Focal Length: 50mmMaximum Aperture: f/1.4 (creates a very shallow depth of field)Minimum Aperture: f/22Lens Construction: 7 elements in 6 groupsAperture Blades: 8 rounded blades for smooth bokehClosest Focus Distance: 0.45m / 1.5 feetFilter Size: 58mmAutofocus Motor: Micro USM (Ultrasonic) with full-time manual overrideDimensions: \(\approx 73.8 \times 50.5\text{ mm}\) (Diameter \(\times \) Length)