Your 70-200 f4 with 1.4 extender is not a good consideration

for birding I mean, you will find it too hard to autofocus and the image will not sharp at all....

Extender is only good for shooting something static, or used on prime, in my humble opinion.

Get the 100-400mm F/4.5-5.6 instead. Or get the 70-200mm 2.8

所有跟帖： 

• 回复：Your 70-200 f4 with 1.4 extender is not a good consideration -brt089- ♂ (183 bytes) () 09/02/2010 postreply 18:45:50

• X2! Autofocus does not work at all with my 2.0x on my F4.0L -dali@wxc- ♂ (113 bytes) () 09/03/2010 postreply 04:20:13

• 1.4x does work on 70-200 F4L -Able- ♂ (37 bytes) () 09/03/2010 postreply 06:06:15

• AF should still function for f/4 with 1.4x converter. -pieq314- ♀ (249 bytes) () 09/03/2010 postreply 06:08:53

• 回复：AF should still function for f/4 with 1.4x converter. -brt089- ♂ (346 bytes) () 09/03/2010 postreply 12:22:16