Sony FE 135mm f/1.8 GM Lens

Highlights: 

• E-Mount Lens/Full-Frame Format
• Aperture Range: f/1.8 to f/22
• XA Element, Super ED and ED Elements
• Nano AR and Fluorine Coatings
• XD Linear Motor AF System
• AF/MF Switch; Internal Focus
• Two Focus Hold Buttons
• Physical Aperture Ring; De-Click Switch
• Dust and Moisture-Resistant Construction
• Rounded 11-Blade Diaphragm

Over View: 

Prized for its ability to isolate focus, the FE 135mm f/1.8 GM from Sony is a medium telephoto prime characterized by its bright and sophisticated design. The f/1.8 maximum aperture excels in low-light conditions and also offers increased control over depth of field for working with selective focus techniques. The advanced optical design incorporates two extra-low dispersion elements, including one Super ED element, to reduce chromatic aberrations and one XA (extreme aspherical) element, which significantly controls spherical aberrations for a high degree of image sharpness and clarity. Additionally, a Nano AR coating has been applied to limit ghosting and lens flare for increased contrast and color fidelity when working in strong lighting conditions.

Complementing the optical assets, this lens is also notable for its inclusion of an 11-blade circular diaphragm to produce smooth, soft-edged bokeh with selective focus imagery. For controlling focus, an XD Linear Motor system is employed that is quick and quiet, and also lends more responsive control for manual focus operation. The lens also sports a dust- and moisture-sealed design to support shooting in inclement conditions and dedicated focus hold buttons, AF/MF switch, and manual aperture ring lend further control while shooting.

• As part of Sony's esteemed G Master series, this lens is designed to achieve notably high resolution and sharpness through the correction of a wide variety of spherical and chromatic aberrations. Additionally, these lenses feature robust and intuitive-to-handle physical designs to benefit both photography and cine applications.
• Medium telephoto prime designed for full-frame E-mount mirrorless cameras, this 135mm f/1.8 is also compatible with APS-C models where it will provide a 202.5mm equivalent focal length.
• Bright f/1.8 maximum aperture benefits working in difficult lighting conditions and also offers a wealth of control over focus position when using shallow depth of field techniques.
• One XA element is incorporated into the optical design, which features superior surface precision for effective control over astigmatism, field curvature, coma, and other spherical aberrations.
• Two extra-low dispersion elements, including one Super ED element, are featured in the lens design and help to reduce chromatic aberrations and color fringing for improved clarity and color neutrality.
• A Nano AR Coating has been applied to reduce surface reflections, flare, and ghosting for increased contrast and color rendering in strong lighting conditions.
• An XD Linear Motor system and internal focus mechanism provides quick, quiet, and precise autofocus performance and also contributes to more natural, intuitive manual focus control. An AF/MF switch is located on the lens barrel for tactile control over this setting.
• Two customizable focus hold buttons are present on the lens barrel for intuitive tactile control and rapid access to select settings.
• Physical aperture ring can be de-clicked for smooth, silent aperture switching to benefit video applications.
• Dust- and moisture-sealed design better permits working in inclement conditions and rubberized control rings benefit handling in colder temperatures.
• Fluorine-coated front element resists dust, moisture, and fingerprints and is easy to clean.
• Rounded 11-blade diaphragm contributes to a pleasing bokeh quality when employing selective focus techniques.

An F1.8 135 mm prime with superb resolution, bokeh, and AF

Unsparing application of Sony's most advanced optical technologies has produced a large-aperture prime telephoto lens that delivers outstanding corner-to-corner resolution even at F1.8, plus exquisite bokeh that is a hallmark of the G Master series.

XA and Super ED elements deliver high resolution

XA (extreme aspherical), Super ED (extra-low dispersion) glass, and ED glass elements precisely deployed in an advanced optical design effectively correct aberration, while a floating focus system works with these aberration correction measures to ensure that the highest possible resolution is maintained right out to the image edges throughout the lens's focus range.

Narrow depth of field with breathtaking G Master bokeh

The extremely high surface precision of XA elements, careful control of spherical aberration at both the design and the manufacturing stages, and an 11-blade circular aperture all come together to produce spectacularly smooth, elegant G Master bokeh that maximizes the creative potential of the narrow depth of field available with this 135mm F1.8 lens.

Dual front and rear XD linear motors achieve fast, precise, quiet AF

Sony's innovative XD (extreme dynamic) linear motors also play an important role, making it possible to maintain focus on moving portrait subjects, performers on stage, or similarly dynamic subjects with impressive speed, precision, and reliability, while also providing AF control that is quiet and virtually free of vibration.

Floating focus mechanism for improved close-up capability

Although it is a 135-mm telephoto lens, a floating focus system that effectively controls aberration at all focusing distances has made it possible to achieve a minimum focus distance of just 2.3 ft (0.7 m) and a maximum magnification of 0.25x for close-up photography. Small accessories and other subjects can be captured with remarkable resolution and soft, beautiful background bokeh.

Superior imaging plus mobility, operability, and reliability

The important features include customizable focus hold buttons, a focus range limiter, an aperture ring with switchable click stops, a dust/moisture resistant design2, and a fluorine coated front element. Overall, this is a lens that meets professional requirements for control and reliability for both stills and movies.