Sony Alpha E-Mount Distagon T* FE 35mm f/1.4 ZA Lens
Bright, wide, full-frame ZEISS Distagon.
In addition to being a great choice for snapshots and landscapes, this bright f/1.4 35mm full-frame ZEISS Distagon lens facilitates handheld shooting indoors in low light, as well as night scenes. Shallow depth-of-field at larger apertures and a 9-blade circular aperture design make it easy to create smooth background bokeh for portraits or bridal snapshots.
There's a whole spectrum of imagery that only a large f/1.4 aperture can create. A minimum focusing distance of 30cm makes it useful for shooting images of flowers and similar subjects as well.
Sharp and clear from corner to corner
Precision Sony AA (advanced aspherical) technology and ZEISS T* coating contribute to excellent optical performance, achieving outstanding corner-to-corner resolution.
For low-light shooting and smooth bokeh
f/1.4 maximum aperture captures clear images in low light. That and a 9-blade circular aperture enhance this lens's capability for stunningly beautiful background bokeh.
DDSSM for quiet focus speed and precision
DDSSM (Direct Drive SSM) precisely and quietly positions the heavy full-frame focus group for optimum focus even within the lens's shallowest depth of field. Ideal for movies as well as stills.
Only the middle groups of the optical system are moved to achieve focusing, which leaves the total length of the lens intact. 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 using a polarizing filter.
Optimized for movies as well as stills
An aperture ring with switchable clicks can be turned ON for tactile feedback when shooting stills or OFF for smooth, quiet operation when shooting movies.
Unmatched T* (T-star) coating
The fact that lens coating technology -- vapor deposition of a thin, even coating on the lens surface to reduce reflections and maximize transmission -- was originally a Carl Zeiss patent is well known. The Carl Zeiss company also developed and proved the efficacy of multi-layer coatings for photographic lenses, and this is the technology that became the T* coating.
Aspherical lens elements
Spherical aberration is a slight misalignment of light rays projected on the image plane by a simple spherical lens, caused by differences in refraction at different points on the lens. That misalignment can degrade image quality in large-aperture lenses. The solution is to use one or more specially shaped "aspherical" elements near the diaphragm to restore alignment at the image plane, maintaining high sharpness and contrast even at maximum aperture. Aspherical elements can also be used at other points in the optical path to reduce distortion. Well designed aspherical elements can reduce the total number of elements required, thus reducing overall lens size and weight.
In general, if an aperture uses 7 or 9 aperture blades, then the shape of the aperture becomes a 7-sided or 9-sided polygon as the aperture is made smaller. However, this has a certain undesirable effect in that the defocusing of point light sources appears polygonal and not circular. Alpha 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.