Comparison of Canon EF 70-300mm f/4.5-5.6 DO IS USM and EF 75-300mm f/4-5.6 III USM with Canon D-60

These photographs demonstrate lens performance under outside ambient light. Slightly better contrast, color, and image detail were obtained with the EF 70-300mm f/4.5-5.6 DO IS USM lens for the building and sign photographs. The water hyacinth image has significant lighting variations between exposures, and the water hyacinth was moving with variable slight wave action off the lake (making comparison in image sharpness difficult). Images were enlarged to 10x15 inch tifs from RAW files prior to being cropped to show details of the images and converted to jpgs.

70-75mm
Near Full Frame	Mild Crop	Tighter Crop Shows better detail with EF 70-300mm f/4.5-5.6 DO IS USM lens
EF 70-300mm f/4.5-5.6 DO IS USM @ 70mm f/8 ISO 100 1/60th	EF 70-300mm f/4.5-5.6 DO IS USM @ 70mm f/8 ISO 100 1/60th	EF 70-300mm f/4.5-5.6 DO IS USM @ 70mm f/8 ISO 100 1/60th
EF 75-300mm f/4-5.6 III USM @ 75mm f/8 ISO 100 1/100th	EF 75-300mm f/4-5.6 III USM @ 75mm f/8 ISO 100 1/100th	EF 75-300mm f/4-5.6 III USM @ 75mm f/8 ISO 100 1/100th
300 mm
Full Frame	Tight Crop Shows better detail with EF 70-300mm f/4.5-5.6 DO IS USM lens	Out of Focus Background Diaphragm Pattern (background lighting different [partly cloudy day])
EF 70-300mm f/4.5-5.6 DO IS USM @ 300mm f/8 ISO 400 1/400	EF 70-300mm f/4.5-5.6 DO IS USM @ 300mm f/8 ISO 400 1/400	EF 70-300mm f/4.5-5.6 DO IS USM @ 300mm f/8 ISO 400 1/400
EF 75-300mm f/4-5.6 III USM @ 300mm f/8 ISO 400 1/500th	EF 75-300mm f/4-5.6 III USM @ 300mm f/8 ISO 400 1/500th	EF 75-300mm f/4-5.6 III USM @ 300mm f/8 ISO 400 1/500th
300mm Lighting differences make a bigger impact than lens differences in the photographs below.
Full Frame	Tight Crop
EF 70-300mm f/4.5-5.6 DO IS USM @ 300mm f/11 ISO 400 1/125	EF 70-300mm f/4.5-5.6 DO IS USM @ 300mm f/11 ISO 400 1/125
EF 75-300mm f/4-5.6 III USM @ 300mm f/11 ISO 400 1/100	EF 75-300mm f/4-5.6 III USM @ 300mm f/11 ISO 400 1/100

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