see also:

• Canon EF lenses
• Canon EF 15mm f/2.8 fisheye

• a unique lens introduced in 2011
• world 1st fisheye zoom lens going from a circular fisheye at 8mm to a 180deg diagonal view covering the full frame at 15mm

• 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

• http://kenrockwell.com/canon/lenses/8-15mm.htm
  • image gets smaller as focused more closely
  • minimal flare but some lat. CA towards edges
  • sunstars are muted, and only visible at the smallest apertures
• http://www.northlight-images.co.uk/reviews/lenses/canon_ef8-15f4l.html
• ePhotozine
  • centre sharpness is best at f/4 but overall sharpness best at f/5.6 at 15mm and at f/8 at 8mm
  • 2.3px lat CA at edges at 15mm
• photozone.de
• http://www.cameralabs.com/reviews/Canon_EF_8-15mm_f4L_Fisheye_USM/