11-11-2010, 10:03 AM
There's no such thing as a IS USM III.
Canon has 3x 70-300 IS lenses.
These two:
http://www.opticallimits.com/canon-eos/2...rt--review
http://www.opticallimits.com/canon-eos/2...rt--review
Plus the new L IS.
Canon has 3x 70-300 IS lenses.
These two:
http://www.opticallimits.com/canon-eos/2...rt--review
http://www.opticallimits.com/canon-eos/2...rt--review
Plus the new L IS.