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Canon 40D AF Test with Canon 100-400 and Kenko 1.4X Teleconv

For the Love of the Dog Video Site
For the Love of the Dog Video Site For the Love of the Dog Video Site
For the Love of the Dog Video Site

Some say the Canon 40D will not AF with their f/5.6 lens and a teleconverter. *My* 40D does work with *my* Canon 100-400 lens at 400mm f/5.6 and *my* Kenko 1.4X teleconverter. The shop demo 40D also worked with my lens and teleconverter, which is why I proceeded with my purchase.Some people are not as fortunate. They find their f/5.6 lens does not work with a 1.4X teleconverter and the 40D, although their optics may work with their older 20D or 30D. I have no explanation for this but remind people that Canon explicitly disable AF on their consumer line of cameras when fitted with lenses/optics slower than f/5.6. I've used the standard trick of taping the pins on my teleconverter in order to hide the presence of the teleconverter from the camera body.There is no doubt that the AF performance with the teleconverter is not as good as without, but with reasonable expectations, good light and contrast it does work (for me). However, I would only use the teleconverter as a last reort if I simply had to have the reach. Results are far more satisfying without it.I'm afraid the start of the video has been lost as my camcorder was playing up and as my video editing software was also playing games there is a bit of an old wedding stuck on the end, but the video contains all you need to know in order to see that the 40D, 100-400, Kenko 1.4X combo works (for me).

Channel: Entertainment
Uploaded: November 30, 1999 at 12:00 am
Author: eezytiger

Length: 01:45
Rating: 4.48
Views: 26518

Tags: 1.4X  2.0X  2X  40D  AF  autofocus  canon  extender  focus  kenko  teleconverter  

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Video Comments

bluetsunami (November 30, 1999 at 12:00 am)
That 1 lens is a Super Telephoto lens! Its made for Professional Photography but sometimes us hobbyist can't help ourselves ;_;
raimundo27 (November 30, 1999 at 12:00 am)
The Canon Lens 100-400 EF f/4.5-5.6L IS USM together is the perfect combination for me - a novice sports photographer.I can buy the two for under Aus$3000 and get great sports action shots.
ryanracca (November 30, 1999 at 12:00 am)
You should see the largest lens of Sigmaman, they're expensive as hell
scaredweepel (November 30, 1999 at 12:00 am)
in pounds it'll be £1700 or even cheaper! But that's a lot of money to be spend on photos of electric pylons.
xelaeel (November 30, 1999 at 12:00 am)
huh .... 100-400mm + 40D does not equal to 7000! it's 4000 at most! the cheapest price for the combo is 3000 ... and once u'r into photography ... u drool for lenses !
prisonbreakmegafan (November 30, 1999 at 12:00 am)
cause you're not a photo-freak like me :)
navymmw (November 30, 1999 at 12:00 am)
lol, I know. You could get your PPL for that price!
QuicksilverRZ (November 30, 1999 at 12:00 am)
i dont see how someone can drop over $7,000 for a camera and 1 lens. insane
dodd9999 (November 30, 1999 at 12:00 am)
True. To be honest it did not occur to me. I'd only had the camera for about 10 days so it wasn't a natural thought to use LV. The advantage with the view through the viewfinder is that you can see the speed of the AF. All you'd get with LV is a black screen while AF was finding the target. If the lens was hunting or struggling you would never see that with LV.
BONDzer007 (November 30, 1999 at 12:00 am)
you know u could have used live view

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