Camera Lens Collection

Brand	Coatings	Product line	Model	Aperture (ƒ)	Focal range (mm)	Optical Design (Elements / Groups)	Mount	Image Size	Filter size(s)	Serial #	Notes
Carl Zeiss		Planar	1,8/50	ƒ1.8 – 16	50	7 / 6	QBM	35mm	Front: 49	5231932	Came with Rolleiflex SL35. Has a stiff focusing ring.
Carl Zeiss Jena	T		Tessar 2.8/50	ƒ2.8 – 16	50	4 / 3	M42	35mm	Front: 40.5	4317443	Silver, Preset, too long for SP1000. "Carl Zeiss" and the "T" are etched off of the front ring.
Carl Zeiss Jena		DDR	Tessar 2.8/50	ƒ2.8 – 22	50	4 / 3	M42	35mm	Front: 49	9260148	Zebra focusing ring, and zebra aperture ring. Aperture is slow, might need CLA.
Carl Zeiss Jena		Tessar	2,8/50	ƒ2.8 – 22	50	4 / 3	M42	35mm	Front: 49	6558387	Came with Praktica IV F body, has a stop-down switch on the side, rather than an auto/manual switch.
Count: 4