Quote:
Originally Posted by Leif
Teleconverters tend to work better with some focal lengths and some lenses than others. I suspect the Canon ones are optimised for use with long lenses, and that the 200mm lens is ill matched. That is consistent with the fantastic results Andy (and others) get with a TC and a 600mm lens. Nikon even had two teleconverters, one for long lenses, and the other for not so long lenses.
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I regularly work with a TC14E on my Nikon 500 f4 AFS and can honestly say I can't tell the difference. I'm sure Leif is right, some converters only work well with specific lenses, on the other hand I have a Tamron 1.4 that seems to work well on my Tokina 150-500 f5.6 ATX, my Tokina 80-400 ATX and on my Tamron 90mm Macro. I think if you push the boat out and use a 2X converter on any lens, then you are going to have to except lower quality results. Having said that, if it's the only way you can obtain the shot, then the result is as good as it gets!
nirofo.