Sony FE 55mm f1.8 Sonnar T* ZA Lens

SKU:SEL55F18Z UPC: 027242868175

$998.00

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$998.00




49mm
Filter Size
f/1.8
Aperture
N/A
Stabilized
FE
Mount
Quick and Compact
Get the extra speed and brightness of a large F1.8 maximum aperture in a conveniently compact design, plus high performance 55mm full frame format. This Carl Zeiss® Sonnar T* fixed focal length prime lens provides the perfect pair for Alpha a7 Series full frame cameras.

Circular Aperture
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.

Aspherical lens elements
Aspherical lens design dramatically reduces spherical aberration while also reducing lens size and weight. Spherical aberration is a slight misalignment of the light rays projected on the image plane. This is caused by differences in refraction at different points on conventional spherical lenses which degrade image quality in large-aperture lenses. Specially shaped “aspherical” elements near the diaphragm restore alignment of light rays at the image plane, maintaining high sharpness and contrast even at maximum aperture and 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 in the lens, thus reducing overall size and weight. Advanced Aspherical (AA) elements are an evolved variant, featuring an extremely high thickness ratio between the center and periphery. AA elements are exceedingly difficult to produce, relying on the most advanced molding technology to consistently and precisely achieve the required shape and surface accuracy, resulting in significantly improved image accuracy and quality.

Carl Zeiss T* (T-star) coating
Coated optics were pioneered by Carl Zeiss® -- and this superb lens features the Carl Zeiss T* (T-Star) coating that virtually eliminates lens flare, internal reflection and light scattering that can otherwise occur at glass-to-air surfaces. The T* coating contributes to outstanding image quality, with high contrast and uniformly excellent resolution right out to the image edges. Not simply applied to any lens -- the T* symbol only appears on multi-element lenses in which the required performance has been achieved throughout the entire optical path, therefore guaranteeing the highest quality.

Internal focusing
Only the middle groups of the optical system move to achieve focus, so the overall length of the lens does not change. Other important 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.

Internal focusing
Only the middle groups of the optical system move to achieve focus, so the overall length of the lens does not change. Other important 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.

Optics/Lens Specifications
Lens Mount Type : Sony E-mount (Full Frame)
Minimum Focus Distance : 19.7" 0.5m
Lens Groups-Elements : 5 groups, 7 elements
Filter Diameter : 49mm
Lens Type : Sony E-mount (Full Frame)
Lens Weight : 10 oz. (281 g)
Aperture (Max.) : f/1.8 (constant)
Aperture (Min.) : f.22
Aperture : Circular
Maximum Magnification : 0

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