From the Manufacturer
20mm F2.8 Wide-Angle Prime Lens
This rigrously corrected lens gives you a wide angle of view for images that benefit from dramatic perspective with minimum distortion. It’s an ideal choice for covering spread-out scenes that you can’t get far enough away from to cover with a “normal” lens. Meticulous attention has been paid to minimizing flare and internal reflection in this advanced design, with the result that excellent sharpness and contrast are maintained through the image.
When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can 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 be obtained as a result.
Rear focusing elements
Only the rear groups of the optical system move to focus the lens, which allows for speedy AF operation and a shorter minimum focusing distance. Since the front of the lens does not rotate, operability is improved when shooting with a polarizing filter attached.
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20mm f2.8 wide-angle lens
Visual accuracy from 10 inches to infinity
Coated optics for clarity and definition
Rear focusing system for fast autofocus response
Circular aperture for defocused effects
Specification: Sony SAL-20F28 20mm f/2.8 Wide Angle Lens for Sony Alpha Digital SLR Camera
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Amazon.com Price: $748.00 (as of 17/10/2021 05:51 PST- Details) Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.