LEICA DG VARIO-SUMMILUX 10-25mm / F1.7 ASPH. H-X1025 is built for mirrorless Micro Four Thirds mount cameras and enables F1.7 aperture brightness throughout the entire 20-50mm (35mm camera equivalent) zoom range with exceptionally high optical performance clearing the stringent LEICA standards. Suitable not only for photo shooting but also for video recording to satisfy both professional photographers and videographers.
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 and the optimum design of the lens system results in a compact size and light weight despite its outstanding optical performance.
Compatibility with a maximum 240-fps high-speed sensor drive realizes high-speed, high-precision autofocusing. Notably, the new lens excels in video recording performance. In addition to the silent operation achieved by the inner focus drive system, the stepless “de-cliked” aperture ring and micro-step drive system in the aperture control section help the camera to 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 lens also excels in video recording performance with a mechanism that suppresses focus breathing, which was a fatal problem of all interchangeable lenses designed for still image photography.
- LEICA DG VARIO-SUMMILUX – LEICA Camera AG’s strict quality standards optimized for video/filmmaking have been developed into this 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 aperture ring and micro-step drive aperture system helps to smoothly catch up to brightness changes when zooming or panning.
- 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
Lens Construction 17 elements in 12 groups (3 aspherical lenses, 4 ED lenses, 1 UHR lens)
Nano Surface Coating -
Mount Micro Four Thirds mount
Optical Image Stabilizer -
Focal Length f10-25mm (35mm camera equivalent 20-50mm)
Aperture Type 9 diaphragm blades / Circular aperture diaphragm
Maximum Aperture F1.7
Minimum Aperture F16
Closest Focusing Distance 0.28m / 0.92ft
Maximum Magnification Approx. 0.14x / 0.28x (35mm camera equivalent)
Diagonal Angle of View 94o (Wide) - 47o (Tele)
Dust and Splash Resistant Yes
Recommended Operating Temperature -10oC to 40oC (14oF to 104oF)
Filter Size f77mm
Max. Diameter f87.6mm / 3.45inch
Overall Length Approx. 128mm / 5.04inch (from the tip of the lens to the base side of the lens mount)
Weight Approx. 690g / 24.34oz (excluding lens cap, lens rear cap and lens hood)
Standard Accessories Lens cap, Lens rear cap, Lens hood, Lens storage bag
NOTE Dust and Splash Resistant does not guarantee that damage will not occur if this lens is subjected to direct contact with dust and water.