The last version in M42x1 mount.
Zenitar 2.0 / 50mm
MC Zenitar-M2s 2.0/50mm, delivered with the Zenit 312m on January 20th, 2010.another delivered with the Zenit 412ls on February 15th, 2010.
An internal competition was launched at KMZ to replace Helios 44; Here is the version that has been adopted as standard lens for Zenit 212K and last Zenits made. Different versions exist (K, M, K2, M2, M2s) based on slight modifications of the frame structure and materials used (plastic)(based on www.zenitcamera.com)
MC Zenitar-K2 2.0/50mm, arrived with the Zenit KM Plus on november 14th, 2009.
The bayonet version.
Tests: Please note that these tests were made with the means at hand, not in a "scientific" way. See here.
Amazing lens in the center from full aperture, less good on the edges like any Russian 50mm lens. The color saturation is excellent. This is my favorite standard lens. Use from full aperture for a beautiful blurring of background, or at f: 8.0 for an homogeneous image all over the field.