Olympus PEN E-P2&Carl Zeiss Tessar T✶ f2.8/45mm
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Camera & Lens for photo: Olympus OM-D E-M5 & Panasonic Lumis 20mm f/1.7.
I still own a few lenses from back in 'analog times', a few being of the 'Made in Japan' Carl Zeiss brand, with a Contax/Yasicha (C/Y) mount. With the help of an adapter these older lenses work just fine with modern, digital cameras, all of them with sensors quite a bit smaller than the full frame (36x24mm) 135-film they were originally made for. With no electronic connection between lens and camera, both aperture (f-number) adjustment, as well as focusing, have to be done manually.
Even with the German built NOVOFLEX adapter connected, the lens 'set up' is rather smallish in size and weighs less than 110 grams.
Tessar T✶ 2.8/45 Carl Zeiss Contax AEJ pancake. Exceptional sharpness in the classic Tessar 4-element design -"The sharpest pancake lens ever made"!
Lens Composition 4 elements, 3 groups
Angular Field 50 degrees
Minimum Focus 0.6m (2 ft)
F stop scale f2.8-4-5.6-8-11-16-22
Filter connection Screw-in type, 55mm screw in type (with 49/55 ring)
Lens Hood No 4 metal hood (with 49/55 ring+55/86 ring), screw-in type
Weight 90 grams (3.2 oz)
Lens Size 60x 18mm (2-3/8 x 11/16 in)
Lens Cap 49mm K-41, snap type
Lens for photo: Panasonic Lumix 20mm/f1.7