Sigma lens 8mm F3.5 EX DG CIRCULAR FISHEYE For Canon
Large aperture F3.5 circular fisheye lens with close up capability, optimized for use with digital SLR cameras.
This circular fisheye lens produces circular images with an angle of view of 180°and also incorporates an autofocus system to achieve accurate focusing that might be difficult through the camera`s viewfinder due to the extremely large depth of field.
F3.5 maximum aperture
This lens is perfectly suited for low light conditions indoors or at dusk.
This circular fisheye lens has a minimum focusing distance of 13.5cm (5.3") and a maximum magnification of 1:4.6 making it particularly useful for close-up photography.
Excellent optical performance
Special Low Dispersion (SLD) glass offer effective compensation of color aberration.
Reduction of flare and ghosting
Sigma's super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras,
An ideal lens for scientific applications
Due to the quantifiable angle/area relationship it produces, this lens can be used for scientific applications such as solid angle measurements of cloud distribution over the sky, or vegetation distribution of the rain forest canopy.
Gelatin Filter Holder
A holder at the rear of the lens accepts gelatin filters.
and also creates an optimum color balance.
|Lens construction||11 elements in 6 groups|
|Angle of view||180°|
|Number of diaphragm blades||6 Blades|
|Minimum focusing distance||13.5cm / 5.3in.|
|Maximum magnification ratio||1:4.6|
|Filter size||Rear (Gelatin filter)|
(diameter × length)
|⌀73.5mm × 68.6mm /
⌀2.9in. × 2.7in.
|Weight||400g / 14.1oz.|