I received my new Canon Extender 1.4X III last week. I haven’t got much time to test it thouroughly, but here are my first impressions:
The version on the left is the new Version III and on the right is version II. They are of the same dimension and have about the same weight, but the version III has some distinct physical external caracteristics such as a bigger lock button and 7 screws on the camera mount side instead of only 4 on the old version II.
Version III has also a more round shape.. I won’t talk about the lens composition since Canon does that job great in their specs.
My first test is in diffuse light (grey sky) with the Canon 70-200 f/2.8L IS II, on tripod, ISO 400, and f/2.8
The following is the original shot and focus had been made on the straw that goes over the puppet nose. This shot and the first crops are without sharpening.
Version II crop 100%
Version III Crop 100%
With the version III, I observe a better resolution (sharpness/contrast) compared to version II.
Then adding sharpening on the shots and comparing again:
V.II + Sharpening
After sharpening, the difference seems smaller in term of sharpness/contrast, but I still see a small difference in favor of the new extender.
At this time:
We will have to admit that if someone is only doing magazine pictures or 8X10 or pictures for the Web, the new extender won’t be an asset in terms of added sharpness.
But for someone doing large format like 12x18 and +, the new extender will be a plus.
We will also take note that the version III does not add speed to focus and Canon is pretty clear on that. They will be faster with the new super teles version II that will be introduced in 2011 and 2012.
If I have some more spare time in the coming days, I shall do some test with the 300mm f/2.8L IS.
Best of light