Canon 1.4x extender

[Morph]

I was wondering if anyone had used one on a 70-200mm F4.0 L lens. How is it for quality?
Regards Neil

[EdBray]

I will use one on my 70-200L f2.8 IS, and I used one occasionally on my 70-200L f4 IS before I sold it. IQ is very good, also used it on my 100-400L and was impressed by the results.

See Here (http://www.talkphotography.co.uk/forums/showthread.php?t=73799) Post 10

[markta]

I've used this combo.

Erm...it's pretty good, not excellent or poor but somewhere in between. Still pretty sharp and I could still get decent shutter speeds in good to average daytime light.

[Crazyhorse]

Hi

I've got the 70-200mm F4.0 L plus 1.4x and am very impressed.

Lisa

[rpcrowe]

I use the 1.4x TC on both my 70-200mm f/4L IS and 300mm f/4L IS lenses and it provides quite good results.

The 70-200mm is turned into a 280mm lens with an f/5.6 aperture. The 300mm is turned into a 420mm f/5.6 lens.

While the A/F and image quality is very good; the 300mm f/4L IS used alone beats the 70-200mm f/4L IS + 1.4x TC in both A/F and image quality.

The 400mm f/5.6L lens beats the 300mm f/4L IS + 1.4x in A/F and image quality.

However, the margins with which these two lenses wearing TC's beat the bare lenses is not very large. I am very happy with the results of the 1.4x TC on either of these lenses. if I were not happy with the results, I would have sold the 1.4x TC a long time ago.

I am so confident of the 300mm + TC performance that I left my 400mm lens at home and carried the 300mm + TC on an Alaska trip. Unfortunately, the weather was so bloody bad on that trip that I did not use the combination at all.

[Matty777]

I have the cheaper 1.4 Kenko Teleplus Pro 300 version on my 70-200 f4. I have not been dissappointed, espeically at the less than half Canon price!