Sigma 10mm f2.8 EX DC Fisheye HSM for Canon EF subminiature if you use infrared film

if you use infrared film (like Rollei IR) or your digital camera is sensitive enough

autofocus function may vary based on lighting conditions

This particular example is the rarer version with index marks for Leica 7

but it's a pretty neat little package

The 1/4" inner thread can be attached easily to existing heads (just attach it like you would a camera)

Sigma 10mm f2.8 EX DC Fisheye HSM for Canon EF subminiature if you use infrared filmSigma 10mm f2. 8 EX DC fisheye lens for Canon EF mount cameras. This lens will mount to full frame and crop cameras, but it's designed for crop cameras, where the corner to corner 180 degree image will fill the frame. In excellent condition, with front and rear caps.