Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens


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The Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens combines function with industry-conscious design features resulting in a highly versatile lens, fit for both video and photographic use. With a 35mm full-frame equivalent focal range of 50-100mm, this short telephoto lens is characterised by its wide, bright and fast constant f1.7 maximum aperture. This 9-bladed aperture helps this lens excel in low-light conditions throughout its zoom range as well as offering enhanced control over depth-of-field.

Built to Leica Camera AG’s strict quality standards, the Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens features an advanced optical structure made up of 16 glass elements arranged into 11 groups, including 1 Aspherical, 1 UHR and 3 ED lens elements that contribute to the impeccable image quality. In addition, this optical structure is an impressively fast AF system, focusing clutch design and a stepless, de-clicked aperture ring that’s ideal for video use.

Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens Key Features:

  • Specially designed for use on Micro Four Thirds Systems
  • It offers a 35mm equivalent to a short telephoto 50-100mm
  • A super-bright, wide and fast constant f1.7 maximum aperture
  • A complex lens structure made up of 16 elements in 11 groups
  • Quality is ensured with 1 Aspherical, 1 UHR & 3 ED lens elements
  • Accurate colour reproduction withstands both fringing & aberrations
  • Linear AF motor & internal focusing system for fast & quiet AF
  • Focus Clutch mechanism ensures intuitive switching between AF & MF modes
  • A stepless, De-Clicked aperture ring makes for smooth transitions
  • The lens has a rounded 9-bladed diaphragm for smooth defocus
  • Forms an enhanced two-lens zoom system with the Leica DG Vario-Summilux 10-25mm
  • A Splash, Dust, & Freezeproof design for peace of mind
The Optical Structure

To provide such a high-quality image, Panasonic has used a highly advanced and complex optical structure that’s built to Leica Camera AG’s strict quality standards. It comprises 16 premium glass elements arranged into 11 groups, including the use of 1 aspherical lens, 3 extra-low dispersion lenses, and 1 UHR element.

These additional elements have been implemented to suppress the appearance of colour fringing, chromatic aberrations, and spherical aberrations, resulting in high levels of clarity, sharpness, and colour accuracy. This is complemented by a super-bright, fast and constant f1.7 maximum aperture that not only excels in low-light conditions but is capable of producing smooth and pleasing bokeh.

Professional Performance

When it comes to performance, this lens has been designed to excel with both stills and video capture. The lens is fitted with a Linear AF motor and an internal focusing system that together can deliver impressive fast and quiet focusing performance. As well as this, this design results in next to no focusing breathing throughout the entire focusing range and the optical mechanics offer exceptional barycentric stability minimising image shifts during zooming.

This, and the addition of a stepless, de-clicked aperture ring that offers smooth and silent aperture adjustments, makes the Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens ideal for video purposes. Furthermore, Panasonic has included a focus clutch mechanism that allows for easy switching between AF and MF modes.

That looks familiar?

Mirroring the aesthetics of the ever-popular Leica DG Vario-Summilux 10-25mm f/1.7 ASPH. lens, the Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens incorporates near-identical exterior dimensions and weight. Further to this, they also share the same 77mm filter ring diameter and utilise unified colour rendering to guarantee flawless switching between both lens types. In essence, this 25-50mm lens stands as the second half of an enhanced two-lens zoom system.

By doing so, you can easily and efficiently switch between this lens and the wider 10-25mm without having to change internal camera settings or even adapt your shooting stance. Both lenses employ unified colour balance, consistent image quality, matching bokeh rendition, and resolution to support 4K video. For filmmakers, their identical centres of gravity and overall form factors also make swapping lenses out of a video rig incredibly fast and hassle-free.

What’s in the box?

  • 1 x Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens
  • 1 x Front Lens Cap
  • 1 x Rear Lens Cap
  • 1 x Lens Hood
  • 1 x Lens Bag
  • Limited 1-Year Warranty

Specifications of the Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens

Angle Of View 47°(Wide) – 24°(Tele)
Aperture Blades 9
Filter Thread [mm] 77
Focal Length ~ Tele [mm] 50.0
Focal Length ~ Wide [mm] 25.0
Included Accessories Lens cap, Lens rear cap, Lens hood, Lens storage bag
Lens Elements 16
Lens Groups 11
Lens Mount Micro Four Thirds
Lens Type Short Telephoto Zoom
Max Aperture ~ Tele 1.7
Max Aperture ~ Wide 1.7
Minimum Aperture 16
Minimum Focus Distance [m] 0.28
Sensor Format Micro Four Thirds
Size 87.6mm (D) x 127.6mm (L)
Weight [g] 654.00

For a more detailed specification about the Panasonic 25-50mm f1.7 LEICA DG VARIO-SUMMILUX ASPH Lens see here. For more Panasonic lenses see here.

Additional information

Weight 654 g
Dimensions 87.6 × 127.6 mm

Lens Type

Lens Mount

Filter Thread Size (mm)


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