I think I only own one crop lens. That wasn't by design initially but FF compatibility definitely factored into my decision to get the FA77 over the DA70. The major factor was that I figured the FA would be better but the bonus of future compatibility made it impossible to choose the DA over the FA once I found the FA at a price I liked.
Because the costs are so reasonable, I look to the F and FA lenses first before I look at the DA. FF compatibility was more of a bonus for me, a "well, if they make it, and if I decide to get it, then..."
It makes my decision to get FF easier. I want to see the camera and price before I buy, but I'll strongly consider it. I'd look at a wide angle FF lens to add (FA31!), but otherwise I'm pretty good to go.
---------- Post added 02-06-15 at 08:57 PM ----------
Originally posted by crewl1 I have everything I think I need now (50/50 crop /FF) and I believe going forward all new Pentax lenses will be designated DFA.
So if there is anything new they come out with that I decided to get it will be DFA.
I don't think they would continue to release DA only lenses, would they?
I suspect most of them will likely be budget lenses like the DA50 f/1.8. Nikon makes a number of DX lenses still. Virtually all of them are low cost options. There's just really no reason to make two entire lens lineups. It's too much of a hard sell for retailers, who don't want to stock 20 different lenses from every manufacturer, as well as the company itself. Too large a product line is expensive to manage.
But then Sigma makes some APS-C lenses only too. I suspect we'll see a few here and there. I think we'll see some of the Pentax DA line discontinued in time. I'd expect an update to the DA limited series and the overlaps will go away; DA35 f/2.4will remain as a budget item but the DA35 Limited f/2.8 is a bit limited if there's an update to the FA31.
The FA43, though, is interesting because it's a good focal length for both FF and APS-C. We might see that one get an update for sure.