Cooke triplets

The Cooke triplet is a lens design patented in 1893 by H. Dennis Taylor, an optical manager of T. Cooke & Sons of York, and comprised of three air-spaced singlets: two biconvex (positive) elements surrounding a biconcave (negative) element in the middle. The aperture stop is just behind the central negative element. This is the simplest design that is capable of correcting all of the seven Seidel aberrations over a wide field of view. It is one of the most important lens designs in the history of photography.
Asahi Takumar 100mm F/3.5 • ⌀46 1957 ●
Asahi Takumar 1000mm F/8 [334, 43340]Pro 1958 ●
Asahi Takumar 100mm F/3.5 • ⌀33.5 1952 ●
Nippon Kogaku Nikkor-T 350mm F/4.5 • S.IXPro ●
Nippon Kogaku Nikkor-T 500mm F/5 • ⌀110Pro ●
Serenar 100mm F/4 [I] • S.VI 1948 ●
Serenar 100mm F/4 [II] • S.VI 1950 ●
Carl Zeiss Jena Triotar 85mm F/4 [T] • E40.5 1932 ●
Carl Zeiss / Zeiss-Opton Triotar 85mm F/4 • E40.5 1950 ●
Meyer-Optik Gorlitz Trioplan 100mm F/2.8 V • ⌀49 1955 ●
Meyer-Optik Gorlitz Trioplan N 100mm F/2.8 [V] • ⌀55 1960 ●
Zeiss Ikon Color-Pantar 50mm F/2.8 • B50 1966 ●
Leitz Wetzlar Elmar 90mm F/4 [II] [11830, 11128] • E39 1964 ●
Leitz Wetzlar Elmar 90mm F/4 [II] [11730] • E39 1964 ●
Tokyo Kogaku Topcor 90mm F/3.5 LSM • ⌀34 1956 ●
Minolta Rokkor-TC 100mm F/4 • ⌀43 1959 ●
Minolta Rokkor-TC 100mm F/4 • ⌀46 1960 ●
Minolta Auto Rokkor 100mm F/4 Bellows • ⌀55Pro 1968 ●
Minolta Rokkor-TC 135mm F/4 • ⌀46 1960 ●
Minolta Rokkor-TC 135mm F/4 Bellows LSM • ⌀46Pro 1961 ●
Multi-system lenses (6)
Meyer-Optik Gorlitz Trioplan 50mm F/2.9 [V] • ⌀35.5 1952 ●
Meyer-Optik Gorlitz Domiplan 50mm F/2.8 • ⌀49
akaPentacon Orestor 50mm F/2.8
akaPentaflex-Color 50mm F/2.8		 1961 ●
Carl Zeiss Jena UV-Objektiv 60mm F/4Pro ●
Meyer-Optik Gorlitz Trioplan 100mm F/2.8 [V] • ⌀49 1952 ●
Carl Zeiss Jena DDR Triotar 135mm F/4 [T] Type 2 ●
Carl Zeiss Jena DDR Triotar 135mm F/4 T Type 1 1946 ●
Nippon Kogaku Nikkor-T 105mm F/4 • ⌀34.5 1960 ●
Nippon Kogaku Nikkor-T 105mm F/4 (1426 units) • ⌀34.5 1959 ●
Nippon Kogaku Nikkor-T 350mm F/4.5 (429 units) [Reflex housing] • S.IXPro 1959 ●
Nippon Kogaku Nikkor-T[·C] 500mm F/5 (187 units) [Reflex housing, Visoflex] • ⌀110Pro 1952 ●
Kuribayashi K.C. Petri Orikkor 105mm F/3.5 • ⌀46 1959 ●
Petri C.C Auto 135mm F/3.8 • ⌀52 1967 ●
Petri C.C Auto 135mm F/3.8 EE • ⌀52 1969 ●
Third party 35mm full frame lenses (23)
MS Optics Super-Wide Triplet Perar 21mm F/4.5 MC • Pancake lensPro 2015 ●
MS Optics Super-Triplet Perar 24mm F/4 MC • Pancake lens 2014 ●
MS Optics Super-Triplet Perar 28mm F/4 MC (180 units) • Pancake lens 2012 ●
MS Optics Super-Triplet Perar 35mm F/3.5 MC (200 units) • ⌀19 • Collapsible • Pancake lens 2010 ●
MS Optics Super-Triplet Perar 35mm F/3.5 MC II (450 units) • ⌀19 • Collapsible • Pancake lens 2011 ●
Steinheil Munchen Cassaron 40mm F/3.5 VL • ⌀34 1952 ●
Steinheil Munchen Cassarit 50mm F/2.8 ●
Steinheil Auto-Cassaron 50mm F/2.8 Type 2 for Edixa ●
Steinheil Munchen Cassarit 50mm F/2.8 for Edixa ●
Steinheil Auto-Cassaron 50mm F/2.8 Type 2 ●
Steinheil Auto-Cassaron 50mm F/2.8 Type 1 ●
Steinheil Munchen Cassar S 50mm F/2.8 • ⌀40.5 1955 ●
Carl Zeiss Jena Triotar 85mm F/4 LSM ●
Kenko 85mm F/2.5 Soft MC [T] • ⌀52 1987 ●
Enna Munchen Ennalyt 95mm F/2.8 • ⌀52 ●
Steinheil Cassarit 100mm F/3.5 [BV] • ⌀49 1966 ●
Steinheil Auto-Cassarit 100mm F/3.5 • ⌀49 1966 ●
TTArtisan 100mm F/2.8 • ⌀49 2023 ●
TTArtisan 100mm F/2.8 M • ⌀49 2023 ●
Feinmess Dresden Bonotar 105mm F/4.5 V • ⌀40.5 1956 ●
Steinheil Munchen Cassar 105mm F/3.8 VL 1952 ●
Sankyo Kohki Komura 105mm F/3.5 LSM • ⌀43 ●
Steinheil Cassarit 135mm F/4.5 • ⌀49 1966 ●
Tokyo Kogaku R. Topcor 90mm F/3.5 • ⌀49 1958 ●
Tokyo Kogaku Macro-Topcor 135mm F/4 Bellows • ⌀49Pro ●