[bugdog]

I am considering buying a Canon Zoom Lens.
70 -200L f2.8 is



It will be £1000 plus.What frightens me is getting a so called "bad copy"
What is the best way to avoid this .Can you road test the lens before you buy
or do you buy a sub standard lens and go through all the grief of exchanging the
unit trying to prove to the retailer that it is the lens and not your bad technique.
I came across someone on another forum that had bought a 600mm canon lens
and it was hopeless.He spent months of heartache trying to get a replacement
.I think in the end he went direct to Canon in Japan .He had been buying Canon since the mid 1970's so i think his experience could not be questioned.
The lens in question he had was approx £6000.

Any advice or suggestions will be welcomed.