Canon 1.4x EF Extender III worth upgrade?

[johnkiv]

I have the original version, which I used without hesitation in film days with the 135 f2.  I've stayed away from it with digital, unscientific comparison tests have looked soft to me. (I guess that is no surprise.)  Has anyone used the latest version?  Is it noticeably better?

John

[Josh-H]

The answer is - it depends. If you are using the new MKII extender with the new MKII big glass then there is a slight improvement as the two were optimised to work together. How slight? Slight enough that I couldn't justify it.

[Brian Hirschfeld]

IMHO if you can, newer is better generally, especially in digital even if the difference is slight, its a nice bit confidence to having knowing your a shooting with equipment which won't detract from image quality, so that you can just focus on making the image instead of the technical side when you are out shooting, and leave the technical side for when your in front of the computer on LuLa  
And thats more my commentary on new equipment then your specific question. I recently used the 1.4 II with a 300mm f/4 (canon obviously) on a trip, and it seemed to work nicely with that though, can't imagine it can get much better, but still can't hurt right? unless you find the III is worse on whatever lens / application you are using it for

[marcmccalmont]

If the edges are important then yes if wildlife with the subject in the center no
Marc

[francois]

You might want to rent the new version(s) and see for yourself whether it's worth the price or not. Lens Rentals offers both 1.4x and 2.0x extenders (here).