Canon EF 28-135mm f/3.5-5.6 IS USM Lens

Canon EF 28-135mm f/3.5-5.6 IS USM Lens
The Canon EF 28-135mm f/3.5-5.6 IS USM is a highly versatile, compact, and lightweight standard zoom lens designed for Canon EF-mount full-frame and APS-C DSLRs. Covering an expansive focal range from wide-angle to telephoto, this lens serves as an excellent all-purpose walkaround option for travel, snapshots, portraits, and landscapes. Engineered as one of the pioneer models to feature Canon’s Optical Image Stabilizer (IS) technology alongside a Ring-type Ultrasonic Motor (USM) for fast, silent autofocusing, it delivers a balance of practical range and steady handheld performance.

Optical Image Stabilization & Low-Light Capability
Dual-Gyro Hardware IS: Built-in hardware stabilization employs a pair of internal gyro sensors that actively detect vertical and horizontal movement. A dedicated microprocessor compensates for this motion in real-time by shifting specific internal glass elements in parallel with the perceived movement.

Handheld Slow-Shutter Advantages: The stabilization system counteracts camera shake to deliver sharp handheld images in low-light environments without requiring a harsh flash or a tripod. It provides an effective exposure gain of approximately 1.5 stops at the wide-angle end and up to 2 stops at the telephoto extension.

EMD Precision Aperture: Outfitted with an Electronic Magnetic Diaphragm (EMD) pulse control system, ensuring highly accurate, consistent aperture blade settings from shot to shot.

High-Speed USM Autofocus & Internal Mechanics
Ultrasonic Focus Motor (USM): Driven by an advanced Ultrasonic Motor that delivers lightning-fast, smooth, and near-silent autofocus tracking. This whisper-quiet performance is highly beneficial for tracking action or pulling focus without introducing mechanical motor noise during video recording.

Full-Time Manual Focus Override: Features a mechanical focusing ring that supports seamless, full-time manual focus override. This allows photographers to fine-tune focus adjustments instantly at any time, even while the camera remains locked in autofocus mode.

Stationary Internal Focusing: Designed with an internal focusing mechanism, meaning the lens barrel does not extend or rotate at the front during focus acquisition. This stationary design makes it incredibly easy to use position-sensitive specialty filters, such as circular polarizers and graduated neutral-density (ND) filters.

20″ Minimum Focus Range: Maintains a constant minimum focusing distance of just 20 inches across the entire zoom range, enabling great close-up capabilities for isolating smaller details at the 135mm telephoto end.

Technical Specifications
Focal Length Range: 28-135mm (Provides a 44.8-216mm equivalent on APS-C sensors)

Aperture Range: f/3.5-5.6 to f/22-36

Lens Mount Type: Canon EF Mount (Full-Frame & APS-C Compatible)

Filter Thread Diameter: 72mm

Minimum Focus Distance: 1.64′ / 50 cm

Maximum Magnification Ratio: 1:5.3 (0.19x at 135mm)

Lens Optical Formula: 16 Elements in 12 Groups

Autofocus Motor: Ring-Type USM with Full-Time Manual Override

Weight: Approx. 19.0 oz (540 grams)