Direct comparison between the Domiplan 2.8/50 on the left and the Pentacon auto 1.8/50 Multi coating on the right.
Both pictures were taken with the Praktica MTL 5B on a tripod with aperture F2.8 and 1/250 sec. at the minimum focussing distance of the Domiplan which is about 75 cm.
The older Domiplan is superior to the Pentacon in this test.