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Sigma 8mm f/3.5 EX Fisheye

Sigma 8mm f/3.5 EX Fisheye Specifications
Frame Coverage 35mm (circular fisheye)
Lens Construction (groups) 6
Lens Construction (elements) 11
No. of Diaphragm Blades 6
Minimum Aperture 22
Closest Focusing Distance 0.14m (5.3")
Maximum Magnifcation 0.22x
Filter Diameter N/A (rear gelatin filter)
Maximum Diameter x Length 73.5mm x 68.6mm (2.9" x 2.7")
Weight 400g (14oz)
For those needing this type of lens, for example when using software to create panoramics or for those involved in the scientific measurement of angles, where the output from this lens is quantifiable, this lens is an excellent tool.
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