REQ: difference between Canon 1.4x and 1.4x II

[marcel32us]

I use a Canon 1.4x on my 70-200 2.8L, and only after I puchased it (used), I noticed that there's a 1.4x II available.

What's the difference (there'll probably be one) and would it be worth to upgrade? Can't find anything on this on the net, but I'm probably not looking in the right places

Marcel

[marcel32us]

And minutes after that I found an answer on Canon's own site:

The new version II maintains the outstanding optics of the previous version, and adds enhanced weather-resistant construction, and improved anti-reflective surfaces in the barrel.

So far no reason for me to upgrade, since my zoomlens ain't water resistant anyway.

Anyone care to comment on this?

[bramos]

For owners of the 2.0x extender, an upgrade might be a good idea. Contrary to the 1.4x II, the 2.0x II has improved optics over the type I version.

[Maurice]

AFAIK the type II cooperates better with the IS versions of the white lenses. So if you use an IS variant of your 70-200/2.8 the 1.4 II would be recommended.

[Hopla]

I use the Canon EF 70-200mm f/4.0 L USM in combination with EOS400D. Do you think that I can use the "Canon EF 2.0x Extender II" converter?

[brno]

I use the Canon EF 70-200mm f/4.0 L USM in combination with EOS400D. Do you think that I can use the "Canon EF 2.0x Extender II" converter?

With aperture f8 you lose your AF with your 400D. Than you have only MF.
IQ is more worse than with 1.4 extender.

[Wildpicture]

The Canon 1.4x and 1.4xII converters are optically identical. The only differences are that the second version has a small silicon O-ring to prevent moisture getting into the converter and other paint is used on the inner metal tube to further limit any reflections. So practically there are no real life differences and because they are identical optically, there is of course absolutely no difference in optical performance.

With the Canon 2x and 2xII there are differences. The second version is a completely different optical design and it does perform much better. Especially with the "big white IS-lenses". I have tested both versions (mainly on 300/2.8L and 500/4L lenses) and the difference is noticeable. The second version also performs better with older white L-lenses.