Originally posted by Driline You can purchase a used DA*200 or DA*50-135 cheaper than a new Tamron.
I paid $650 from Adorama for my DA*200 and $600 for my DA*50-135 off of eBay. No problems with either lens.
But then you have average Pentax SDM focusing speed, as opposed to the Tamron which is pretty darn fast. I'd buy the Tamron new, because it has a fairly high return rate, and you definitely don't want to get it from some place you can't exchange it. People get really good ones, but they also get sample s that are DOA or worse, fail after a few weeks. For myself, two lenses to cover the range of one doesn't make any sense. I tend to favour heavy, over the necessity of changing lenses.
My reason for being interested in the 200 would be as a compliment to the DA 18-135 as a light weight do everything package. IN that capacity it gives you 200mm at a half a pound less weight than my DA*60-250, which gets left home because of weight issues way too often. But going 70-200 with a couple light weight primes would really be a thing, given your situation.
All these lenses have a place, it's just a question of "do they have a place at your place?"