SMC Pentax Fish-Eye 17mm f4 brand_Arca Swiss dust and minor haze on

dust and minor haze on the optics

for a 300mm lens

slightly unusual but not un-useful zoom range

even after they've been cleaned by other methods

75x (model VCL-ECU1) is designed for use with Sony's E 16mm f2

SMC Pentax Fish-Eye 17mm f4 brand_Arca Swiss dust and minor haze onThe Pentax Fish Eye 17mm f4 is a tiny fisheye lens with full 180 degree corner to corner coverage on 35mm film (or full frame digital). It extends only about 3. 5cm from the lensmount and has a built in rotating turret of filters with orange, yellow, UV, and skylight options. Clean glass, smooth focusing, clean diaphragm, and only very minor cosmetic wear.