RODENSTOCK GRANDAGON-N 65mm f/4.5 — Optical Cross-Section & Ray Tracing

Home / Lenses / Rodenstock / RODENSTOCK GRANDAGON-N 65mm f/4.5RODENSTOCK GRANDAGON-N 65mm f/4.5DE 2444954 A1 Claim 4 — Rodenstock / Schlegel & Weiß
8 ELEMENTS / 4 GROUPS
f′ = 65 mm; EFL ≈ 64.83 mm
F/4.5
105° COVERAGE / 170 mm IMAGE CIRCLE
ALL SPHERICAL
Focus MechanismUnit focus by view-camera bellows or helicoid; final air space varies from infinity to a representative 0.7 m subject distance.
Optical Elements (8)ElementTypeGlass
L1Negative MeniscusFK3 class (Schott legacy fluorite crown; patent e-line values)
L2Negative MeniscusUnmatched (SF5-class dense flint; patent e-line values)
L3Biconvex PositiveSSK2 class (Schott dense special crown; patent e-line values)
L4Biconcave NegativeUnmatched barium-flint / short-flint class (patent e-line values)
L5Negative MeniscusUnmatched barium crown / BaK class (patent e-line values)
L6Biconvex PositiveUnmatched dense crown, SK-class (patent e-line values)
L7Negative MeniscusUnmatched high-index barium-flint class (patent e-line values; Claim 4 prints v_e = 46.13)
L8Negative MeniscusFK5 / N-FK5 class (Schott fluorite crown; patent e-line values)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Negative Meniscus	FK3 class (Schott legacy fluorite crown; patent e-line values)
L2	Negative Meniscus	Unmatched (SF5-class dense flint; patent e-line values)
L3	Biconvex Positive	SSK2 class (Schott dense special crown; patent e-line values)
L4	Biconcave Negative	Unmatched barium-flint / short-flint class (patent e-line values)
L5	Negative Meniscus	Unmatched barium crown / BaK class (patent e-line values)
L6	Biconvex Positive	Unmatched dense crown, SK-class (patent e-line values)
L7	Negative Meniscus	Unmatched high-index barium-flint class (patent e-line values; Claim 4 prints v_e = 46.13)
L8	Negative Meniscus	FK5 / N-FK5 class (Schott fluorite crown; patent e-line values)