The next step in the modernization was the transition from the M39 to M42 threaded mount due to the transition of SLR cameras to the M42 × 1 threaded connection with a working length of 45.5 mm, which corresponded to the threaded connection common in the world. The lens received a new name Helios-44-2, and the body became completely black. Production began in 1967 - this year Zenit-E switched to a threaded mount on the m42. Externally, the serial number began to be applied to the ring with the name.
