Hi all, I've recently thinned out my dry cabinet and am now left with just 2 lenses that I use regularly. Plan is to build up the collection again with better quality lenses, but all I have now to use on my Canon 70D are the Tamron 150-600 and Canon 100mm macro. I'll be making a trip to the bird park this weekend, and am seeking advice for the best lens or lenses to bring along. In addition to the birds in the enclosures, I'm hoping to be able to get some BIF shots, perhaps from the Birds of Prey show. Would my Tamron 150-600 be good to bring or is it too long? Is it necessary to rent a normal telephoto lens instead (e.g. 70-200 f4)? My target subjects are birds only, so I won't need a wide angle or portrait lens to take pictures of people or group shots.