Which converter is best with the Canon EF 300mm f/4 L IS?

[websurfer]

Which converter is best with the Canon EF 300mm f/4 L IS? cos I have seen some very different results: some bads and some excellent shots with TC on the EF 300 f/4 IS?

Its very difficult to find out which TC is used in the different cases. Information given: 1.4x TC.

Is Canon the best TC for this lens? I have also gotten the information that this lens dosn´t take TC´s so well? is this true?

[august23]

That'll give you some reach. I've got no clue about TC's, but I'm getting interested. On a crop camera, the 300mm will give you a total of 672mm reach! DAMN! On a 200mm it'll give you a grand total of 448mm, which ain't too shabby either!

I think Kenko is the way to go with TC's. I'm curious myself to hear the answer.

[puttick]

My 300m f4 L IS works superbly with the 1.4x Canon converter, on my 5D.

[Woolburr]

I've used both the Canon and the Tamron SP Pro converters on my 300 f/4....I've had sharp results with both brands at 1.4 and 2x....The only thing you have to remember is that unless you have a 1 series body, you will lose auto-focus with a 2x TC because the lens now becomes f/8...the 1.4x will work fine on any Canon body though, as that only makes it an f/5.6 lens.

[Big WIll]

Canon versions are the best
Then it seems Kenko Pro 300 models are second best at a good price.
I just purchased a Kenko Pro 300 1.4x for my 70-200mm F2.8L

These Threads may tell you something...
Q about Canon EF 1.4x II and Kenko 1.4x Pro 300 converters (http://www.photography-on-the.net/forum/showthread.php?t=278269)

Which Option 70-200mm F2.8L + 1.4x or 300mm f4L (http://www.photography-on-the.net/forum/showthread.php?t=276500)

[websurfer]

OK - thanks.
I don´t think a 2x TC will be actual, as I think IQ will suffer too much.

[DaveL]

I had excellent luck with the 300 f/4L and a sigma 1.4 EX DG
which if you keep your eyes open can be found pretty cheap used