best price Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Lens for Pentax Digital SLR Cameras
Amazon: Customer Reviews: Sigma 4.5mm f/2.8 EX DC HSM Circular 4 stars. "Great for equirectangular panoramas" Combined with Nodal Ninja rotating tripod heads, I'm using this lens to produce equirectangular 360deg x 180deg
This auto focus circular fisheye lens has an angle of view of 180 degrees in all directions. It is exclusively designed for digital SLR cameras with the APS-C size image sensor. When used in conjunction with digital SLRs with APS-C size image sensors, it produces circular image within the frame. The F2.8 large aperture value produces a bright image in the viewfinder and allows photographers to take pictures in low light conditions, making it an ideal lens for Astrophotography and Aurora photography. Due to the quantifiable angle/area relationship it produces, this lens can be used for scientif
Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Lens for Pentax Digital SLR Cameras
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Sigma 4.5mm f/2.8 EX DC HSM Features :
- Fast F2.8 maximum aperture making it ideal for low light photography
- Minimum focusing distance of 13.5cm and a maximum magnification of 1:6
- Equisolid angle projection method is possible for art and scientific use
- Equipped with HSM with full-time manual focus override
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