Anyone have some experience with this?

Registered: Aug 08, 2012
Total Posts: 62
Country: United States

I was looking to buy a 1.4 extender for my lens/camera (I owns the T2i, 70-200 2.8 IS, and I get to use my schools 7D almost every weekend. I am the "adoptive father.") I was looking at the Canon ones, but they are too expensive for me. But I came across the Kenko Pro 300, which is only $250. Not only that, but if the lens/converter combo is above f8, not only can it autofocus with no reduction in speed, but also you can still select different points! I would probably get it for Christmas (just recently got the 430 EX II and am in debt to my parents). Does anyone have experience with both the Canon and Kenko?

Registered: Mar 22, 2006
Total Posts: 836
Country: Canada

My guess is that you're going to find that Canon glass is always sharper than off-brand. Why not go for a first or second generation used 1.4x from Canon? You should be able to pick up a good one used for $250.

Registered: Feb 08, 2009
Total Posts: 233
Country: United States

I bought a refurbished Canon 1.4 from my local camera shop, no regrets!

Registered: Jan 17, 2012
Total Posts: 146
Country: N/A

I just picked up a 1.4x II for 230 here. I'm almost positive you'll be happier with the canon as opposed to the kenko pro 300.

Registered: Apr 26, 2005
Total Posts: 1044
Country: Canada

My biggest concern with the Kenko isn't the glass, it's the plastic body construction. It may be strong enough to support a 70-200mm f/2.8 but if you ever upgraded to anything bigger I have serious doubts and may even damage your camera mount over time with the lens you have.

I would use the Kenko with something like a Canon 55-250mm plastic body lens or something like that. With an L I wouldn't use anything less than the Canon TC.

Registered: Oct 24, 2008
Total Posts: 69
Country: United States

I recently purchased the Kenko 1.4x Pro 300 DGX for Nikon and couldn't be happier. Using it with the 70-200 VR1 and have not seen any IQ of focus issues. Hopefully Trenchmonkey ses this since he has a great deal more experience using the Kenkos. Also, take a look at Kea Photo and pick one up brand new for less than $175.


P Alesse
Registered: Dec 25, 2004
Total Posts: 11951
Country: United States

What are you shooting? Any low light situations?

Registered: Jun 04, 2011
Total Posts: 1768
Country: United States

One other thing to point out. You likely won't have much luck getting the 7D to AF at the F8 level, even with the pin tape trick. I have the Kenko 2x and thought it was quite decent. It did have CA when shooting backlit images.


Registered: Aug 08, 2012
Total Posts: 62
Country: United States

Hello everyone, and thank you. I actually forgot I posted here! I shoot almost everything (football, soccer, basketball, baseball, ect so yes, mostly low light) I use a monopod for my 70-200 if that means anything. I heard in some instances that it actually was slightly sharper and faster for AF than Canon. Anyone with experience?