Hi There, I've had the lens for over a year now and I have had some success... However, my bird photography isn't making me happy.. I've got some nice landcape and aviation images but just cannot nail birds... not sure if it's me or the lens... Just a few days ago I took a couple hundred shots with maybe 4 or five that I fee are just ok... lovely colours, but eith too much noise, not crisp enough or just not sharp enough... not sure how to post images here.