Canon EF 300mm f/4L IS USM Instruction page 2

Developed for Canon EOS cameras, the Canon EF 300mm f/4L IS Ultrasonic lens is an
interchangeable SLR lens equipped with a dual-mode Image Stabilizer (IS). The Image Stabilizer
reduces blur caused by camera shake approximately two full shutter speeds compared to normal
handheld shooting.
Features
1. The Image Stabilizer operates by moving optical elements inside the lens. Features include:
• A special mode provided to obtain steadier viewfinder images during panning etc.
• A switch turns the Image Stabilizer circuit on and off.
2. Two UD-glass elements suppress chromatic aberrations for sharp, high-contrast images expected of
an L-series lens.
3. Ultrasonic Motor (USM) for quiet autofocusing.
4. Wide focusing ring makes manual focusing easy.
5. Minimum focusing distance of 1.5 m / 4.9 ft.
6. Compatible with Extender EF 1.4× ll and EF 2× ll.
7. The Image Stabilizer can be used while an Extender is attached (except with certain EOS cameras).
: Warning to prevent malfunction or a flawed photo.
Thank you for purchasing a Canon product.
: Helpful tips.
ENG-1