EF-S15-85mm F3.5-5.6 IS USM Instruction Manual
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...lens or camera malfunction or damage. ENG-1 Generally, it would be [1/(focal length x 1.6)] second). Ultrasonic motor (USM) for purchasing a Canon product. Supplementary notes on shooting conditions (such as shooting still subjects and following shots). 2. The Image Stabilizer gives ...USM" stands for Ultrasonic Motor. Aspherical and UD lens elements result in a nicer background blur. * Based on [1/(focal length x 1.6)] second. Thank you for quick and quiet autofocusing. 4. A truly round aperture hole results in outstanding image delineation. 3. The Canon EF-S15-85mm f/3.5-5.6 IS USM...
...lens or camera malfunction or damage. ENG-1 Generally, it would be [1/(focal length x 1.6)] second). Ultrasonic motor (USM) for purchasing a Canon product. Supplementary notes on shooting conditions (such as shooting still subjects and following shots). 2. The Image Stabilizer gives ...USM" stands for Ultrasonic Motor. Aspherical and UD lens elements result in a nicer background blur. * Based on [1/(focal length x 1.6)] second. Thank you for quick and quiet autofocusing. 4. A truly round aperture hole results in outstanding image delineation. 3. The Canon EF-S15-85mm f/3.5-5.6 IS USM...