Re: samyang 85mm 1.4
 

Went for the samyang 85mm 1.4 lens instead,, woooooow excellent piece of kit, practicing with it at the moment, excellent focal distance... if the priest wont let me move i will have to argue with him hehe!! Anyone got the lens?? obviously its manual so got to keep adjusting the exposure wheel or shutter speed but want to keep it at 50 so any tips for me for the video side of things whilst in manual??steve

Re: longer zoom or prime
 

Interesting. I though all 2x teleconverters lost you 2 stops, meaning you would go from f/2 to f/4. Are you referring to the Canon 2x II? As far as I know there's a 2 stop loss on that one.

Re: longer zoom or prime
 

Yep. It's f/4 with the 2x and f/2.8 with the 1.4x.

I've got the EF 200/2.8L II. Stunning lens. No IS. It accepts the extenders. The 2x softens the image a bit and the focus is slower at f/5.6, but it's fun to have that reach. Mostly, I like using it without the extender.

For narrative video, I think the 135/2L is more useful. You can get an f/2 or better set from 135 down to 24mm. For events and sports, the 200/2.8L is the better choice. These lenses use similar designs, like a big and little brother.

Re: longer zoom or prime
 

Absolutely correct. Sorry, that was my typo. As I just mentioned in another reply I have just been using the 2X teleconverter with a 70-200mm F/2.8L & 3X crop mode on my 600D which gives me the equivalent of a 1200mm F/5.6 or a 1920mm lens on a 5DII. Amazingly good images.