I own a Pentax K10D, along with a Pentax kit 18-55, a Pentax 50mm 1.7, and a Tamron 70-300mm f4-5.6 with a macro switch for 180-300 built in, but I'm having trouble capturing a tack sharp photo of butterflies and bees. I'm not very experienced, and I'm sure my inexperience has a lot to do with it, but I also feel if I had the proper lens I'd do much better, so before I sell this K10D, I'd like to give it a try with another lens for what I'm looking to shoot. I can sure use your help. I'm not sure what my top $ amount for a lens would be at this point.
