Originally posted by dadipentak I mean, those lenses!
Many people (or most of them) here mention lens lineup as a main reason to stay. Funny is, I left mostly because of the lenses. I fully agree that Pentax has a wide range of APSC lenses and I really loved some of them. But while I loved the recent ones (16-85mm, 15mm, 70mm...), I was not so raptured by the older ones. For example the wideangle lenses. I really loved my HD DA 15mm Limited, it was so small and light, while optically nice, it was my main hiking lens. But there were times when I felt a need for something a bit wider and most importantly faster (f4 was unusable at night or indoors), so I looked at the two possibilities: the 12-24mm and 14mm. However the zoom, while wider, was the same f4, so not an improvement. The 14mm f2,8 looked ideal on paper, both wider and faster. However it was way bigger and heavier than the 15mm and optically no match to beautiful Limited. This is where some Pentax lenses show its age: a lens introduced in 2004 (one of first DA lenses, made for first DLSRs with only 6 MPx) struggles a bit on modern cameras. And Pentax had seemingly no intention of upgrading these old lenses (at least new HD coating etc.). The new wideangle zoom has been in the roadmap for years, and when it finally came close to production, Pentax kept delaying it (recently a release date no earlier than 2019); plus it seems it will be huge. So despite having a lot of lenses, many of them are old and not that great and new or upgraded APSC lenses dont come.
Now I bought a Fuji 14mm f2,8, exactly the same specs as Pentax 14mm, however much smaller and lighter (235g vs. 420g). So it has exactly what I have been looking for: a lens that is wider and faster than Pentax 15mm, yet only marginally bigger and with the same optical quality (if not better).
So while for the majority Pentax lenses are the reason to stay (and it is a perfectly acceptabe reason), for me paradoxically it was a reason to leave.