This lens' optics is the same as that of the second version, MFD is increased to 45cm and plastic construction for cost cutting.
The lens used to come as a body cap when you buy a Praktica camera, that is why I have more than seven of them at one time.
But the lens is good, it is only inferior at WO comparing to Pancolar/Prakticar 50/1.8 v.1. The most cost effective normal lens.