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Zeiss Distagon T* 2,8/21

Zeiss Distagon T* 2,8/21
Zeiss Distagon T* 2,8/21
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  • Carl Zeiss T* anti-reflective coating
  • Floating Elements Design
  • 9 Blades (Rounded diaphragm)
  • Metal mount
Zeiss Distagon T* 2,8/21
Zeiss Distagon T* 2,8/21 front lens element view
Zeiss Distagon T* 2,8/21
Zeiss Distagon T* 2,8/21 lens construction
MTF Charts: 
Zeiss Distagon T* 2,8/21 mtf chart at f2.8
Zeiss Distagon T* 2,8/21 mtf chart at f/5.6

Overview

Description by Zeiss:

The Distagon T* 2,8/21 is a super wide-angle lens and is the leader in its range. Thanks to its aperture of 2.8 and its non-reflecting and virtually distortion-free characteristics, it will help you create spectacular compositions full of variety, dramatic contrast and deep, vivid colors.

Virtually distortion-free optics
Dramatic perspectives and a view from extraordinary image angles – SLR lenses from Carl Zeiss open up new composition possibilities. Distortion would disrupt the composition because straight lines, whose image does not go through the image center, would be reproduced with a curved shape.  This annoying effect is accordingly and largely compensated through elaborate optical designs at all focal lengths.

Elaborate stray light reduction


Rich, vibrant colors are vital to creating a lasting impression. Stray light in the lens, however, would lead to a brightening of the image, which is particularly visible in shadow areas. Image contrast is lowered; the image appears dull and bleached. We combine various, elaborate techniques to reduce unwanted stray light. For example, all lens elements are coated with the famous Carl Zeiss T* anti-reflective coating. Additionally, a jet black special paint is applied by hand to all lens element edges to ensure that reflections are prevented from the start.

Floating Elements Design

zeiss_floating_elements_design
State-of-the-art camera techniques and high-resolution digital image sensors increasingly demand more from the lenses. The modern floating element design compensates aberrations of the Carl Zeiss SLR lenses at different distance settings. This is accomplished by changing the axial distance of single lens elements or element groups to each other. The adjustment of the element distance is coupled to the distance setting so that it always results in the right correction. The mechanical design of these lens elements is very complex and the workmanship must be particularly exact – both specialties of Carl Zeiss.

Excellent image quality
The Carl Zeiss range of T* lenses offers the highest possible standards in terms of performance, reliability and, of course, image quality. Quite simply, they are superior in every way. You can count on highly advanced flare control for crisp and brilliant images, for example. And virtually zero geometric distortion, ensuring precise accuracy when reproducing shapes – especially useful when photographing products and architecture.

Precise manual focus


 

zeiss_manual_focus
Manually focusing a lens means controlling the image result from your fingertips. A good ergonomic design makes all the difference. Carl Zeiss SLR lenses stand out with their large rotation angle which enables precise focusing. Changes are immediately visible in the viewfinder. The high-quality focusing mechanism moves smoothly without play, thus also supporting the intuitive interaction with the focal plane. The precise engraving in meter and feet, and the depth of focus scale provide additional support for manually focusing.

 

 

Carl Zeiss Lenses for SLR Cameras - Camera Mounts

The manually focusable Carl Zeiss SLR lenses are available with EF bayonet (ZE), F bayonet (ZF.2). The possibilities of using scene programs, different types of exposure metering and individualized functions can be varied depending on the camera model.

 

zeiss-lenses-_zf2 ZF.2 Lenses
Lenses with F mount equipped with AI-apperture coupling and CPU
zeiss-lenses ze mount ZE Lenses
Lenses equipped with an EF bayonet for EOS cameras from Canon

 

Reviews

"Lacking autofocus and image stabilization, the Zeiss 21mm f/2.8 Distagon T* ZE Lens has exactly zero buttons and switches. The entire smooth/straight part of the lens barrel is focus ring except for a just-barely-adequately-sized area to grip the lens for mounting/unmounting. The lens does not extend during focusing. The filter threads do not rotate. Only the focus ring moves - and it very smoothly, very precisely rotates in a 81° arc. Infinity focus is a hard stop (no focusing past infinity).

Post date: 16/09/2010 - 00:00

Specifications

DXO Mark Score
Resolution: 
13.0 P-Mpix
Transmission: 
3.3 TStop
Distortion: 
0.60%
Vignetting: 
-1.9 EV
Chr. aberration: 
5.00µm
Specifications
Lens type: 
Fixed Focal Length
Lens Mount: 
Nikon F mount
Canon EF mount
Canon EFS mount
AF Motor type: 
Manual Focus Only
Optical characteristics
Focal Length: 
21mm
Lens construction: 
16 lens elements in 13 groups
Diaphragm Blades: 
9 aperture blades circular opening
Maximum Aperture: 
f/2.8
Minimum Aperture: 
f/22
Minimum Focusing Distance: 
0.22m
Physical characteristics
Diameter: 
87.0mm
Length: 
110.0mm
Weight: 
600g - 720g
Body material: 
Metal
Filter Diameter: 
M 82 x 0.75

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