View Single Post
      07-12-2011, 07:59 PM   #42
UdubBadger
Banned
No_Country
348
Rep
24,716
Posts

 
Drives: '04 330i ZHP
Join Date: Dec 2007
Location: Chicago Burbs

iTrader: (22)

Garage List
2004 BMW 330i ZHP  [4.75]
2011 135i  [3.73]
2008 328xi  [4.38]
Quote:
Originally Posted by Chewy734 View Post
Oops. I meant the 100-400mm f/4.5-5.6L IS.



The latter.

The 70-200 f/2.8 on my 40D gives you 200*1.6 = 320mm equivalent at f/2.8.
If you do the 1.4x TC, then on your 40D, you'll have 320*1.4 = 448mm equivalent at f/4.

If you use the 2x TC on your 5DM2 with that lens, you'll get 400mm at f/5.6.

Is that what you are trying to compare?
yeah thats right. I think thats what I'm gonna try to do the 1.4x and 70-200 2.8 IS.