Outside our complex is a small pond along an access road. There usually are a lot of Canada Geese here, but scattered along the far shoreline in the pond are Great Egrets, Great Blue Herons and Cormorants. Also a few shore birds are working along the edge. It is down a slope from the road, so you are sort of shooting down at them from quite a distance so you need a long lens to photograph them. Because of the distance I was using a Tamron 150-600mm lens with a Sigma 2X teleconverter for a 1200mm field of view to fill the frame more with the birds. I am surprised the Canon R autofocuses quickly with the combination of a 2X Teleconverter on a f/6.3 zoom lens. With the 2X teleconverter on the Tamron 150-600mm f/6.3 lens, my wide open f/stop was f/13. So I stoped down to f/16 to help with shrapness. My Canon 1D Series bodies would not autofocus past f/11 if you stacked teleconverters.
Wow, these are very nice, Reed!!
Thanks Donna! I am still trying to get used to the Tamron 150-600mm and how it works with different teleconverters. It seems to work best on the Canon R. It has sluggish autofocus on 1D series bodies. It seems more versatile than my 400mm DO lens, which was my main Wildlife/Bird lens with teleconverters. Canon Teleconverters do not fit on the Tamron so I am trying different brands that I already own. Somehow over the years I seem to have collected a wide range of various teleconverters!