Compact, expressive 10–20 mm F4 power zoom
At just 178 grams this is the world's smallest, lightest ultra-wide-angle 10–20 mm (35 mm full-frame equivalent: 15–30 mm) power zoom lens for APS-C cameras , offering class-leading mobility as well as outstanding handling and control. A constant F4 maximum aperture allows the use of practical shutter speeds even when shooting in low light.
Dynamic ultra-wide-angle images
A 10 mm focal length (35 mm full-frame equivalent: 15 mm) at the wide end of the zoom range provides extremely wide angles of view. This versatile lens can deliver impressive, dynamic images utilizing unique perspectives that effectively separate the subject from the background, and emphasize distance or speed in movies.
Excellent G Lens resolution
Three aspherical elements effectively suppress field curvature and astigmatism that can be problematic in wide-angle lenses, while an ED (extra-low dispersion) aspherical element contributes to outstanding image-wide resolution throughout the 10 to 20 mm zoom range (35 mm full-frame equivalent: 15 to 30 mm).
Fine optics with minimal aberration
This remarkably compact lens includes an ED (extra-low dispersion) aspherical element and two ED glass elements that subdue chromatic aberration throughout the image area, achieving natural colour and high contrast without colour bleeding.
Outstanding close-up performance
The use of aspherical elements in an advanced optical design also ensures excellent close-up performance throughout the lens's zoom range. Minimum auto focus distance is 0.2 metres with a maximum magnification of 0.14x, while minimum manual focus distance is 0.13 to 0.17 metres with a maximum magnification of 0.18x.
Responsive new power zoom system
A new electronic power zoom system instantly converts zoom ring control to actual zoom operation so that the creator's intent is faithfully captured. Precise changes in angle of view can be easily produced and reproduced as needed, providing extra capability for visual expression.
Lever-controlled power zoom expression
A zoom lever with continuously variable zoom speed makes it easy to execute super-slow constant-speed zooms and perform other operations that are difficult with manual zoom. Power zoom minimizes camera shake that can occur when operating a zoom ring so that even solo shooters can produce smooth, stable imagery.
Remote zoom control
In addition to the zoom controls built into the lens, zoom can be controlled from assignable buttons and controls on compatible camera bodies, accessory grips or remote commanders for convenient, versatile operation in a variety of situations.
Internal zoom and focus for great handling
Internal zoom and focus mechanisms ensure that the lens does not change in length when zooming or focusing. Shifts in the lens's centre of gravity are minimal, making it a great choice for stable vlogging and gimbal-mounted movie shooting.
Designed for sophisticated movie imagery
Advanced lens technology reduces focus breathing as well as focus and axial shift when zooming so that high quality images can be easily captured. This lens also supports the breathing compensation function provided in compatible α series bodies, further reducing unwanted angle-of-view shifts during focusing for smooth, high-quality movie footage.
Linear Response MF
Linear Response MF ensures that the focus ring responds directly and linearly to subtle control when focusing manually. Focus ring rotation translates directly to a corresponding change in focus, so control feels immediate and precise enough for rack focus effects when shooting movies.
Extraordinary AF for stills and movies
Two linear motors ensure fast, quiet, low-vibration auto focus that can smoothly track subjects when shooting high-frame-rate movies and reliably follow fast-moving subjects when shooting stills continuously at high speed. Focus is especially critical when shooting 4K or 8K movies, and this lens handles it with ease.
Superb control in a compact lens
Within a remarkably compact design, this lens features a focusing ring, zoom ring and zoom lever that maximize control and versatility for movies as well as stills. The adjacent focus and zoom rings are stepped so they can be easily differentiated and operated by feel while viewing the monitor.  Focusing ring  Zoom ring  Zoom lever
Customizable focus hold button
A customizable focus hold button is provided for easy access and convenient control in just about any shooting situation. Other functions can be assigned to the focus hold button from the body menus.
Focus mode switch for fast AF/MF switching
A focus mode switch right on the lens makes it possible to switch between auto focus and manual focus on the fly, to adapt to changing shooting conditions.
Dust- and moisture-resistant design
A dust- and moisture-resistant design provides extra reliability for outdoor use in challenging conditions
|Focal Length (mm)
|35 mm equivalent focal length (APS-C)
|Lens Groups / Elements
|Angle of View (APS-C)
|Maximum aperture (F)
|Minimum Aperture (F)
|Minimum Focus Distance
|0.66 ft (AF), Wide: 0.43 ft / Tele: 0.56 ft (MF) ((0.20 m (AF), Wide: 0.13 m / Tele: 0.17 m (MF))
|Maximum Magnification ratio (x)
|0.14 (AF), 0.18 (MF)
|Filter Diameter (mm)
|Image stabilization (SteadyShot)
|Teleconverter compatibility (x1.4)
|Teleconverter compatibility (x2.0)
|Petal shape, bayonet type
|Size & Weight
|Dimensions (D x L)
|2.75 in x 2.17 in (69.8 x 55.0 mm)
|6.3 oz (178 g)
|What's in the Box
|What's In The Box
|Hood (model): ALC-SH169; Lens front cap: ALC-F62S; Lens rear cap: ALC-R1EM; Case:-