Originally posted by Cambo To tell you the truth, I am back thinking about the all weatherproof set DA* 16-50 + 50-135, along with a DA*300, and the DA* 55. I'd probably add the 15 (non WR) and the 100 Macro WR to that set. Or should I hang on to it, see if Pentax brings out a full-frame and a small set of lenses of limited availability, and then the price of the old full-frame lenses will either go through the roof, or plummet.
I voted for Set 2 but this new modified Set 3 sounds very compelling to me. I like the DA* zooms; I guess they are not incredible but they are very good. My two copies are sharp and haven't had any problems with the SDM.
The DA*16-50 of mine isn't super sharp when at f/2.8 and being used in the widest focal lengths but it's not bad and actually quite good compared to other APS-C zooms. Stopped down it's very sharp and when used with the 16mp K-5 it can be cropped down rather heavily while still delivering excellent detailed images. It's also a great lens for focusing closely. I use this lens a lot; it's a reliable work horse.
The DA*50-135 is a high quality lens. My only two quibbles with it are that it can be a little slow at focusing, like the DA*16-50 also can be, when compared to my FA Limiteds and it has a pretty long minimum focusing distance of almost 40 inches. The internal focusing and internal zoom features are awesome. It's a sharp lens even at f/2.8. It's my largest and longest FL lens so it's not my most used lens.
While I very much value having WR and have taken advantage of the feature several times I no longer think it's the most important thing since it only comes into play on occasion. The image quality of a lens is the most important to me as it impacts every picture taken and when it comes to great IQ the Limiteds deliver the goods. Owning two FA Ltds and one DA Ltd I've come to really appreciate the IQ and size of primes, as well as the shooting style they allow. Like a few others have suggested, I also recommend taking a serious second look at getting the FA31 instead of the DA35 macro. Both of those lenses are highly regarded and for good reason but I personally just wouldn't be able to give up the faster f/1.8 aperture and excellent OOF rendering of the FA31. The FA31 can focus very closely and with it resolving so well when it's coupled with a high MP camera you can simply crop to get the closer up shots if and when you want them. I just love the FA31 and it is what's most commonly mounted on my camera.
I've heard how highly revered the FA*85 is but I can see that it's a beast in terms of size. I have the much smaller FA77 and can't imagine it disappointing anyone. I already feel it's a little too tight of an AOV on APS-C in some situations so I can imagine how the FA*85 must feel.
I would probably rarely ever use a 300mm lens, though when I did I'm sure I'd be happy to have it. For my photography I simply haven't needed it and as such that long of a lens is way down on the wish list for me. You have your needs though and clearly want something that gets you at least close to that FL.
The FA* normal zoom you have could be a nice piece of glass to hold onto if it's got good performance, especially if a FF camera comes out in the next year or so.
The DA14 in your current collection would be the easiest one for me to let go of if I were in your situation. It's pretty big and from what I've read/seen not the best performer. The DA15, on the other hand, is fantastic. It's small and just a star performer. It's not fast though but that's the role you can hope the FA*24 that you have will eventually be able to fill for you once the FF camera appears. Really, it's that FA*24 in your collection that looks the nicest to me. It's a FL I would really like to have a prime for and it's got a nice wide aperture. If it's IQ is good then I'd want to hold onto it if it were mine.
I would have a hard time parting with either of my DA* zooms but it's the FA Limiteds that I simply won't let go. Even if I were to ever switch to another system, like to move up to FF, I would keep a Pentax body and my Limiteds. I wouldn't consider selling them to fund something else. I'm just too happy and in love with them.
Anyway, that's a glimpse at my thoughts and feelings on your dilemma. My advice: Don't make any impulsive or rushed decisions but at the same time don't put a decision off that's keeping you from getting out there and capturing the images you want. Best of luck figuring it out!