Sigma 18-300 HSM K Mount $270
Anytime I'm outdoors with family I will want wide angle one moment for humans, and 9001mm (it's over 9000) if I could have it for that bird in the next county. And there's no time to change lenses. Hence, the appeal of the superzoom. This one seems very highly regarded, and I recall trying to find one used a year ago and could only find one, anywhere, and it was $500.
Someone buy this before I do... I'm supposed to be looking for a lens for the Olympus, not my Pentax...
First link is the lens for sale, second is a review page, and the third is a dude's Flickr page who shoots almost exclusively with that lens...and wow. Man. Wow. Can't believe a superzoom can do that. Yes, I'm high on his Flickr feed. 😛
https://www.bhphotovideo.com/c/product/802543765-USE/sigma_886109_18_300mm_f_3_5_6_3_dc_macro.html
https://www.pentaxforums.com/userreviews/sigma-sigma-18-300mm-f35-63-dc-macro-hsm-c.html
https://www.flickr.com/photos/shastajak/page1
Side note, Sigma makes a filter lens for just for this that increases magnification:
