Canon 4410B002

I bought mine several years ago and never got chance to use it. I just got a new camera and wanted to try it, but I am so disappointed, the autofocus doesn't work at all when used with EF100-400mm f/4.5-5.6 L IS USM on 5ds r.

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....

This extender when paired with a high optical quality lens can yield sharpness very close to one of the long primes. I've paired it with the 300mm F2.8L IS II lens and a 7d mark II body to get almost 1000mm at f5.6. Image sharpness is very close to...

In wildlife photography, one seldom sees a distant object of interest filling the entire frame. Therefore, options to improve the picture often include: 1. cropping to the desired object size, or 2. using a longer lens, or 3. using an extender with a...

I 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...

Auto focus does not work with the 2x-III extender on most Canon cameras. Nothing on the product specs or description documents this shortcoming. Auto focus works in LiveView only on my 6D/100-400 combo, but it is way too slow to be useful at all. I...

I have only used it a few times. It has delivered as expected. I just doubled my focal length from 200mm to 400mm.

I have only used it a few times. It has delivered as expected. I just doubled my focal length from 200mm to 400mm.

I just love my exstender with my 60d and 2.8 70 / 200 is 11 lense

I just love my exstender with my 60d and 2.8 70 / 200 is 11 lense