PANASONIC LUMIX G FISHEYE 8mm f/3.5

US 2012/0147254 A1 — Nobuyuki Adachi, Takuya Imaoka

10 ELEMENTS / 9 GROUPS
f = 7.850 mm patent / 8 mm marketed
F/3.5 marketed; patent F/2.951
180° diagonal fisheye
1 ED ELEMENT

Focus Mechanism

Inner focus by L9. Variable gaps reproduce the patent's 1 m state; production MFD is 0.1 m.

Optical Elements (10 physical)

ElementTypeGlass
L1Negative MeniscusS-LAL14 (OHARA)
L2Negative MeniscusS-LAL14 (OHARA)
L3Positive MeniscusS-TIH6 (OHARA)
L4Biconcave NegativeS-FPL51 (OHARA)
L5Positive MeniscusNBFD15 / NBFD15-W (HOYA)
L6Positive MeniscusS-LAH66 (OHARA)
L7Positive MeniscusS-BAL35 (OHARA)
L8Negative MeniscusS-TIH53 (OHARA)
L9Biconvex PositiveS-PHM52 (OHARA)
L10Biconvex PositiveN-BK7 class (SCHOTT / S-BSL7 equivalent)