional computer software. With the Sigma 24-70 HSM, the users will also benefit from good subject separation even though the standard zoom is not meant for portraits.
With the 9 rounded aperture blades, the background highlights will maintain their circular shape in the entire aperture range. However, the Sigma 24-70 HSM can show significant outlining, especially when the lens is used wide open. The best way to avoid this is to ensure that there is a substantial distance between the subject and the background.
In conclusion, the users will enjoy the compact size of this lens as well as its light weight. The HSM and FTM feature also eliminates the appearance of dual focus clutch mechanism as seen in the predecessor. The Sigma 24-70 HSM comes with a quiet and fast autofocus mechanism and an easy manual focusing.
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