AstrHori, makers of such optical oddities as the 18mm f/8 2x Periscope Probe Macro lens, has announced a new circular fisheye lens for APS-C cameras. The AstrHori 6.5mm f/2 fisheye is a fully ...

Looking now at the newest version, the HD Pentax-DA Fish-eye 10-17mm f/3.5-4.5 ED, the lens is very compact for such a wide angle, measuring just 67.5mm x 70mm, and weighs in at a modest 323g. The ...