Reviews and Problems with Canon Extender EF 1 4x II
Showing 1-10 of 11
Value for money 8
Photoelectric, Photography Review
16 September 2009
Summary: Used on my 70-200 f4 IS and Canon 40D, this converter has given very good results. The trick is to use it with the 70-200 zoomed all the way out to 200. Used this way, the images are very sharp.
Pros: Lends flexibility to existing compatible lenses. Lighter than getting a dedicated long telephoto lens, great image quality.
Cons: Image quality degrades when lens is not at full telephoto - no zooming. Pricey!
Summary: The 1.4x extender is designed to provide that extra few mm of focal length when distance is the challenge. I bought it to add-on to the Canon 100-400mm zoom L series f5.6 lens and it works as the Canon spec says it should. It doesn't fit my Canon 70-300mm EF lens. Of practical importance, its use is associated with a loss of 1 stop, f5.6 to f8, and this is significant because any stop higher (higher number) than f5.6 and autofocus won't work.
Summary: Neat little way of boosting the range of your L-glass. I've actually owned the 2x Extender as well and to be honest never really got on with that. I had sharpness issues and focusing problems, which I seem to be free of with the 1.4. Attach it to a 300 f/2.8 or a 70-200 f/2.8 and you don't really loose much, if anything, especially on a tripod.
Summary: It does what it says on the box - extends the focal length by 1.4! I use it with a Canon 400D and a Canon 70-200 F4L, so it extends the range to 280 at F5.6, which isn't bad at all. You can't really tell there's extra glass in the way either, which is impressive especially given how good the Canon L lens is.
Summary: Produit de qualité professionnel pour usage avec des zooms série L principalement de chez canon. qualité de fabrication sérieuse . Je l'utilise sur un 70-200mm L IS F2.8 . une fois l'extender en place cela revient à un 90-280mm qui ouvre à F4.0 Je ne pense pas avoir découvert le maximum de cet extender sur cette série de zoom il est mal adapté à mon gout . Je pense qu'il donnerait de meilleurs résultats sur des focales fixes de 300mm ou 400mm de la même série L .