Canon Fit Teleconverters

RichardA

RichardA

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I've been looking at buying a teleconverter to use with my 450D and have been looking at the following the kenko pro 1.4x, kenko 1.5x and canon 1.4x teleconverters.

I cant seem to find much comparing the optical quality of the three, is the canon better as it costs alot more. Why is the 1.5x kenko half the price of the 1.4x?

I believe the canon will AF upto F/5.6, will the kenko focus at higher apertures?

And do the kenko teleconverters fit all lenses, including sigma ones? I dont own any yet, but am considering a sigma prime macro lens in the future.

Thanks for your help.
 
Its out of stock, but will it work on a canon 70-200 F4?
 
I have the Kenco 1.4 and the Canon 1.4

The kenco fits my Sigma and all my canon and Tamron lenses

The cannon only fits one of my two canon lenses and neither the sigma or the tamron lenses

The image quality is much the same.
 
Canon bodies (with the exception of the 1D series) will only Af up to f5.6, nothing to do with the converter. If you put a 1.4x Canon on a 100-400L it will still not AF.

The Canon 1.4x will only fit L lenses above 135mm.

So, unless you have some suitable L glass I would get the Kenko 1.4 pro.
 
Thanks guys. If the image quality is the same I think I'll get the kenko pro one and save some money.

Whats the difference with the 1.5x kenko teleconverter, is the image quality worse?
 
I'm not sure but the pins may be different on that, I seem to remember a friend telling me he could retain AF with it.

I could well be completly wrong mind.

I would go with Kenco 1.4 pro as you suggest.
 
Kenko Pro 300 is generally regarded as the best all-rounder, and very nearly as good optically as the Canon jobbie. Kenko 1.5x is optically, erm, horrible.

The Kenko 1.4x is better IMHO because it fits more lenses, like the EF 100mm Macro. Just to clarify the 'fit' thing, of course the mount is the same but the Canon Extender has a big front portion which protrudes inside the body of the mother lens. On many lenses, there's just no room for it.

And the disabled focusing issue when the f/number is smaller (higher f/number) than f/5.6 (when used on Canon non-1D bodies). It's not a 'light' problem as commonly supposed, it's the physical diameter of the aperture that the AF sensors 'see'. With the extender attached this is reduced and just too small for the phase-detect AF to function properly. So even if you do the 'taped pins' trick to fool the camera into thinking the extender isn't there and so bringing the f/number into the f/5.6 range, it still won't work properly. It might try, but it's friggin useless and hunts back and forth in a hopeless quest to lock onto something which the extender has ensured it cannot find :eek: So save your time with that old wive's tale ;)

Richard.
 
Old thread revival, but has anyone tried the Tamron 1.4 teleconverter?

Have found a couple of places that suggest it is better than the Kenco and much cheaper still but rather rare
 
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