If I can come up with a little extra money, would you recommend the 180mm? I would like to get some nice field pics of animals, especially of an Eastern Diamondback someday. I like to go out herping, for pictures mostly. I would also like to take some quality pictures of hatchlings, if I produce any this year, for my new website that is being built. I have a 300mm lense with a macro function, but with a minimum of 6 feet. I don't really use it for macro shots. Thank you all very much, Derek