Canon 70-300mm + teleconverter....yea or nay?

[photostar_1]

I have been told that you cannot fit a teleconverter to the 70-300mm IS USM lens. Is this correct and if not, why not? I don't understand :shrug: :help:

[Jonnyreb]

The Canon converters protude into the barrel of the lens - only some of the telephoto L series can accommodate. 3rd part TC's don't protude so will fit. The advantage of the Canons is that they close that distance between lens elements and preclude any stray light

[photostar_1]

Thanks Johnny!

[PaulBoy]

I use a Kenko Pro 1.4TC on my Nikon 70-300mm with no problems full a/f etc so don't be completely put off w/o checking compatibility with your lens - apart from the 1 stop loss of aperture you'd never know it was there?
Paul ;)