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A very useful addition for Canon owners who use 'L' series lenses. I'll stand corrected, but I believe this extender will only work with 'L' series rather than than standard Canon lenses, and even then not all 'L' lenses. To make sure it's suitable for your needs it would be best to check the compatibility on the Canon website. All of that said this is brilliant piece of kit which works particularly well with lenses which have a large aperture, a 70-200mm f2.8 L for example. With any extender you are going to lose at least one stop of light entering the lens, so in my example the 70-200 would in effect become an f4 lens rather than f2.8. The 'big brother' to the 1.4x is the 2.0x, and whilst this will double the length of your lens, it will also reduce the aperture by two stops. Personally I think the 1.4x is a better compromise between lens length and aperture size. It's also worth remembering that if you use this extender in conjunction with a Canon APS-C (half frame) body you will also benefit from the 1.6 increase in magnification due to the crop sensor. A 100mm lens x 1.4 x 1.6 = 224mm. Purchased via the Canon website the 1.4x extender retails at nearly £400, hence the reason why used examples command such high prices. Buy wisely and you won't be disappointed...Read full review
Verified purchase: Yes | Condition: Pre-owned
I’ve been using this on my Canon EF 100-400mm L and it has given me that little bit of extra reach I was missing and yet the quality is still good. A perfect compliment for all my F2.8 L lens family too. No looking back now.
Verified purchase: Yes | Condition: Pre-owned
For the Mk1 version. Used on my Sigma 150-600 sport is produces very acceptable image quality, with only a very hind of softness added. Auto focus works OK too but a bit slow and need lots of light. Will not work on a lot of the lenses such as EFS range. Won't AF on the 100-400L.
Verified purchase: Yes | Condition: Pre-owned
The 1.4x extender is build to the same quality as the L lenses. Very good weather sealing . Works very well with the Canon 100-400 USM II lens without much degradation in IQ.
Verified purchase: Yes | Condition: New
Great price, great product. Works well on my Canon EOS C200 with no significant loss of quality.
Verified purchase: Yes | Condition: New
