This lens is great, a good addition to my photography toys box, at least for the purpose I bought for, panoramas for Real Estate properties. It has a big flaw though, the auto focus is really sloooooow

bought as part of the google business views program. nice little lens for panoramas and lovely and sharp. This panorama was taken using it: https://www.google.com/maps/views/view/110595744246840784567/gphoto/6062789120376232706

Fisheye is always tough to handle: the dynamic range of 180 degrees FOV is simply too wide; either the sun or your feet tend to get into the frame, one must take care finding a good spot -- and this lens is no exception.But for those who are familiar with the specifics of fisheye photography, will...

Consistent Output; Durable; Easily Interchangeable; Lightweight; Quick Focus; Rugged; Sharp Focus; Strong Construction

Chromatic aberration

An updated version of Sigma's 8mm f/4 spherical fisheye, this is the field's widest circular fisheye with autofocus. It's also among the last Sigma film-era lenses to be upgraded with coatings that suppress reflections from digital sensors ("DG").

This circular fisheye lens from Sigma is the world's only 8mm lens with full autofocus capability. With some speciality uses as well as the novelty images it can produce, we take a look at it's capabilities.

High optical resolution; Good control of aberrations; Compact size and weight

Restricted uses (but it is a specialised lens; Expensive if only being used for the fun element

This circular fisheye lens from Sigma is the world's only 8mm lens with full autofocus capability. With some speciality uses as well as the novelty images it can produce, we take a look at it's capabilities.

High optical resolution; Good control of aberrations; Compact size and weight

Restricted uses (but it is a specialised lens; Expensive if only being used for the fun element

Real Fun-lens - funky-punky.... optically very strong, sharp, complete circle (not that bullshitcercle from Peleng 8) nearly without flare (forget the cheepo-Pelengo....!). Very good construction, but take care of the frontlens.

Fantastic perspective - 360 = FUN - sharp; nice buildings; very few CA´s; NO FLARE

take care on the frontlens

Sigma's super multi-layer coating and Special Low Dispersion (SLD) glass provide excellent image quality for digital and film SLR cameras. The special fisheye design allows maximum creative expression.