Tele-converter questions


cks2k2

New Member
Feb 12, 2009
939
2
0
#1
Been thinking about grabbing a TC to extend my reach.
I'm on a 1.6 cropper, does that mean with a 1.4x TC my 70-200 f/4 becomes a 156.8 - 448 (70 * 1.6 * 1.4, 200 * 1.6 * 1.4) f/5.6 (losing 1 stop)?
 

Apr 7, 2010
2,560
0
0
Southern Enclave
#2
Been thinking about grabbing a TC to extend my reach.
I'm on a 1.6 cropper, does that mean with a 1.4x TC my 70-200 f/4 becomes a 156.8 - 448 (70 * 1.6 * 1.4, 200 * 1.6 * 1.4) f/5.6 (losing 1 stop)?
Correct! :) I'm not familiar with Canon line-up, but make sure the TC works on your f/4 lens first! On Nikkors, some of the f/4 lenses coupled with TCs - the autofocus is not possible...
 

Last edited:

wcljack

New Member
Nov 10, 2010
65
0
0
s'pore
#3
simple as 123.....example below

XXmm X 1.4 = xxmm......:bigeyes:
 

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