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

This lens is the one to pull out when things are slow and wouldn't normally attract interest. With this lens, almost every photo taken is in a perspective never seen by anybody, and thus looks very unique.

Sharp all around! It is crisp and very sharp up until its far far edges; F/5.6 and higher get you sharper shots up until F/16; After F/16, you're just compensating for an intense light source, Versatility: The many uses it has can seem almost endless.

Sharpness below F/5.6: Tends to be a bit soft on distant objects, but thats not what the lens is for; The F/3.5 aperture is perfect for objects with no depth, such as astro-photography, but thats not a common photo; Eyes tend to not focus too well at F/3.5, Exposed lens: The lens is quite out there.

I have used this fisheye lens to shoot several events and wedding receptions. It does a great job helping capture very wide angled shots of entire Churches and reception halls. People standing to my far right can easily be captured in the shot due to the 180 degree angled lens.

This AF circular fisheye is very sturdy and well built lens; It gives a stunning 180 degree sngled view for stunning artistic shots

None to date except from time to time the autofocus ring can move easily during hand placement

I have used this fisheye lens to shoot several events and wedding receptions. It does a great job helping capture very wide angled shots of entire Churches and reception halls. People standing to my far right can easily be captured in the shot due to the 180 degree angled lens.

This AF circular fisheye is very sturdy and well built lens; It gives a stunning 180 degree sngled view for stunning artistic shots

None to date except from time to time the autofocus ring can move easily during hand placement

This lens is STURDY; Very high quality optics; Crisp, clear, and wide every time :D

Price :

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").

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

i love this lens using it for video but couple of time try to shoot some pic also very sharp to i really recommending this lens for photographer and videographers who shooting with no full frame cameras

Adds a flexibility to a wedding photographers kit. Have used successfully with a rayflash ring flash adapter to produce "Jarvie Window" images (look it up) at weddings and parties.

Consistent Output; Durable; Easily Interchangeable; Lightweight; Sharp Focus