The Pentacon Prakticar 28 mm f/ 2.8 MC is a wide-angle prime lens with multi-coating, manufactured by the VEB Pentacon Dresden (Feinoptisches Werk Görlitz) from 1971 till 1991. It is an update version of the Orestegon 28 mm f/2.9.
The lens came in three versions: the 1st had a metal barrel, the 2nd had a plastic barrel. The 2nd version was produced under the brand names of the Carl Zeiss Jena P and the Meyer-Optik.
In the present review the characteristics of the bayonet version (see Picture 1) are given.
Screw mount version has the following differences:
Minimum focusing distance - 0.22 m;
Filter diameter - 52 mm;
Length: - 50 mm;
Weight - 340 g.
Colleague xenontik affirms that the bayonet version of the lens catches on the mirror on the Cannon FF camera. The screw mount version doesn't catch on the mirror (we must thank Colleague konsigr for the information).