1.4x extender + F4 [Archive] - Canon Digital Photography Forums

gonças

14th of December 2008 (Sun), 18:05

Hi

I'm going to buy a 70-200 F4L soon and I was wondering if a 1.4x extender would be adviseable for this lens if I want a bit more than 200mm...

Has anyone tried this before? What can you tell me about it? Post some examples please :)

Thanks in advance :D

ChrisRabior

14th of December 2008 (Sun), 22:54

http://flickr.com/search/groups/?q=70-200mm&w=42274449%40N00&m=pool

Found the 1.4x group on flickr, and a few people had examples posted with the 70-200mm f/4L using the extender. You lose a stop (which I'm sure you already know), and it's a small loss in quality, but it looks like it's still acceptable.

gonças

15th of December 2008 (Mon), 06:19

yes yes.

Thanks a lot for the link :)

ryant35

15th of December 2008 (Mon), 08:41

Just don't try for the 2x because your 400D won't autofocus.

Jamie Holladay

15th of December 2008 (Mon), 17:36

that combo should work well for you. The only time you may have trouble is late evening low light shots.

sastein

17th of December 2008 (Wed), 20:02

Here's a couple of shots with a 5D and 30D, 70-200 f4 (non IS) and the 1.4x. It worked for me (I'm selling the f4 since I upgraded to a 2.8) fine. Focus did slow down a little, but not as much as having the 300 f4 on the 30D. IQ is pretty good even wide open.

Photo taken with Canon EOS 5D, f/7.1 @ 203 mm, 1/100, ISO 200,
http://sastein.zenfolio.com/img/v3/p1032346241-4.jpg

Photo taken with Canon EOS 30D, f/5.6 @ 121 mm, 1/160, ISO 250
http://sastein.zenfolio.com/img/v3/p839313071-4.jpg

gonças

20th of December 2008 (Sat), 10:15

Thanks Sastein!

dinanm3atl

29th of December 2008 (Mon), 18:25

Something I want to add to my bag.

Karl Johnston

6th of January 2009 (Tue), 06:52

If you do encounter loss of quality then stop down to about 7.1 or f8 and you should get the prime results out of the 70-200 + 1.4 x extender

gonças

5th of March 2009 (Thu), 07:50

could someone post a picture taken @ 280mm F/5.6 ?

thanks in advance

bhardwaj.deepak

5th of March 2009 (Thu), 07:54

What is the point for getting 1.4 and not 2x converter? Does it reduces the IQ substantially? with 1.4 you'll get 98 - 280 mm, but with 2x you'll get 140-400mm. am I wrong?

andrewc

5th of March 2009 (Thu), 14:04

2x IQ is substantially reduced, and it won't AF on anything less than a 1D

snowrdr

5th of March 2009 (Thu), 19:14

could someone post a picture taken @ 280mm F/5.6 ?

thanks in advance

Not motorsports, but here's one... :D

gonças

6th of March 2009 (Fri), 03:38

cheers snowdr :D

bhardwaj.deepak

6th of March 2009 (Fri), 08:25

2x IQ is substantially reduced, and it won't AF on anything less than a 1D

Got it. Thanks :)

PhotosGuy

7th of March 2009 (Sat), 14:57

What is the point for getting 1.4 and not 2x converter? Does it reduces the IQ substantially? with 1.4 you'll get 98 - 280 mm, but with 2x you'll get 140-400mm. am I wrong? IF you had the 70-200 f/2.8, then you could use it. It works fairly well, but I think you need to use f/11 (effective) to keep things reasonably sharp.
POTN at Waterford Hills - Open Wheel Club Racing. (http://photography-on-the.net/forum/showthread.php?t=543685)