Sony Alpha E-Mount FE 24-70mm f/4.0 ZA OSS Zoom Lens
A compact mid-range zoom that delivers outstanding
performance for full-frame format E-Mount cameras.
This compact full-frame Sony FE 24-70mm F4 ZA OSS covers a 24mm to 70mm range with a constant maximum aperture of f/4, enabling consistent exposure settings at any focal length. The FE 24-70mm is a premium lens that can deliver superlative image quality with full-frame E-mount cameras, and dust/moisture resistance means consistently reliable performance.
Five aspherical elements and one ED glass element in a state-of-the-art optical path suppress aberration for outstanding clarity and beautiful rendering throughout the zoom range. The acclaimed Carl Zeiss T* coating controls reflections for superior contrast, and a circular aperture creates smooth background bokeh with natural highlights.
Constant F4 maximum aperture throughout the zoom range
A constant F4 maximum aperture throughout the zoom range allows the user to use optimum exposure parameters that will create the desired "look" at any focal length. The ability to use F4 at the telephoto end of the zoom range also reduces the need to use high ISO settings, and allows the use of high shutter speeds to capture action when necessary. A circular aperture design helps to deliver smooth background defocusing.
A compact mid-range zoom that delivers outstanding performance
This compact, high-performance 35mm full frame format mid-range zoom lens has been specifically designed bring out the full performance potential of the Alpha series full frame E-mount bodies.
Optical SteadyShot image stabilization
Optical SteadyShot image stabilization provides a marked reduction in image blur caused by camera shake, especially when shooting handheld at telephoto focal lengths or in dim indoor lighting. In the Anti Motion Blur and Handheld Twilight modes this technology makes it easier than ever to shoot clear, blur-free, low-noise images at night, indoors, or in any conditions that would otherwise be a challenge due to low light conditions, without having to boost sensitivity.
Dust and moisture resistant design
Critical areas of the lens exterior feature dust and moisture resistant seals that help to ensure professional reliability even in tough environmental conditions.
Unmatched T* (T-star) coating
The T* (T-star) coating contributes to typically outstanding Carl Zeiss image quality, with high contrast and uniformly excellent resolution right out to the image edges. The coating subdues reflections at the lens surfaces, increasing transmission and minimizing flare and ghosting that can compromise rendering. Natural color reproduction and impressive presence give subjects a lifelike quality. Five aspherical elements and one ED (Extra-low Dispersion) glass element in an advanced optical design reduce aberration and distortion to a minimum.
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.
ED (Extra-low Dispersion) glass element
As focal lengths get longer, lenses built with conventional optical glass have difficulties with chromatic aberration, and as a result images suffer from lower contrast, lower color quality, and lower resolution. To counter such problems, ED glass was developed and is included in select lenses. It dramatically improves chromatic aberration at telephoto ranges, and provides superior contrast across the entire image, even at large aperture settings.
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.
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.