Originally posted by nj1975 Have any K5II users any experience with the 77 1.8 limited lens please? - I am particularly interested in it's autofocus ability as my purpose in buying this would be documenting daily life of kids (moving!) indoors. Many thanks.
I have a K7 and the 77mm F1.8 ltd. It absolutely deserves all the rave reviews it gets but it is not fast to autofocus. You might want to consider the Sigma 85mm F1.4 as another top notch lens that is a bit faster in the autofocus department. It has internal autofocusing rather than screw drive autofocusing.
I also have the Sigma 70mm F2.8, which has great IQ and has a focus limiter. I have found it a little better than the 77mm F1.8 for moving subjects.
I understand that the K5II is better than the K7 for autofocusing but I still think you might want to get another lens than the 77mm F1.8 now, then follow up with the 77mm F1.8 next.
Every Pentax shooter should get the 77mm F1.8 eventually : )