After a while away from photography (15 years or so to be exact) I'm getting back into it. Last year I received a Sony NEX 5 (original model) as a gift and I love the form factor so I'm slowly expanding my lens collection. I photograph a lot when I go hiking/mountain biking and the 18-55 just doesn't give me the reach I want at times so I'm eyeballing Sony's 18-200 (the original model, not the LE version, and used as I couldn't stomach paying retail). Sony makes a 55-210 but then I'd feel obligated to keep the 18-55 on me as well. The 55-210 can be had for less than half the price of the 18-200 but not carrying a second lens with me is very appealing. Is there anything I'm overlooking? Besides price what are the downsides of getting the 18-200 for daytime nature photography? Tamaron makes an e-mount 18-200 but it's not quite as well reviewed as the Sony and it's pretty close in price.