I recently purchased the sony a300 and it came with the kit lens 18-70mm f 3.5, and a 55-200mm f 4-5.6 telephoto zoom lens. I am now trying to figure out what other lens would be best for me to either purchase or begin saving up for to get? The main things that i have been shooting with my camera is alot of outdoor scenery/nature photography and my 4 month old nephew and girlfriend. I'm guessing i would need a good wide angle for the nature stuff and a good portrait lens for the other stuff. I am not apposed to buying used lens, i know alot of older minolta's will fit on the a300. I am not looking for lens' that will cost me an arm and a leg as this is just a weekend hobby of mine, but i would like to still get some good image quality. So if anyone could recommend the best lens' for these types of situations i would be very appreciative. Thanks!