Quote Originally Posted by Colin


In my non-professional experience, unless you're actually dealing with a pixel resolution issue (which you can in some cases, though I don't know about a 5D2... teleconverters are usually worse than just cropping, but it will depend a little on the lens too. Some lenses seem to be more friendly to a teleconverter. If the pixel resolution doesn't make full use of the lens, it may very well be better to use a teleconverter.


Is that ambiguous enough?
<div style="clear: both;"]</div>


I think you're pretty much saying what I was trying to .


On older bodies, there'd have been reason to use a TC. Back in the days of the 30D when you were looking at 8MP sensors then pixelation would probably have been an issue before light degredation. But on a 21MP FF camera like the 5D2 I strongly suspect it's either roughly 50-50 or the other way round, possibly by a significant margin.