Thanks for the reply. Yes the 200 f2.8 w/ the 2x is great & have used it handheld many times w/ great success. The 2x also works great w/ 70-200 f2.8. I did not know that you could stack them either but read George Lepp's column in this month's Out...
Thanks for the response. Have 5D M III & using 300, 2.8 IS also 70 - 200. 2.8 IS. Have Extender 2X II & was considering adding Extender 1.4x III to get more. Am not sure & can't get any answers as to whether the II & III series are compatible. Wa...