8mm circular fisheye zooming to 15mm rectilinear fisheye
LIMIT switch prevents the lens from zooming any wider than 10mm
gives full frame fisheye at 10mm on APS-C cameras, at 12mm on APS-H cameras and at 15mm on full frame cameras
14 elements in 11 groups, 1x aspherical and 1x UD element, floating system
flourine coating to reduce fingermarks, etc
rear gelatin drop-in filter slot
IR marker
7 rounded blades
USM AF with full time MF
close focus 0.15m giving 0.34x magnification
78.5mm x 83mm long
540g
plastic bayonet hood and lens cap attaches to hood - both must be removed at 8mm
weather sealing at mount
$US1400