- Aug 16, 2012
It's an interesting lens. I'd like to try it out. From the various reviews, it seems to be optimised for 600mm and is sharper there than at 400mm, and as I would use it at 600mm I prefer it that way. Each year I get older, I need a lighter lens unfortunately, and I appreciate the 100-400mm more and more. The 1.4xTC works well on my Sigma. 150-600mmHi Ilko, thanks... as to comparison - the location / angle / distance were all identical (to the nearest 0.1m ) so indeed 50% more linear detail to be captured. Shooting conditions / settings were different though (high ISO on the 100-400 shot, causing some loss of contrast / detail).
My non scientific assessment after a couple of days:
100-400mm II can achieve the best detail / sharpness - if you can get close enough for good framing
60-600mm comes quite close in sharpness and contrast while adding reach for tight framing - if you can handle the weight or work from a tripod / monopod (the additional kilo of weight, way in front of the camera, makes itself felt...)
100-400 II + 1.4xTC III (so 560mm f/8) lags behind a bit in contrast / sharpness (all on my 7DmkII)
So this new lens will be used on occasions reserved for photography, where I know I'll need tightest possible framing (or need the massive flexibility in framing of the 10x zoom). When hiking "with the possibility of capturing a nice shot" I'm using the 100-400 for its lower weight, easier handling and excellent quality.
P.S. I'll try the 60-600 + 1.4xTC for the 840mm reach while on holiday - see what result I can get with that (on crop body so >1200mm equivalent )