Zeiss 21mm f/2.8 Milvus 2.8/21

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Lens Specifications
Name Zeiss 21mm f/2.8 Milvus 2.8/21
Image Circle 35mm
Type Wide Prime
Focal Length 21mm
APS Equivalent 1.5x: 31.5mm; 1.6x: 33.6mm
Max Aperture f/2.8
Min Aperture f/22
Diaphragm Blades 9 (rounded); Nikon version has manual aperture ring which can be de-clicked
Lens Construction 16 elements in 13 groups, including 4 Anomalous Partial Dispersion elements; Enhanced Zeiss T* anti-reflective coating
Diagonal Angle of View(Based on image circle) 90 degrees
Focus Details Manual focus only
Front Element Rotation No
Zoom System n/a
Closest Focus 0.22m / 0.72 ft.
Magnification Ratio 0.2x / 1:5
Filter Size 82mm
Dimensions(Length x Diameter) 92.5mm x 95.3mm / 3.64 in. x 3.75 in. (Nikon version)
Weight 735g / 25.9 oz (Nikon version)
Notes Available lens mounts: Canon EF (ZE), Nikon F (ZF.2); Weather-sealed construction to protect against dust and moisture; Hood and lens caps included.
Typical Online Price US$1,850 (Avail. October 2015)