Originally posted by mactattie All I currently have are the kit 18-55 and a 50mm prime. I'd like a telephoto for getting pics of my kids playing football and wildlife/nature shots when I'm out and about. Was also thinking of a better quality lens from the 17/18-50/55 range for landscapes?
I'm a beginner with dslr's so all help is appreciated!
As others have indicated, there are plenty of good (and more expensive) lenses to choose from, but I can tell you that I have your kit lens (18-55) as well as expensive primes and long lenses and have spent a small fortune on that. The truth is that the 18-55 you have is capable of getting wonderful landscape shots with your K50 (which I also have and use). I would encourage you to go out and use that lens to death, until you feel you've really exceeded its capabilities (which I feel is actually harder to do than we think). Some of my favorite shots are ones I took with that inexpensive little lens... beautiful colors, amazing rendering for a lens that doesn't enjoy much of a reputation. It's still in my bag and gets used regularly.
For your longer shots (you mentioned kids sports and wildlife), the also-kit 50-200 makes a great, inexpensive companion to the 18-55 and can be had for a song here on the forums. I have lots of great shots from it as well. It won't get you the reach of a 300 FL, but won't eat up your wallet, either. If you have more cash, then I would go for something that will get you to 300mm. I split my time between landscape and wildlife and can tell you that 300mm is probably the minimum you'll want to use for getting close to critters. I find anything less to be frustrating.
You described yourself as a beginner, so my advice is directed at that. IMHO, unless you're into collecting, it's best to max out your capabilities on a lens you have before spending money on "better" gear. I'm continually blown away by images I admire and then look to find they were taken with a humble lens. Many examples of this are found on this forum but, daily, I see increasing evidence of it on the Pentaxian Facebook page. It's inspiring.