The Canon EF 300mm f/4 USM L is the predecessor of the current 300mm f/4 IS version. During its time it was and still is a highly regarded lens and it remains a well sought-after lens on the used market. For a review goto http://www.photozone.de/canon-eos/171-canon-ef-300mm-f4-usm-l-test-report--review. More photos can be found at the Singapore Airshow 2010 gallery https://pbase.com/robin_singapore/singapore_airshow_2010 as well as the Singapore Chingay Parade 2009 gallery https://pbase.com/robin_singapore/singapore_chingay_parade_2009.