Canon J14ax8.5B4 IRS 8.5-119mm F/1.7 B4 Internal Focus Video Zoom Lens for 2/3" Sony / JVC or Panasonic GH1, GH2, AF100, Olympus E-P1, E-P2, E-P3 B4 2/3" Video lens can be adapted to: Panasonic AF100 / AF101 / AF102. Panasonic G1, GH1, GH2, GF1, GF2, G2, G3 Olympus PEN E-P1, E-P2, E-PL1, E-P3, E-PM1, E-PL3. B4 to Micro 4/3 adapter required (Available seperately, Amazon ASIN: B006WRAZYQ ) FIXED APERTURE OF F/1.7 - Great for low light. WIDE ANGLE TO TELEPHOTO ZOOM - 14x Zoom Range of 8.5-119mm (35mm equivalent is 34-476mm). Professional Video lens features: STEPLESS IRIS, PARFOCAL (Maintains focus across entire zoom range), MACRO MODE for close-up.