The 2x EX is placed in the same way and it allows the photographer to use the 70-200mm f/2.8 lens as a 140-400mm f/5.6 telephoto zoom lens, and the 300mm f/2.8 lens as a 600mm f/5.6 ultra telephoto lens.
Lens construction: 6 elements in 5 groups
Focal length: 2x that of a master lens
Aperture coupling range: F2.8 - F32
Reproduction ratio : 2x that of a master lens
Dimensions : 68.5 X 52mm
Weight : 234g (8.3oz.)
SRP : £199.99
Would you recommend the product? No |
Price you paid?: £159.00
| Rating: 4
heavy and extra physical length gain
Ok so it doubles your lens length but you do loose two stops which can mean that you will also loose the auto focus leaving you with fiddly job of trying manually focus.
I have teamed this with my Sigma 70-200 giving 400mm @ f5.6 but have I have to say that using this setup for a full day of motorsport does get a bit heavy after a while, however you get a useful 400mm lens. I've also tried the trick of using both this and the 1.4 TC which does work but makes things rather unsteady and trying to manual focus while hand holding is a bit of a handful! This is something that Sigma does not recommend oddly enough.
If you're looking for a TC then go for the 1.4 before thinking about this one as you'll find the 1.4 more flexible and most of the time it will keep you under the f5.6 auto focus limit.