Very good shot; love the clarity in this. As to whether you need a macro lens the answer is definitely YES; you'll start to look at the world with a fresh viewpoint. I've got two (greedy I know!!) - a 50mm and a105mm. The 50mm is great for flowers and the 105mm is also good for flowers but brilliant for insects. The 105 took a little while to get to grips with but it is now my favourite lens.
I'm already looking forward to some terrific macro shots from you!!
I'm already looking forward to some terrific macro shots from you!!