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I did a search for my question, but did not locate anything, so forgive me if this already been addressed.
I shoot mainly family and enjoy some birds a few times a year. Kids are now involved in sports which is also a consideration. I have both 5d2 and 1dMk4. I am thinking I want to get something for the birds but want some versatility as well.
I am real close to convincing myself into buying a used 300mm IS tele. I figure it will provide me the capability to shoot the kids sports, while also adding a great lens for birding with the 2x converter. Part of me says wait and invest in a 500mm as for birds you can never have enough focal length, but then I lose the flexibility of the 300mm for the sports.
I have always valued the opinions shared here, so any thoughts are appreciated. Thanks in advance.
It's one of the best lenses Canon makes. Just don't expect it to be a "great" lens with your 2x for birding (even with the 1DMk4). Focus will hunt ! Sitting birds might not be an issue...BIF could get tricky. In my experience, 2x III (at 5.6) does seem to give better IQ than 2x II, fwiw.