[Guest]

From what I've read this lens is better than the panasoic but not quite as good but in practice on par with the canon 100-400 ii (close). The biggest negative is size and price. Dont' actually own the lens (or any of these lenses - just based off of what I've read). Some of this is from the lenstip review among others. To be honest I can't see how the panasonic lens would work well at the long end given the max aperture.