Recensione Sigma 50-150mm f/2.8 EX DC OS HSM Usato
Sigma 50-150mm f/2.8 EX DC OS HSM is a zoom lens that allows you to obtain sharp images also using it with the maximum opening of 50 mm to 150 mm proving perfect and efficient in any situation. The limitation of the diffraction is set to f/11 and there is a clean practical impact reduced on the sharpness of iMeging up to f/16 while it is more significant to complete arrest at f/22.
The lens is made up of 21 elements that separate the subject and the sensor but there is no chromatic aberration except in the form of green fringes and magenta in the high contrast areas especially in the extreme corners of the image. The shading or vignetting is only presented with f/2.8 lens. In this way you can see slightly darker corners than the center using the lens at 150 mm, while at other focal lengths the corners are less dark. In other positions and focal openings, no vignetting effects are noticed.
The distortion remains at a very low level for a zoom lens. However, there is a slight barrel distortion when the lens is used between 50-70 mm (+0.4%) and a slight bearing distortion when using zoom at 100-150 mm (0.2% ). At 80 mm, on the other hand, it is a mild change that it is irrelevant.
The functioning of the automatic focus has been studied and built with Sigma's HSM specifications, the focus is performed hypersonically, this means that it is extremely fast but also quiet. It takes less than a second to go from the close focus to infinity. The automatic movement is obtained only with a compatible body otherwise it will not work.
Ideal for : Sigma 50-150mm f/2.8 EX DC OS HSM for photographers of different levels of preparation thanks to the versatility of the lens.
At the moment Sigma 50-150mm f/2.8 EX DC OS HSM it is not available in RCE stores.
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