I have been trying to work out for the last few weeks if the Kenko converter ($229) is as good as the Canon ($479). With $250 price difference I thought I would take a set of sample images in a controlled environment to directly compare the two.

Check out the results;

N.B: I am in no way affiliated with either of these companies.

The following is a set of images shot using the Canon 300mm f/2.8 L IS USM Lens to compare quality of 1.4X converters both Kenko and Canon.

All images taken from tripod with IS enabled, ISO800 and 1/400th in RAW.

300mm f/2.8

300mm f/2.8 – 100% Crop

300mm f/4

300mm f/4 – 100% Crop

300mm f/5.6

300mm f/5.6 – 100% Crop

420mm f/4 – Kenko TC

420mm f/4 – Kenko TC – 100% Crop

420mm f/5.6 – Kenko TC

420mm f/5.6 – Kenko TC – 100% Crop

420mm f/4 – Canon TC

420mm f/4 – Canon TC – 100% Crop

420mm f/5.6 – Canon TC

420mm f/5.6 – Canon TC – 100% Crop