Name Manufacturer / Model	Mount Bayonet	Type Category	Year Released	Focal mm	Aperture f/	Weight g
Mamiya-Sekor C 45mm F/2.8	MAMIYA 645	Prime	1975	45mm	f/2.8	540g
Mamiya-Sekor C 45mm F/2.8 N	MAMIYA 645	Prime	—	45mm	f/2.8	475g
Mamiya-Sekor C 45mm F/2.8 S	MAMIYA 645	Prime	1981	45mm	f/2.8	470g
Mamiya-Sekor C 500mm F/5.6	MAMIYA 645	Telephoto	1976	500mm	f/5.6	2280g
Mamiya-Sekor C 500mm F/8	MAMIYA RB67	Telephoto	—	500mm	f/8	—
Mamiya-SEKOR C 50mm F/4.5	MAMIYA RB67	Prime	1974	50mm	f/4.5	780g
Mamiya-Sekor C 55-110mm F/4.5 N	MAMIYA 645	Zoom	1984	55-110mm	f/4.5	800g
Mamiya-Sekor C 55mm F/2.8	MAMIYA 645	Prime	1975	55mm	f/2.8	395g
Mamiya-Sekor C 55mm F/2.8 N	MAMIYA 645	Prime	—	55mm	f/2.8	305g
Mamiya-Sekor C 55mm F/2.8 S	MAMIYA 645	Prime	1981	55mm	f/2.8	333g
Mamiya-Sekor C 65mm F/4.5	MAMIYA RB67	Prime	1974	65mm	f/4.5	835g
Mamiya-Sekor C 70mm F/2.8	MAMIYA 645	Prime	1976	70mm	f/2.8	395g
Mamiya-Sekor C 75-150mm F/4.5	MAMIYA 645	Zoom	1982	75-150mm	f/4.5	975g
Mamiya-Sekor C 80mm F/1.9	MAMIYA 645	Portrait	1976	80mm	f/1.9	420g
Mamiya-Sekor C 80mm F/1.9 N	MAMIYA 645	Portrait	—	80mm	f/1.9	420g
Mamiya-Sekor C 80mm F/2.8	MAMIYA 645	Prime	1975	80mm	f/2.8	255g
Mamiya-Sekor C 80mm F/2.8 N	MAMIYA 645	Prime	—	80mm	f/2.8	220g
Mamiya-Sekor C 90mm F/3.8	MAMIYA RB67	Telephoto	1974	90mm	f/3.8	805g
Mamiya-Sekor C 90mm F/3.8 Golden Lizard "RB67 11th Anniversary"	MAMIYA RB67	Telephoto	1982	90mm	f/3.8	—
Mamiya-Sekor C E 70mm F/2.8	MAMIYA 645	Prime	—	70mm	f/2.8	285g
Mamiya-Sekor Fisheye Z 37mm F/4.5	MAMIYA RZ67	Fisheye	—	37mm	f/4.5	1280g
Mamiya-Sekor Fisheye Z 37mm F/4.5 [W]	MAMIYA RZ67	Fisheye	—	37mm	f/4.5	1280g
Mamiya-Sekor Macro C 140mm F/4.5	MAMIYA RB67	Macro	—	140mm	f/4.5	800g
Mamiya-Sekor Macro Z 140mm F/4.5	MAMIYA RZ67	Macro	—	140mm	f/4.5	810g
Mamiya-Sekor Macro Z 140mm F/4.5 [W]	MAMIYA RZ67	Macro	—	140mm	f/4.5	810g
Mamiya-Sekor NB 127mm F/3.8	MAMIYA RB67	Telephoto	1973	127mm	f/3.8	—
Mamiya-Sekor NB 90mm F/3.8	MAMIYA RB67	Telephoto	1974	90mm	f/3.8	—
Mamiya-Sekor Reflex C 500mm F/8	MAMIYA 645	Mirror	1982	500mm	f/8	880g