The built-in Optical SteadyShot image stabilization system provides a 4-stop (approx.) shutter speed advantage, making it significantly easier to succeed in crisp, blur-free images and video . Features 35 millimeters equivalent focal length (APS-C) is approximately 75 millimeters
From the Manufacturer
E 50mm F1.8 OSS Prime Lens
This 50mm mid range telephoto lens offers a focal length that may be perfect for portraiture and a range of other subjects, a bright F1.8 maximum aperture, Optical SteadyShot (OSS) image stabilization and impressive image quality, all in a surprisingly compact and lightweight package. Add responsive, quiet autofocus and aperture operation, and you have got a lens that may be ideally suited to shooting movies in addition to stills.
When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can also be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can also be obtained consequently.
Lens-based optical image stabilization
Gyro sensors built into the lens detect even the slightest movement, and the stabilization lens is precisely shifted to counteract any image blur that might occur. The usage of precision, quiet linear motors and technology inherited from high-end Sony professional camcorders results in exceptionally quiet, effective image stabilization that contributes to high-quality movies in addition to stills.
Only the middle groups of the optical system move to succeed in focus, so the overall length of the lens does not change. Other important benefits include fast autofocusing and a short minimum focusing distance. Also, the filter thread at the front of the lens does not rotate, which is convenient if you’re the use of a polarizing filter.
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Built-in Optical SteadyShot image stabilization and 7-blade circular aperture for beautiful defocus effects
Minimum Focus Distance : 1.28 ft (0.39 m), Maximum Magnification ratio : 0.16x, Focal-Length : 50 mm and filter diameter (mm) is 49 mm
Large F1.8 maximum aperture enables beautiful defocusing effects. Angle of View (APS-C) : 32°
“Compact, lightweight mid-range telephoto prime with elegant aluminum alloy exterior.Diaphragm Blades 7, Rounded”
In-the-box: Hood (ALC-SH116), Lens front cap, Lens rear cap