Canon EF 100-300mm f/5.6L - Canon EF Mount

The Canon EF 100-300mm f/5.6L is a classic telephoto zoom featuring a push-pull design and professional L-series optics. It incorporates fluorite and ultra-low dispersion elements to minimise chromatic aberrations, a significant feat for its era. Despite lacking an Ultrasonic Motor, it remains appreciated for its lightweight build and optical sharpness, particularly at the long end of the zoom range. When purchasing a used example, check the push-pull zoom mechanism for excessive 'zoom creep' or gritty movement. The early AFD (Arc Form Drive) motor is noisier and slower than modern equivalents, so ensure the autofocus locks correctly. SDS technicians inspect the internal elements for the haze or fungus that can sometimes affect these older L-series lenses.