Originally posted by AggieDad Why can't I, with a full kit of Pentax gear, recommend Pentax to a new photographer? Because I can't feel that confident that Pentax will be offering much in 5 years if they are, indeed, still in business. I think a person staring out should start out with equipment from a dynamic company that is sure to be around in the future.
I think a lot would depend on what someone is interested in, what their budget is, and what their level of interest is. Wildlife and sport photography is a niche that Pentax probably doesn't have a great set of lenses for. That said, if someone wants to dabble in that, you could do worse than the 55-300 PLM, the DA *300 or the DFA 150-450. If wildlife photography is the only thing that you are interested in, then I would agree that looking farther afield may be in order. It would take quite a bit of investment to do better than a K-3 III and DFA 150-450 though and my experience is that most beginners aren't interested in picking up a 5000 dollar lens right off the bat.
I would argue that Pentax actually has a fairly complete line up at present, particularly when you include the legacy lenses that many of us still shoot with. You can fill out a lens line up quite easily with glass from e bay for reasonable prices and have a nice start.
More than that, with the dawn of mirrorless, even if your particular brand bites the dust, most lenses are portable over to MILCs. This is at least true for SLR lenses. I'm not sure if Sony decides to shut down their FE mount cameras, if their lenses could be mount on other brand's mirrorless cameras. Seems like that would be a tougher proposition as the adapters would need to be pretty slim.
Regardless, I would have no trouble recommending a beginner to buy a gently used D500 right now and some F mount lenses. Nikon has telegraphed that they are ending SLR development, but that doesn't mean those cameras cease to exist or that they suddenly stop taking nice photos. If in 5 years, someone who owns a D500 wants to move to whatever the hot Z mount camera is at that point, they should be able to do so pretty seamlessly.
Anyway, as I said before, I think that too many beginning photographers focus on gear. My daughter started with a K-S1 and has move on to our old K-3. She really enjoys shooting with it, particularly with the DA 40 limited and is learning things about photography, framing, and light that maybe she wouldn't if she was shooting with fully automated, green mode gear. I'm sure you can learn with MILCs too, but your question had to do with recommending Pentax for someone who was beginning.