Being a member of Sigma’s EX family, this lens is well built and finished and is supplied in it’s own zip-topped semi-hard pouch. The only controls on the lens are the manual focus ring with a distance scale marked in metres and feet and the standard AF/MF switch. There is a depth-of-field scale marked on the lens that has an exceptionally large range due to the focal length of the lens.

There is no filter thread, or, for that matter, a hood bayonet as the coverage of the lens, being a full 180°, stops any accoutrements forward of the front element being permissible. The lens cap/hood is a two part affair consisting of a stopped sleeve and a fairly normal lens cap that fits onto it. The sleeve sports a 72mm filter thread and cap. And 72mm filters can be used in this thread, albeit at the expensed of further vignetting. Under manual focussing, the ring requires a quarter turn to go through the full range and the ring does turn during autofocus, which is fairly quiet during operation and quick enough for any purpose this lens could be put to.

Technical details:

• Focal length 8mm
• Max aperture f/3.5
• Min aperture f/22
• Angle of view 180°
• Construction 11/6 elements/groups
• Filter size Rear Gelatine
• Dimensions 73.5×68.6mm
• Weight 0.4kg

Look for Sigma 8mm f/3.5 EX DG Circular Fisheye Lens  at our ONLINE CAMERA STORE

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This entry was posted on Friday, September 15th, 2006 at 12:17 pm and is filed under Lenses. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.