I have a Sigma 400 mm FD lens which comes with an FD to EOS (EF) adapter. Is it possible for me to attach an extender to it. May be a 2X FD extender and then attach the FD to EOS (EF) adapter. Is ...
I am planning to buy a Canon EF 300mm f/2.8 L IS II soon, probably in the first half of next year. I plan for it to be my wildlife and birding lens, and with the 1.4x and 2x Mark III teleconverters ...