RMC Tokina 28-85 f/4 zoom lens

Couple days ago I was at the local yard sale and spotted new (to me) zoom lens, RMC Tokina 28-85 1:4. I bought it because it had fixed f/4 aperture, Minolta bayonet (compatible with my MD-FX-NEX adapters), cost me only $10 (including manual, 72mm protective filter, both caps and carrying case) and had some kind of cool red letters on the front barrel. The lens was in pristine condition and I was very curious to try it.

I couldn't find any lens reviews on the internet,  so here is my own.