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Panasonic H-X1025 Lumix 10-25mm f/1.7 Leica Lens — main product image
Panasonic H-X1025 Lumix 10-25mm f/1.7 Leica Lens
Panasonic H-X1025 Lumix 10-25mm f/1.7 Leica Lens
Panasonic H-X1025 Lumix 10-25mm f/1.7 Leica Lens
Panasonic H-X1025 Lumix 10-25mm f/1.7 Leica Lens
Panasonic H-X1025 Lumix 10-25mm f/1.7 Leica Lens
Panasonic H-X1025 Lumix 10-25mm f/1.7 Leica Lens
Panasonic

Panasonic H-X1025 Lumix 10-25mm f/1.7 Leica Lens

★★★★★4.5 (56 reviews)
f/1.7

The ultra-fast f/1.7 constant-aperture zoom that covers 20-50mm equivalent for Micro Four Thirds shooters.

$1,897.99*$1,999.99Save 5%
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Panasonic Lumix G Leica DG Vario-Summilux 10-25mm f/1.7 ASPH is a lens that defies convention. Where virtually every zoom lens loses light as you extend the focal length, the H-X1025 holds a constant f/1.7 aperture from 10mm all the way to 25mm — delivering prime-lens-caliber brightness across a versatile wide-to-normal zoom range. Certified to Leica AG's quality standards, the optics produce images with outstanding sharpness, rich contrast, and beautifully rendered bokeh that you would typically only expect from dedicated prime lenses.

What truly sets this lens apart is its hybrid photo-video design. The stepless, de-clicked aperture ring uses a micro-step drive to produce perfectly smooth exposure transitions on camera, while the optical formula minimizes focus breathing and image shift during zooming — issues that plague most photography-first lenses repurposed for video. The clutch focus mechanism adds another layer of professional control, letting you snap between autofocus and direct manual focus instantly. For filmmakers, documentarians, and hybrid shooters working in the Micro Four Thirds ecosystem, the 10-25mm f/1.7 effectively replaces a bag full of fast primes with a single, remarkably capable zoom.

Key Features

Leica DG vario-summilux – Leica camera ag’s strict quality standards optimized for photo/video has been developed into this ruggedized Mirrorless micro Four Thirds mount lens.

F1. 7 full range – F. 17 high-speed aperture brightness is available across the entire zoom range of 10-25mm

Stepless aperture – a stepless “De-Clicked” aperture ring and micro-step Drive aperture system provide smooth transitions when scene brightness changes rapidly.

Reduced brightness shifts - The optical design achieves exceptional barycentric stability to minimize image shifts during zooming.

Clutch focus –a focus Clutch Mechanism enables instant AF/MF switching and accurate manual focusing Plus an inner focus Drive system provides near silent operation.

Specifications

Focal Length
10-25mm (20-50mm equivalent)
Maximum Aperture
f/1.7 (constant)
Lens Mount
Micro Four Thirds
Aperture Ring
Stepless / De-clicked
Focus Type
AF/MF with Clutch Focus mechanism
Optical Standard
Leica DG Vario-Summilux
Dimensions
4 x 6 x 6 inches
Weight
1.2 pounds
Model Number
H-X1025

Pros & Cons

👍 Pros

  • Constant f/1.7 aperture across the entire zoom range delivers exceptional low-light performance and shallow depth of field
  • De-clicked aperture ring and minimal breathing make it exceptionally well-suited for cinema and video production
  • Clutch focus mechanism allows instant, tactile switching between autofocus and manual focus
  • Leica-certified optics deliver outstanding sharpness and contrast across the frame
  • Covers a versatile 20-50mm equivalent range, replacing multiple prime lenses in a single package

👎 Cons

  • Premium price point places it among the most expensive Micro Four Thirds lenses available
  • At 1.2 pounds, it is notably heavy and large for a Micro Four Thirds lens, reducing the system's size advantage
  • Lacks built-in optical image stabilization, relying entirely on in-body stabilization
  • The 10-25mm range on Micro Four Thirds does not reach true wide-angle territory below 20mm equivalent

Frequently Asked Questions

This lens is designed exclusively for Micro Four Thirds mirrorless cameras, including Panasonic Lumix and Olympus/OM System bodies. It provides a 35mm equivalent focal range of 20-50mm.
No. The H-X1025 maintains a constant f/1.7 maximum aperture across the entire 10-25mm zoom range, which is extremely rare for a zoom lens and eliminates exposure shifts while zooming.
Yes. It features a de-clicked aperture ring with a micro-step drive for smooth, stepless aperture transitions, and its optical design minimizes image shift (breathing) while zooming — both critical features for professional video.
The focus clutch lets you instantly switch between autofocus and manual focus by sliding the focus ring forward or back. In manual mode, it provides direct, mechanical-feel focusing with hard stops for precise control.

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