Originally posted by mikesbike The "A" series will be fully functional with your new camera if you leave the lens's aperture ring set on "A" (Automatic) and then the aperture will be set from the camera body instead of using the ring, which is now the standard for modern lenses, most of which do not have a ring. I have been shooting with Pentax DSLRs and film SLR cameras for a long time.
Thanks Mike I received it a few days ago and started to play with yesterday, its fun to have so much light but I have to practice on manual focus I'm a little slow to reach focus. The nice thing it AF red dot in viewfinder on K-70 will show up with this lens it can help to see where exactly you are on focus
Cross posted example from the review section for this lens
Cheers
Benoit