Panasonic has announced that its Leica DG Vario-Summilux 10-25mm F1.7 ASPH lens - first teased at Photokina 2018 - will be available for purchase in July. Panasonic is marketing the 10-25mm, which in full-frame terms is equivalent to 20-50mm on a Micro Four Thirds body, as a single lens that covers five commonly used equivalent focal lengths: 20, 24, 28, 35 and 50mm.

The lens features a total of 17 elements, including aspherical, ED and UHR glass. The lens uses a stepping motor to provide fast, quiet focus. It has a nine-blade aperture and minimum focus distance of 28cm (11"). The lens isn't as large or as heavy as one would expect, and is very well-built and fully weather-sealed. It's the first Panasonic Micro Four Thirds lens with a focus clutch and a clickless aperture ring is also provided.

The 10-25mm was very much designed with video in mind, with minimal focus breathing, 'seamless' iris control for smooth exposure changes and linear focus response.

The Panasonic Leica DG 10-25mm F1.7 ASPH will be available in July for $1799/£1799.

Panasonic Introduces The World’s First* Standard Zoom Lens Achieving Full-range F1.7

LEICA DG VARIO-SUMMILUX 10-25mm / F1.7 ASPH. (H-X1025)

*As a digital interchangeable lens for a mirrorless camera, as of May 31, 2019

Newark, NJ (May 31, 2019) - Panasonic is proud to introduce a new standard zoom digital interchangeable lens, the LEICA DG VARIO-SUMMILUX 10-25mm / F1.7 ASPH.

(H-X1025), which boasts a large F1.7 aperture throughout the entire 20-50mm (35mm camera equivalent) zoom range and exceptionally high optical performance, clearing the stringent LEICA standards. The LEICA DG VARIO-SUMMILUX 10-25mm / F1.7 ASPH. is suitable not only for stills shooting, but also for video recording, to satisfy both professional photographers and videographers.

The full-range F1.7 ASPH. high-speed aperture provides beautiful bokeh and high descriptiveness. Covering a focusing distance from wide angle to standard zoom range, the LEICA DG VARIO-SUMMILUX 10-25mm / F1.7 ASPH. functions as a multiple fixed focal-length lens, providing the same or higher level of descriptiveness than a fixed focal-length lens can offer. It is suitable for a variety of daily shooting situations, from dynamic landscapes to portraits--even in low-lit scenes-- eliminating the need to change lenses between variations in environment.

Comprising 17 elements in 12 groups, the lens system features three aspherical lenses and four ED (Extra-low Dispersion) lenses that effectively suppress the axial chromatic aberration and chromatic aberration of magnification. Spherical aberration and distortion are also corrected by the aspherical lenses for stunningly high resolution. The use of aspherical lenses coupled with the optimum design of the lens system, results in a compact size and light weight, while maintaining its outstanding optical performance.

Compatibility with a maximum 240-fps high-speed sensor drive realizes high-speed and high-precision auto focusing. Notably, the new lens excels in video recording performance. In addition to the silent operation achieved by the inner focus drive system, the stepless aperture ring and micro-step drive system in the aperture control section help the camera smoothly catch up to brightness changes when zooming or panning. The optical design achieves exceptional barycentric stability to minimize image shifts during zooming. Adoption of a focus clutch mechanism enables instant AF/MF switching and accurate manual focusing. The LEICA DG VARIO-SUMMILUX 10-25mm / F1.7 ASPH. also excels in video recording performance with a mechanism that suppresses focus breathing, which was previously a fatal problem of all interchangeable lenses designed for still image photography.

The rugged dust/splash-resistant* design withstands use under harsh conditions even at -10 degrees Centigrade for high mobility. Nine blades give the aperture a rounded shape that produces an attractively smooth defocus effect in out-of-focus areas when shooting at larger aperture settings. Filter diameter is in 77mm. A highly reliable metal mount endures long time use.

Panasonic is committed to expanding the of Micro Four Thirds lineup through its LUMIX G series of cameras and lenses.

*Dust and Splash Resistant does not guarantee that damage will not occur if this lens is subjected to direct contact with dust and water.

  • Design and specifications are subject to change without notice.

Leica DG Vario-Summilux 10-25mm F1.7 ASPH lens specifications

Principal specifications
Lens typeZoom lens
Max Format sizeFourThirds
Focal length10–25 mm
Image stabilizationNo
Lens mountMicro Four Thirds
Aperture
Maximum apertureF1.7
Minimum apertureF16
Aperture ringYes
Number of diaphragm blades9
Optics
Elements17
Groups12
Special elements / coatings1 UHR, 3 aspherical, 4 ED elements
Focus
Minimum focus0.28 m (11.02)
Maximum magnification0.14×
AutofocusYes
Motor typeStepper motor
Full time manualYes
Focus methodInternal
Distance scaleYes
DoF scaleNo
Physical
Weight690 g (1.52 lb)
Diameter88 mm (3.46)
Length128 mm (5.04)
MaterialsMagnesium alloy
SealingYes
ColourBlack
Zoom methodRotary (extending)
Power zoomNo
Zoom lockNo
Filter thread77 mm
Hood suppliedYes
Tripod collarNo