This New Sigma 4.5mm F2.8lens is the first 180 degrees circular fisheye lens designed specifically for Sigma digital SLR cameras
It’s ideal for low light photography due to its F2.8 fast aperture.
Equipped with HSM autofocus system with full-time manual focus override is an ideal fast focus lens.
The Sigma 4.5mm lensis uses SLD glass which minimizes colour aberration Equisolid angle projection method for art and scientific can be achieved with this superb lens.
Sigma HSM 4.5mm F2.8 has minimum focusing distance of 13.5cm and a maximum magnification of 1:6.
Sigma 4.5mm Circular fisheye AF lenshas an angle of view of 180 degrees in all directions. It produces circular image within the frame when used in conjunction with digital SLR cameras with APSC size image sensors.
The Sigma Circular fisheye 4.5mmis capable of producing a quantifiable relationship between angle/area hence this lens can be used for arts and scientific applications such as solid angle measurements of cloud distribution over the sky or vegetation distribution of the forest. The large circular aperture of f2.8 of Sigma 4.5mm produces a bright image in the viewfinder and makes it possible to take pictures in low-light conditions, making it an optimal lens for Astrophotography and Aurora photography. Thanks to Sigma’s efforts.
Sigma Circular fisheye 4.5mmoffers the closest focusing distance of 13.5cm (5.3inch) and a maximum magnification of 1:6 so its usefull for close-up photography.
The SMC (Super Multi-Layer Coating) minimizes flare and ghosting. The Sigma 4.5mm F2.8 lensutilises the SLD (Special Low Dispersion) glass which provides effective compensation of chromatic aberration. Inner focusing (IF) system creates high definition and good image quality over the whole frame. Focusing system modernised with HSM (Hyper Sonic Motor) that guarantees fast and quiet auto focusing and allows full-time manual focus override by rotation of the focus ring.