Sony FE 50mm F1.8 review: Affordable choice
The new lens features the traditional double-Gauss design with 6 elements in 5 groups. With a minimum focus distance of 1.48’ (0.45m), however, it also features an aspherical element, which is unusual at this level. As you might expect, there are some concessions compared with the high-end models. For autofocus control, this lens eschews the normally quiet and quick linear and direct-drive SSM actuators in favor of a DC motor and unit focusing. Potentially more of a concern is that lens has been designed to focus at the taking aperture, rather than opening up to focus at
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