Extenders 2x TC question with RF 100-500mm

[lostnomore]

I realize that the RF 2x teleconverter can be only used on this lens from 300-500mm. What is the max. (widest) aperture at 300mm and also at 500mm when this TC is attached?

 

[Only RF]

If you scroll around it shows some specs

Canon Extenders | get more reach with a teleconverter

Extender is Canon's name for a teleconverter and increase your lens' focal length, but which lenses are compatible with Canon Extenders?

www.eos-magazine.com

 

[Kamoshika]

I realize that the RF 2x teleconverter can be only used on this lens from 300-500mm. What is the max. (widest) aperture at 300mm and also at 500mm when this TC is attached?

From this thread:

"100-500 with extenders becomes:

420-700mm f/8-10 L IS with 1.4x

600-1,000mm f/11-14 L IS with 2.0x"

 

[lostnomore]

Perfect, thanks for your replies. I've read that the 2x isn't quite as sharp as having the 1.4x attached. Any thoughts?

 

[Only RF]

That is what I read as well but I can't back that up. I know I decided I would not put the 2X on that lens. I only have the 1.4 and I decided cropping would do the rest.

 

[AKVet]

That is what I read as well but I can't back that up. I know I decided I would not put the 2X on that lens. I only have the 1.4 and I decided cropping would do the rest.

Same with me. I completely agree.

 

[Only RF]

Do already have a 1.4?

 

[Jake Shoots Birds]

I have the 100-500mm and both the 1.4x and 2x TC's. I just went back through my Lr catalog and to my astonishment I don't have a single shot with the combination of the 100-500mm and 2x. That could be for a variety of reasons, but the one suspect by omission is that I never got anything worth keeping.

That said, I may need to make it a priority to test out the combinations against a static target in the next couple days.

 

[RedCobra]

Perfect, thanks for your replies. I've read that the 2x isn't quite as sharp as having the 1.4x attached. Any thoughts?

I can verify this. I have both.

 

[MikeZ]

I have neither the lens nor either of the extenders, but I recall reading somewhere that due to the physics/optics involved all 1.4x converters out-perform 2x converters. I wish I could remember the details or where I read that bit, but sadly I don't.