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Leica

Leica Summarit-S 70mm F/2.5 CS Aspherical CS Lens for the S2 System

SKU: LC7025CS MFR: 11051
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About this item

The highest priority during development of the Leica S lenses was image quality. Their sophisticated design features special grades of glass and aspherical surfaces rarely found in optics of this size.

In addition, lenses manufactured to extremely narrow tolerances, with each lens centered by hand, guarantees superior quality and optical performance. The maximum performance of each lens is available even at full aperture setting, or when shooting from a distance or capturing close-up images. Vignetting, distortion and chromatic aberrations have been reduced to the point of imperceptibility, eliminating the need for quality-degrading image corrections and simplifying digital post-processing considerably.

The newly developed S-bayonet mount ensures rapid and precise digital exchange of data and commands between the camera and lens.

Precise, high-speed autofocus
The autofocus developed by Leica for the S2 is based on a centrally positioned cross-hair sensor for high precision focusing. Each S lens has its own Leica-designed microprocessor for precise autofocus and iris diaphragm control. The integrated focusing drive is a proprietary Leica design that features silent gearing. All S lenses have a generous focus ring with just the right amount of drag, letting the photographer override the autofocus at any time.

Rugged, durable design The camera's body is made of robust die-cast magnesium with a leather-grain finish for maximum grip. The S2 and all S lenses are extensively weatherproofed and can withstand exposure to rain and dust, and the USB and remote control ports feature rugged bayonet locks with strain relief. The S2 can also be supplied with a highly scratch-resistant LEICA S2-P sapphire glass display cover for the most extreme and demanding conditions.

Dual shutter system
The LEICA S2 allows photographers to choose the shutter system which best matches the task at hand. The S2 is equipped with a metal focal-plane shutter with the fastest shutter speed of 1/4000 of a second and a flash synch time of 1/125 of a second. Lenses of key focal lengths will be available in the future with integrated leaf shutters designed by Leica engineers that photographers can activate via the camera's main switch. The integrated leaf shutter allows flash units to be used at the fastest shutter speed of 1/500 second, giving photographers more options for suppressing unwanted ambient light. Several patents are pending for the Leica leaf shutter, which features an electronically-controlled drive guaranteeing reliable, fast exposure times and low energy consumption.

Key Features

  • CS Lenses have an integrated focal-plane shutter
    The integrated leaf shutter allows flash units to be used at the fastest shutter speed of 1/500 second, giving photographers more options for for suppressing unwanted ambient light.
  • Sophisticated design features special grades of glass and aspherical surfaces
  • Manufactured to extremely narrow tolerances, with each lens centered by hand, guarantees superior quality and optical performance
  • Newly developed S-bayonet mount ensures rapid and precise digital exchange of data and commands between the camera and lens.

Technical Specs

Construction 8 elements in 6 groups + 1 protective filter (1 aspherical surface)
Angle of view approx. 42°, 35, 5°, 24°, approx. corresponds to 56 mm in 35 mm-format
F stop range 2.5 to 22
Closest Focusing Distance 19.68 in
Maximum Magnification 1:4.7
Filter Size 82mm
Dimensions (Length x Diameter) 3.54" x 3.66"
Weight 31.39 oz
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