***Long Post Alert***
I started my DSLR journey with the Pentax K200 coupled with the 18-250 mm at the time. This was 2009. I have had a good run subsequently graduating onto the K5 in 2013. Thanks to some great advise from fellow Pentaxians on the forum.
While I enjoyed shooting the Pentax at all times, the autofocus did frustrate me, especially on the K5 with fast lenses. However, not to the extent of giving up Pentax altogether.
Last year we had a little one and everything changed ! Literally everything
To the point that the good old K5 cannot keep pace with the sudden movements of the little one.
In line with the Mrs. advise, i decided to in for a mirrorless (small and compact ) Sony A6000 rather than a Nikon for my autofocus needs. It would have been difficult to carry two kids at the same time (read Camera bag = second kid)
Frankly I am blown away with what Sony has managed to pack in into a $600 camera. Shooting at 11fps most of my shots are infocus. I shoot with a Sigma 19mm f2.8 prime, Sigma 30mm f1.4 prime, Sony 50mm f1.8 prime and the Sony 55-210 kit lens (which I intend to replace with a fast long tele zoom which in the Sony world are quite pricey).
All said, I still love shooting Pentax !
I have the following Pentax gear
The K5
Pentax DA 50mm f1.8
Pentax DA 35mm f2.4
Pentax A 50mm f1.7
Pentax 18-250mm
Sigma 50 - 150 f2.8 (a prised possession)
Sigma 18-50 f2.8
Sigma 10-20 f4-5.6
Questions
1) Million Dollar Question - Should I hold onto my Pentax collection in the anticipation that the autofocus on one of the next iterations would be good enough? I checked the Pentax KP with the 70-200 f2.8 at a Pentax launch event in Australia and the autofocus still lags behind the competition.
2) Are any of the lenses I have compatible with Pentax FF? I understand the K1's autofocus is superior to all the other models. I could probably invest in a used K1 (In Australia even that is an expensive proposition)
3) Should I ditch my beloved Pentax gear and completely move onto Sony? Another expensive proposition but difficult decisions needs to made in the interests of greater good
I am sure fellow Pentax brethren with provide me sane advise as they have done in the past.