Since it came on the market my recommendation in the super zoom range is the Tamron SP 150-600mm f/5-6.3 Di VC USD G2. It's a fantastic lens especially for the bucks. Another thing to remember it may be night time where you are but it is always daylight on the Moon. Use the Looney 11 Rule. Get DPP4 form Canon and shoot raw never jpg.
A good tripod is required.
EB EOS 1DX and 1D Mk IV and less lenses then before!
