An interesting comparison of lenses...

[ameerat42]

This might be an interesting link to keep:

From LENSRENTALS (http://www.lensrentals.com/blog)

Am.

[Morgo]

Shame they didn't include the Sigma 120-300 f2.8 sport. It would have been interesting to see how that compared.

[ameerat42]

Hmm! Had a bit of a hunt. Not easy to search for specific lenses!!

You could perhaps ask here (http://www.lensrentals.com/contact)??

[swifty]

In the comments section Roger answers the question regarding the 120-300/2.8. It is too heavy for their bench apparently.
Damn... how I wish I could get my hands on the 200 f2.

[ameerat42]

Wow! That sounds like Big Bertha from WW!!!