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The Panasonic Leica DG Vario-Summilux 25-50mm f/1.7 ASPH (H-X2550) is a telephoto zoom digital interchangeable lens, designed for photographers, videographers and G Series enthusiasts. Its versatile focal range, along with a constant F1.7 aperture, adds a cinematic depth-of-field to your work, elevating it to the next level. The Panasonic 25-50mm f/1.7 lens is perfect for both photographic and cinematic applications, such as interviews and documentaries.

Panasonic Leica DG Vario-Summilux 25-50mm f/1.7 ASPH

Amazing versatility in a videographer’s kit
This new Panasonic Leica DG Vario-Summilux 25-50mm / F1.7 ASPH is created to complement the current Leica DG Vario-Summilux 10-25mm F1.7 ASPH Lens. These two lenses cover a focal distance from wide-angle to telephoto and are the equivalent of eight prime lenses when used together. It boasts a large F1.7 aperture throughout the entire 50-100mm zoom range with exceptionally high optical performance clearing the stringent LEICA standards. With gorgeous bokeh and a common aperture, great descriptive performance, shape, and operability, it provides incredible adaptability in a videographer's gear.

Panasonic Leica DG Vario-Summilux 25-50mm f/1.7 ASPH

Remarkable optical design
The lens system employs 16 elements in 11 groups, with an aspherical lens and three ED (Extra-low Dispersion) lenses that suppress axial and magnification chromatic aberration as well as spherical aberration and distortion. The utilisation of aspherical lenses, as well as the lens system's optimal design, results in a lens with astoundingly high resolution in a tiny, lightweight package.

Panasonic Leica DG Vario-Summilux 25-50mm f/1.7 ASPH

Precise and fast autofocusing
The Leica 25-50mm f1.7 lens is compatible with the LUMIX G sensor drive at 240fps enabling the user to take advantage of the high-precision, high-speed autofocusing. The inner focus drive mechanism allows for completely silent operation. The camera can smoothly catch up to brightness fluctuations while zooming or panning thanks to a step-less aperture ring and a micro-step drive mechanism in the aperture control system.

Panasonic Leica DG Vario-Summilux 25-50mm f/1.7 ASPH

Outstanding barycentric stability
The optical design delivers remarkable barycentric stability to reduce picture shifts when zooming, and a focus ring with linear/non-linear settings allows for intuitive, precise focusing. With a system that prevents focus breathing across the zoom range, the 25-50mm f1.7 shines in video recording.

Panasonic Leica DG Vario-Summilux 25-50mm f/1.7 ASPH

Robust design with macro capability
For better macro photography, the Panasonic 25-50mm f1.7 lens has a minimum focusing distance of 0.28m (at the wide end, 0.31m at the end) and a maximum magnification ratio of 0.42x (35mm camera equivalent). The lens is dust and splash resistant, and it can withstand temperatures as low as -10° Celsius.

Panasonic Leica DG Vario-Summilux 25-50mm f/1.7 ASPH
  • Designed For Modern Creators
  • Ideal For Cinematic Video
  • 16 elements in 11 groups
  • 1 Aspherical lens, 3 ED Lenses, 1 UHR Lens
  • 9 Diaphragm Blades
  • Constant F1.7 Aperture
  • Superb Close-up Performance
  • Dust, Splash & Freeze-Resistant Design
  • F77mm Filter Size

Lens Name


Lens Construction

16 elements in 11 groups (1 aspherical lens, 3 ED lenses, 1 UHR lens)


Micro Four Thirds mount

Focal Length

f=25-50mm (35mm camera equivalent 50-100mm)

Aperture Type

9 diaphragm blades / Circular aperture diaphragm

Maximum Aperture


Minimum Aperture


Closest Focusing Distance

0.28m/0.92ft (at focal length 25mm) / 0.31m/1.02ft (at focal length 50mm)

Maximum Magnification

0.21x / 0.42x (35mm camera equivalent) (at focal length 50mm)

Diagonal Angle of View

47°(Wide) - 24°(Tele)

Dust and Splash Resistant


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

Recommended Operating Temperature

-10? to 40?

Filter Size


Max. Diameter


Overall Length

Approx. 127.6mm (from the tip of the lens to the base side of the lens mount)


Approx. 654g (excluding lens cap, lens rear cap and lens hood)

* Specifications subject to change by the manufacturer without notice

  • Panasonic LEICA DG VARIO-SUMMILUX 25-50mm / F1.7 Asph
  • Lens Cap
  • Lens Rear Cap
  • Lens Hood
  • Lens Storage Bag

Manufacturer Warranty

This product comes with a

12month Australian warranty

from Panasonic Australia

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* Dispatch timeframes are indications only and may vary for multiple quantities. Timeframes are updated regularly during normal business hours.