The Sony SAL-135F18Z 135mm f/1.8 Carl Zeiss Sonnar T* AF Lens from Sony is a bright Alpha lens with a maximum aperture of f/1.8. This wide maximum aperture provides very shallow depth of field, as well as smooth blurred bokeh background effects in your images. Its 135mm focal length is the 35mm equivalent of a longer 202.5mm telephoto lens when used on cropped APS-C sensor cameras. It is constructed of 11 elements in 8 groups, as well as two Extra-low Dispersion (ED) glass elements, which all help to deliver sharp, clear photos. It has a minimum focusing distance of 2.4′ and a front-end filter diameter of 77mm.
Aperture Range: f/1.8-22
With a maximum aperture of f/1.8, you can capture faster shutter speeds and get a shallower depth of field than lenses with higher maximum apertures.
For Alpha & Maxxum DSLRs
Optimized for Sony Alpha cameras, this lens becomes the 35mm equivalent of a 202.5mm lens when attached to smaller cropped APS-C cameras.
2x Extra-Low Dispersion (ED) Elements
To reduce chromatic aberrations, most noticeable when zoomed all the way in, the extra-low dispersion glass corrects for certain wavelengths of light – producing sharper images with truer colors.
Carl Zeiss T* (T-Star) Coating
This Carl Zeiss lens features T* (T-Star) coatings that reduce the lens flare, internal reflections and light scattering that can otherwise occur on the surface of the lens’ glass elements.
9x Circular Aperture Blades
Circular aperture blades produce smooth, rounded bokeh background effects when capturing spot-light sources in your pictures. Because the aperture blades form a near circle at the wide openings used for low-light shots, spot-light sources have a pleasing circular defocused effect.
Filter Diameter: 77mm
The 77mm from filter thread does not rotate, allowing rotating polarizing filters to be used.
Focus Hold Button & Auto Clutch
This lens is made with a Focus Hold button and Auto Clutch, which offer better focus control whenever you need it. Switch between auto or manual focusing to more speed or precision, then lock the focus ring during AF, so as not to interfere with focusing when your hand is holding the lens and focus ring.