1.4x or 2x TC for 100-400?

[Eric Virkler]

I will be buying a teleconverter soon to go with Canon's 100-400. Any recommendation between the 1.4x and the 2x? I know that I'll be losing autofocus (using the Canon 50D) but I'm satisfied using LiveView to manually focus during the situations where I'm planning on using the TC. Are there noticeable differences in the quality between the two teleconverters?

Eric Virkler
Faces of Nature Photography
www.ericjvirkler.com

[Axel Hildebrandt]

The image quality with the 1.4x TC will be noticeably better.

[Charles Glatzer]

Eric,

The 1.4x is pushing the limits, with 2x not recommended at all with this lens.

Chas

[arash_hazeghi]

1.4 is a better choice with a zoom and f/5.6 lens.

[Eric Virkler]

Thanks a lot for the quick response guys. I'll place my order tonight.

Eric

[john j. henderson]

Neither, putting a tele on a semi-soft lens will make it even more soft.

[Ed Cordes]

I have had spotty results witht he 1.4 and 100-400. If you use it stop down to F 10 or more to get decent results. If I stop down sharpness is acceptable, on my lens, but not stellar.

[John Goldman]

I tried the 2X with a 100-400, no good. I do not recommend.

[Eric Virkler]

Thanks for all the help
Eric

[Fabs Forns]

I like to push the limits.
Here's one with the 1.4X:

http://www.birdphotographers.net/for...ad.php?t=56854

[Fabs Forns]

Neither, putting a tele on a semi-soft lens will make it even more soft.

I beg to disagree on the softness of the lens. Check out this long thread if you have the time or desire:

http://www.birdphotographers.net/for...ad.php?t=55985