Focal Length: 50mm; Number of Elements/Groups: 6/4; Number of diaphragm blades: 12; Filter or Lens hood size: 46mm ( no filter is suggested / Lens hood is suggested but not a must ); Dimentions: 53mm x 53mm; Weight: 140g; Materials: Multi-coated optical glass; Suitable for Olympus E-P1, E-PL1, E-P2, E-PL2, E-P3, E-PL3, E-PL5, E-PM1, E-PM2, OM-D E-M5, E-P5, OM-D E-M1, OMD-EM10; Panasonic G1, G2, G3, G5, GF1, GF2, GF3, GF5, GX1, GH1, GH2, GH3, G6, GX7, GH4, GM1, GM5