|BIOGON||Optical design invented by Ludwig Bertele. Nowadays remains the blueprint in the history of optics. The lens with such wide angle of view that could capture maximum of life in one frame. The Biogon is a very compact and almost symmetrical lens design that has no distortions, exhibits beautiful color rendition and even resolution all over the frame. Can't be used with SLR cameras due to its short working distance.|
|T*||The multi-layer coating is applied to the surface of lens elements. It boosts light transmission, ensures sharp and high contrast images, minimizes ghosting and flares.|
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|Maximum format:||35mm full frame|
|Diagonal angle of view:||91.7° (35mm full frame)|
|Lens construction:||9 elements in 7 groups|
|Closest focusing distance:||50 cm|
|Number of diaphragm blades:||7|
|Type of autofocus motor:||No motor (Contax G)
|Full-Time Manual Focus:||No information|
|Maximum diameter x Length:||Ø59 x 35 mm|
|Materials:||Metallic barrel, metallic mount|
|Filter size:||55 mm|
Design and Features
This Biogon 2.8/21 lens bridges the gap between the Hologon T* 8/16 lens and the Biogon 2.8/28 lens for the Contax G lens range.
With its large field angle across the diagonal, this lens is suitable for photography where not only a dynamic perspective, but also high image quality and minimum distortion are required at the same time. Examples include the photography of architecture and interiors. The relatively wide initial aperture of f/2.8 also allows available-light photography of interiors.
The almost symmetrical design of this lens also makes it suitable for the close-up range: its superb image quality, especially at infinity, is also evident in photographs of prototype and architectural models.
The Biogon 2.8/21 lens has been designed for use with the autofocus connection of the Contax G compact cameras.
|User Manual. English, Adobe PDF, 65 KB|