Originally Posted by georgweb 
@Miserere,
your 2.8/28 looks very similar to Cosina's making of this lens, aka Revuenon aka whatnot-company. Focusring and aperture ring look the same. Aperture clicks on this one are on the heavy side, right?
Yes they are! But not too heavy to be annoying; I actually find them...reassuring, if you know what I mean. I'll have a look around to see what I find on the net about Cosina.
Thanks, (other) George!