Name Manufacturer / Model	Mount Bayonet	Type Category	Year Released	Focal mm	Aperture f/	Weight g
Isco-GottingenWESTAR 80mm F/2.8	EXAKTA	Prime	—	80mm	f/2.8	—
Isco-GottingenWestrocolor 50mm F/1.9	EXAKTA+ M42	Portrait	1958	50mm	f/1.9	227g
Isco-GottingenWESTROCOLOR 50mm F/1.9 Type 1	EXAKTA	Portrait	1958	50mm	f/1.9	230g
Isco-GottingenWESTROCOLOR 50mm F/1.9 Type 1b	EXAKTA	Portrait	—	50mm	f/1.9	—
Isco-GottingenWESTROCOLOR 50mm F/1.9 Type 2	EXAKTA	Portrait	1961	50mm	f/1.9	—
Isco-GottingenWestrogon 24mm F/4	EXAKTA+ M42, NIKON F, NIKON F DX, TOPCON	Wide	1958	24mm	f/4	600g
Isco-GottingenWESTROMAT 35mm F/2.8 Type 2	EXAKTA	Wide	1965	35mm	f/2.8	—
Isco-GottingenWESTRON 28mm F/4 Type 1	EXAKTA	Wide	1961	28mm	f/4	—
Isco-GottingenWESTRON 28mm F/4 Type 2	EXAKTA	Wide	1964	28mm	f/4	—
Isco-GottingenWESTRON 35mm F/2.8 Type 1	EXAKTA	Wide	1959	35mm	f/2.8	—
Isco-GottingenWESTRON 35mm F/3.5 Type 1	EXAKTA	Wide	1958	35mm	f/3.5	170g
Isco-GottingenWESTRON 35mm F/3.5 Type 2	EXAKTA	Wide	1961	35mm	f/3.5	—
Isco-GottingenWESTRON 35mm F/3.5 Type 3	EXAKTA	Wide	1964	35mm	f/3.5	—
Itorex50mm F/40 Pan Focus	T MOUNT	Prime	—	50mm	f/40	60g
JintuAF 27mm F/2.8	FUJIFILM X	Wide	2024	27mm	f/2.8	181g
Jupiter-11 135mm F/4	CONTAX	Telephoto	—	135mm	f/4	260g
Jupiter-11 135mm F/4 LSM	M39	Telephoto	—	135mm	f/4	360g
Jupiter-11A 135mm F/4	INTERCHANGEABLE MOUNT	Telephoto	—	135mm	f/4	400g
Jupiter-12 35mm F/2.8	CONTAX	Wide	1950	35mm	f/2.8	140g
Jupiter-21A 200mm F/4	T MOUNT	Telephoto	1968	200mm	f/4	740g
Jupiter-21M 200mm F/4	M42	Telephoto	1971	200mm	f/4	980g
Jupiter-3 50mm F/1.5	CONTAX	Portrait	1948	50mm	f/1.5	145g
Jupiter-3 50mm F/1.5 LSM	M39	Portrait	1948	50mm	f/1.5	160g
Jupiter-36 250mm F/3.5	LARGE FORMAT	Telephoto	1971	250mm	f/3.5	1500g
Jupiter-37A 135mm F/3.5	T MOUNT	Telephoto	—	135mm	f/3.5	410g
Jupiter-37A 135mm F/3.5 [MC]	T MOUNT	Telephoto	—	135mm	f/3.5	410g
Jupiter-6-2 180mm F/2.8	M42	Telephoto	—	180mm	f/2.8	1470g
Jupiter-8 50mm F/2	CONTAX	Portrait	1947	50mm	f/2	125g