I photograph minor league baseball and this allows closeups of the outfield or field shots from the upper level coupled to my 70-200 L series lens. I am not a professional and use of this lens allows great reproduction for families, players and fans.

High Quality; Well Made

Heavy

I love this extender. Its a bit expensive, probably Canon Extender EF 2X II is most logical to get. I did not own previous extender so I cannot compare them. This is my first extender, works like a charm, love it.

Durable; Easily Interchangeable; Quality; Strong Construction

Expensive; Heavy; Inconvinience

good add on for F2.8 lens. Focusing is slow but end result is sharp. I am using on my Ef200mm f2.8 lens.

Durable; Easy To Use; Reliable

Bulky

Fantastic replacement to an expensive lens but the lens is expensive for a good reason. In almost every camera, the auto focus stops working with the 2xiii. So unless your eyesight is 6/6 unlike mine, chances are that not every shot you take will be sharp. With a loss of a couple of f stops too.

Outstanding images with this in conjunction with my 300mmF2.8L. Frustrating that it does not work with the 100-400 F4.5L ll USM, while it did work with the original version of this lens, (although this was not consistent). I also own the 1.4x extender.

Very.co.uk said delivery would be about 6 weeks, but this arrived within a week, so very impressed by this. I attach this to my 70-200mm f2.8 is 2 lens to get 400mm and the quality surpasses expectations, considering I would have to pay two grand for a 400mm lens outright.

I haven't used this much to speak of, but after seeing this review, I thought I would give it another try. The examples are close with the Extender. I like it and definitely need to use it more to see if I can use better settings. Also I use it on my 80D camera.

ok I've given this a few tries now. I know that you can't use this extender with the aperture wide open. Despite trying various settings I've found getting a clear image from it very difficult, you need to up the aperture to have half a chance, which results in having to up the iso even on the...

Not much really

A bit of a nuisance to keep putting in on - and then you have to focus manually; which resulted quite often in poor quality photos

I have a hard time getting good shots when mounted to my canon 70-200 f2.8 mkII. Was hoping for more.