Like the Sigma 150-500 over the Canon 100-400 for the extra 100mm and the good OS
Like the Canon over the Sigma for the build quality, rather like the push-pull zoom action (but the barrel lock can fail - but then the Sigma only has a lock when unextended)
I've had better results with the Sigma than the Canon
Quote:
Originally Posted by nick_gray
The Canon 1.4x and 2x extenders will only work with L series telephoto or telephoto zoom lenses, so if going this route, be careful which lens you buy. See here for a compatibility chart. I think you also lose a couple of stops, so they are only useful in good light conditions. |
You could always use a Kenko TC which'll fit most lenses and is of equal quality of output to the Type II Canon (the Type III is considerably better!). I had a Canon 1.4x II and binned it for the Kenko 1.4x Pro300 (sold the Canon for 3 x what I paid for the Kenko). I use the 1.4x as the IQ dropoff isn't too bad, whereas the 2x would be too much for me - and I only lose 1 stop vs the 2 stops with the 2x
Be aware that adding a TC which makes the aperture of the lens f/8 (like on a 100-400 @ f/5.6) will prevent AF on most Canon cameras (unless you use the pin tape trick)
Quote:
Originally Posted by nick_gray
Looking at the reviews of the lenses, already mentioned by others, on the Warehouse Express site (WEX): The Sigma 150-500 seems to get fairly mixed reviews, from 14 reviewers, the Sigma 50-500 only has a couple of reviews, so is difficult to judge, the Canon 100-400 seems to be generally liked by all 26 reviewers, it's also on the extender compatibility chart, if you did want to go even longer!!  |
Don't forget there're 2 x Sigma 50-500s now: the original Bigma and the newer OS version - the OS version is very well rated and would appear to outperform the 150-500