The Sony FE 100mm f2.8 STF GM OSS is a unique 100mm mid-telephoto lens featuring STF (Smooth Trans Focus) technology that can elevate portraits and subjects that benefit from smooth background bokeh to new artistic heights while boasting G Master resolution. It also offers close-up capability with up to 0.25x magnification and fast, precise and quiet autofocus. Optical SteadyShot™ image stabilization minimizes blur.
Direct Drive SSM (DDSSM) for fast, quiet, precise focusing
TheSony FE 100mm f2.8 STF GM OSS lens supports both contrast AF and focal-plane phase detection AF, and has a high-precision Direct Drive Super Sonic Motor (DDSSM) system that ensures exceptionally fast, quiet and accurate AF performance. The focusing system’s double linear motor takes on the vital role of providing high-speed actuation for the AF contrast detection system when shooting video.
Selectable Macro mode – two lenses in one
Besides being a perfect portrait lens, the Sony FE 100mm f2.8 STF GM OSS incorporates a convenient ring-switch on the lens barrel to select from full range to a macro range. With close-up focus capability up to 1.87ft. (0.57m) min. and 0.25x max. magnification. It’s like having two lenses in one.
Manual aperture ring w/ selectable on/off click for stills or movie
A responsive manual aperture ring offers positive action that will satisfy professional photographers and moviemakers alike. The aperture ring click stops can be switched on or off as required. “Off” is the preferred setting for moviemaking since it results in the least aperture operation noise. When “On” the ring provides tactile feedback that is useful when shooting stills. Since this lens incorporates an apodization (ADP) lens element, the aperture ring is calibrated for F-stops and T-stops.
11-blade circular aperture contributes to gorgeous bokeh
The 11-blade circular aperture maximizes the beauty of this large-aperture prime-lens, contributing to impressive images in which the subject stands out against a smoothly defocused foreground and background bokeh as well as perfectly round points of defocused light. Conventional aperture blades have flat sides creating unappealing, polygonal shaped defocused 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 dramatically reduces spherical aberration
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.
Super ED glass w/ multi-coating reduces flare and ghosting
The refined optical design includes an ED (Extra-low Dispersion) glass element which dramatically reduces chromatic aberration and provides superior contrast across the entire image, even at large aperture settings, resulting in corner-to-corner sharpness.
Nano AR coating suppresses reflections, flare and ghosting
Sony’s original Nano AR Coating technology minimizes flare and ghosting, for dynamic range that achieves lifelike detail and gradation with advanced camera sensors. This precisely defined regular nano-structure allows accurate light transmission, contributing to high-quality images, even more so than with lenses that use coatings with an irregular nano-structure. The reflection suppression characteristic of the Nano AR Coating is superior to conventional anti-reflective coatings, providing a notable improvement in clarity, contrast, and overall image quality.
Internal Focus maintains lens dimensions
Only the middle groups of the optical system move to achieve focus, so the overall length of the lens does not change when focusing. This is especially important when using for video recording. 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 when using a polarizing filter.
