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.
SAM (Smooth Autofocus Motor)
Rather than using the focus drive motor in the camera body, SAM lenses feature an autofocus motor built into to the lens itself that directly drives the focusing element group. Since the built-in motor directly rotates the focus mechanism, operation is significantly smoother and quieter than conventional coupled autofocus drive systems.
The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene.
- Light, compact full-frame prime lens; ideal for portraits
- 127.5 mm (35 mm equivalent) focal length with APS-C sensor, ideal for general purpose mid-telephoto applications
- Smooth Autofocus Motor (SAM) for smooth AF operation
- Clear, sharp corner-to-corner imaging, even at maximum aperture
- Circular aperture for beautiful defocus effects
- Focus mode switch
- Supplied with lens hood
||35 mm full frame
|Focal Length (mm)
|35 mm equivalent focal length (APS-C)
|Lens Groups / Elements
|Angle of View (35 mm)
|Angle of View (APS-C)
|Maximum aperture (F)
|Minimum Aperture (F)
|Minimum Focus Distance
|Maximum Magnification ratio (x)
|Filter Diameter (mm)
|Image stabilization (SteadyShot)
|Dimensions (D x L)
||2-7/8 x 2-1/8" (70 x 52 mm)
||6.2 oz (175 g)
||"35 mm equivalent focal length (APS-C)" and "Angle of View (APS-C)" are with interchangeable lens digital camera incorporating APS-C type image sensors.
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