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Sony Alpha 135mm F1.8Z

Optical Characteristics

With a 35mm equivalent focal length of 102.5mm, this lens offers a Telephoto perspective.

Recommended Applications

*Recommendations are based only on the features necessary to perform the application successfully and do not take into account the relative image quality of different lenses.

Portraits

Portraits are best shot with focal lengths between 85 and 300mm depending on whether shooting mid=length or close-ups and the amount of spacial compression wanted. Depth of field is the most important tool to manipulate and a fast lens will give more scope for creative treatment.

High Foreground to Background Compression of Static/Slow-moving Subjects

High focal lengths reduce the perceived distance between foreground and background or they can be used for better magnification of subjects that are not possible to get closer to. When operating telephoto lenses at 500mm or above focal lengths without image stabilisation or camera support, it is necessary to use shutter speeds over 1/500 sec, making those lenses only suitable for daylight exposures.

Technologies

Circular Aperture

Circular lenses overcome the problem of point light sources appearing polygonal and not circular by utilizing 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.

Focus Button

Hold button once focus has been adjusted on the desired part of the frame, pressing this button on the lens barrel will hold focus if you wish to recompose the shot. Alternatively, depth of field preview can be assigned to this button through the camera's custom setting menu.

Distance Encoder

The distance encoder is a lends 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. The distance encoder plays an integral part in ADI flash mastering, which delivers high-precision flash metering that is unaffected by the reflectance of subjects or backgrounds.

Specifications

35mm equivalent focal length range:202.5mm
Lens perspective: Telephoto
Minimum aperture: f22
Image stabilisation: In-Camera Stabilisation
Ultrasonic Motor: None
Special lens elements: 11 Elelments in 9 Groups
Filter Size: 77mm
Weight: 985g
Dimensions: 88.0 x 114.5mm
Maximum magnification: 1/1
Recommended applications: Portraits, High Foreground to Background Compression of Static/Slow-moving subjects

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