It's not the most current of lenses, but the optics on this thing as far as I can gather would give modern equivalents a serious run for their money. The USM (ultrasonic motor) is neither here nor there in this day and age, since it could still be considered as noisy when put against the SEL 18-55 mm which is virtually silent whilst working the auto focus. But since I was using the canon 35-135 mm in full manual mode there wasn't any motor noise to be bothered by. My full verdict on this lens for manual use here.