Originally posted by Suhail For a wildlife tour, what should I carry as a wildlife photography lens for my Pentax K-5 IIs?
Well, first of all, you're going to be carrying 2 lenses. One will be on the K-5 IIs, and one on the K-r or K-50.
I would get a DA*300 ASAP (F* and FA*300 are also just as good - personal preference). I think you'll find that when you shoot it near wide-open (e.g. f/4.5-5.6 on the DA*300), the images come out so nice that not being able to control the FL isn't a problem. You just accept the FOV you've got, you frame within it, and you get something interesting. Perhaps the subject comes out bigger in the frame than you envisioned. But it often seems I get a better photo than what my brilliant mind would have come up with on its own, had I been able to zoom where I wanted to.
So get one ASAP (and try to prove me wrong!). Take advantage of the time you've got now to hone your skills. If you later disagree that a prime is better, then sell it. But I can assure you you'll get some nice photos with it, and unless you've had lenses like it before, you'll learn most everything you need to know before the tours. If you
still decide you need a zoom afterward, then go ahead. But the skills you will have gained (or refined) will apply to whatever lenses you finally acquire. In any case, time is your most precious resource right now, so make a choice now and then allow yourself enough time to switch up your gear again before the tour, if necessary. But I think it's better to err in favor of getting a prime first, rather than a zoom, because primes tend to force you to get better. Plus, they give you nice shots right out of the camera, without post processing (which I believe is what you're looking for).
You can skip the TC for now. At least wait until Pentax releases the new 1.4x TC, so you can decide whether you want it. And some people don't end up using TC's that much anyway.
I'd recommend you also pick up a D FA 100 WR Macro. Since you want to slow down, it'll let you look at wildlife from another angle as well. Plus it's a good 100mm non-macro lens - better than your DA18-135 (which is a great overall lens, but it's not something spectacular either).