I'm planning on renting a Tamron a little later in the year for an event. Rental agency only has the G1. Thoughts of the G1 in this case? Last event I rented the Nikon 200-500mm, which is fine, but I think a little shorter minimum focal length will help in some of the planned shooting locations, and I wanted to test a Tamron anyway, as I will consider which to buy next year. I just purchased a Tamron 70-200mm 2.8 G2, and for that, I'm pleased at the lens thus far.