This lens gets mediocre reviews over on the Pentax Forums. I happen to like it. These first 3 test shots were all taken wide open. I'll add more at different focal lengths anon.
Not a scientific test, it was windy, camera wasn't on a tripod, distance would have varied slightly but I did this just for fun. I'll probably add more at a later date. I'll leave you to make of this what you will.
Not really a review of said lenses, just me playing with them and uploading the results. First up was the The Helios 44 58mm f2 loads of them about apparently, so they are as cheap as chips. It's an odd name and have to say I get confused by this sometimes, but it's 58mm F2 lens not 44. For a cheapy lens it performs quite well