I bought the Nikon 8-15 and no longer need my Sigma 8mm - so it is up for sale...
The lens is in excellent condition and has had very limited use. I take exceptional care of all my equipment, so you can buy with confidence!
The lens retails for $944 at Digital Camera Warehouse and so my price (not negotiable) gets you what is basically an as-new and mint copy of this interesting lens at a 25% discount.
KEY FEATURES Compatible with Full Frame and Crop Image Sensors 180o Diagonal Angle of View on Full Frame DSLRs Unique Circular Fisheye Image Super-Low Dispersion (SLD) Glass Element 6-Bladed Aperture 13.5cm Minimum Focusing Distance