Key Features
- EF Mount Teleconverter
- 1.4x Magnification Factor
- Microcomputer Controlled
- Communication Between Lens & Camera
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Top customer reviews
- I get very sharp images!I resisted buying one because of not so hot reviews. Then I learned that pros use them and attribute problems to user error. So, I bought one. I use it mainly for shooting birds with a 5D IV and 100-400 IS II. I have also used it with a 77D. Bear in mind the longer focal length will require a steadier hold and/or higher shutter speed. Autofocus can struggle in low contrast situations. My results improved when I practiced steady holds. The photo below was shot at f/11 & 1/500 handheld. It's also been cropped at least 80%.
- Perfect Compliment to 135LI am using this 2X extender with my 135L, and I must say that after a little micro adjustment of +5, this is incredible! I now have a 270mm f/4 lens, and the images are very, very nice. Wide open (f/4), there is a little softness or dreamy effect, but stopped down to f/5.6, images are extremely sharp and contrasty. Yes, this will enhance any flaw in your lens, but with higher quality lenses, should not be much of an issue. AF is fast, I have not had any problems with its speed or accuracy. Overall, I am extremely pleased with this extender.
- wrong toolAuto focus will not work with Canon 70D and Canon100-400 f.4-f.56 - f stop loss is too much for it to handle. Would have been nice to know requirements before purchase. I have returned for refund.
- Great ProductI use the 70-200 F2.8 ISII which is a versatile lens. This gives me another level of versatility and coupled with the 5DMKIII, I still have plenty of light. This is a great option until I can decide on whether the EF 200-400mm f/4L IS USM with the built-in Extender or the 500mm will be my next lens.
- Outstanding additionWorks great on my 500 f4 ii lens. Minor IQ loss, well worth it for the added reach.