Quote Originally Posted by Renato Tonelli View Post
I have the f/4 version: very sharp, an excellent lens. I have been using it the past two weekends to photograph flowers. It is common knowledge that Pentax lenses are underrated; it is the opinion of many photographers that they match the performance of Nikon's and Canon's offerings.

Thanks everyone for the positive comments: I will be picking it up this weekend.

Further observations/samples welcomed!