I think the K-5 IIs is good to start. That's what I have now - didn't upgrade to the K-3 this year, because the K-5 IIs is doing the job.
Before the HS Football season starts you need to get a *300, FA*200, Tamron 70-200/2.8, or similar lens. In general I'd recommend a 300.
Don't waste your money on any of the "kit" lenses unless it's the DA18-135, which has its uses (but I still haven't needed one yet). I think you should start out with the FA77 or DA*50-135 (which can be a bit expensive if not purchased used). Don't mistake the DA*50-135 for a fast-focusing football lens, though. But otherwise it's brilliant. Then for only $200 you should supplement your FA77 or DA*50-135 with the DA35/2.4. It's very affordable, and since it was originally designed as an f/2 lens, it's quite sharp wide open at f/2.4. So you can shoot it at f/2.4 while taking advantage of the wide-open bokeh. Don't get the FA31 yet unless it's
really the focal length you're more interested in, because the same characteristics that make it so "great" also make it behave differently than any other lens I've used - so you may find it challenging to get the results you want, as I do.
As you may already know, both the FA77 and FA31 perform very well wide-open. The FA77 may also be useful for sports (I replaced mine with an FA*85/1.4, which I use for sports along with my F*300 and FA135). For sports you can get better AF performance with a screw-drive lens (unlike Canon, which optimizes its in-lens motors for sports). Since Pentax continues to sell many small, screw-drive Ltd lenses, they've optimized the screw-drive AF system instead. The only in-lens motors that are semi-optimized for sports (at least at 300mm or less) are in the DA*300 and the latest Sigma 70-200/2.8 HSM OS. I tried them side-by-side on my K-5 IIs in a gym last weekend. The DA*300 AF was OK for sports, but definitely more problematic than my F*300. The Sigma AF was
maybe as good as my screw drive primes (although I'll have to study my pictures a bit more) but definitely not better. And I also prefer the image rendering of the Pentax lenses. But the Sigma can do the job for those who like or need its characteristics.
Originally posted by JaggedZenMonkey I don't want to rush into buying anything. I need more info I guess. The 31 mm has had my eye for some time now, but the sigma lens is in a class of its own. The 77 mm may not be great for an all around lens, but I'd use her daily just the same. Most of my photos will be portraits, landscapes, and nature images so whichever is better suited for these genres will likely be my best bet for starters.
The FA31 is in a class of its own - perhaps even more so than the Sigma 18-35/1.8 (it's just not as obvious on the surface). But as you can see above, I'm not necessarily advocating that lens for you. So you should definitely get the DA35/2.4 and give yourself time to decide between the Sigma and the FA31 in the future.
The FA*85 is perhaps my most used lens, so there's nothing silly about getting a fast prime in that focal length. Even Adam's Avatar features the FA*85, so don't listen to what he says about getting the FA31 (do as he does, not as he says)!
Last edited by DSims; 03-25-2014 at 09:47 PM.