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Panasonic Leica DG 25-50mm F1.7 specifications leaked

LEICA DG 25-50mm F1.7
(Image credit: Panasonic)

Development of the LEICA DG 25-50mm F1.7 Micro Four Thirds lens was announced at the same time as the Lumix GH5 II and GH6 back in May 2021, but Panasonic gave no indication of its specifications beyond its headline features: a focal range of 25-50mm (50-100mm equivalent) and an unprecedented constant F1.7 maximum aperture.

It's a lens likely to appeal to both stills photographers and videographers who need the ultimate in bokeh and low light shooting capabilities, and don't might the weight and likely expense of such a fast lens. Its 50-100mm equivalent focal length makes it a short telephoto zoom with an extremely wide maximum aperture. The only comparison we can think of are the Sigma 18-35mm f/1.8 and 50-100mm f/1.8 APS-C DSLR lenses.

Leaked Leica DG 25-50mm F1.7 specifications

Panasonic may be saying nothing about the new lens's specifications, but these details have been leaked by respected rumor source Nokishita:

• Optical configuration: 16 elements in 11 groups (1 aspherical lens, 3 ED lenses, 1 UHR lens)
• Minimum focus distance: 0.28m ( at25mm)/0.31m (at 50mm)
• Maximum magnification: 0.21x (35mm format equivalent 0.42x)
• Filter size: 77mm
• Dimensions: 87.6 x 127.6mm
• Weight: 654g

These specifications don’t expand greatly on what Panasonic has already revealed about this lens, except to confirm that it will be a substantial optic definitely designed for light-gathering power rather than compactness.

It’s not the first F1.7 constant aperture zoom from Panasonic. The new lens will join the existing LEICA DG VARIO-SUMMILUX 10-25mm F1.7 ASPH launched in 2019. As Panasonic points out, photographers and videographers will soon be able to span a focal range of 20-100mm (full frame equivalent) at a constant F1.7 aperture with just two lenses.

Panasonic has made it clear all along that it will continue to support the Micro Four Thirds format, even though it has put so much development into its full frame Lumix S system. The company sees the Lumix G and Lumix S systems as distinctly different, each with its own strengths and with its own user base.

Read more:

Best Micro Four Thirds lenses
Panasonic Lumix GH6 announced
Best Panasonic cameras
Best 4K cameras for video

Rod Lawton

Rod is the Group Reviews editor for Digital Camera World and across Future's entire photography portfolio. Previously he has been technique editor on N-Photo, Head of Testing for the photography division and Camera Channel editor on TechRadar. He has been writing about photography technique, photo editing and digital cameras since they first appeared, and before that began his career writing about film photography. He has used and reviewed practically every interchangeable lens camera launched in the past 20 years, from entry-level DSLRs to medium format cameras, together with lenses, tripods, gimbals, light meters, camera bags and more.