Canon EF 8-15 mm f/ 4 L USM Fisheye Lens Service Manual (en)

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The Canon EF70-300mm f/4.5-5.6 DO IS USM
is a high-performance, compact telephoto
zoom lens for Canon EOS cameras, equipped
with DO (diffractive optics) lens elements and
an Image Stabilizer.
Innovative DO optical elements combine the
benefits of fluoride elements and aspheric
elements, and contribute to achieving high
quality and compactness.
• "DO" stands for Diffractive Optics.
• "IS" stands for Image Stabilizer.
• "USM" stands for Ultrasonic Motor.
Features
1. DO elements adjust for chromatic aberrations
that tend to occur with telephoto zoom lenses,
and contribute to achieving an innovative
compactness with outstanding image quality.
2. The Image Stabilizer gives the equivalent
effect of a shutter speed three stops faster*.
3. The zoom ring can be fixed to keep the lens at
the shortest point.
4. Ultrasonic motor (USM) for quick and quiet
autofocusing.
5. Manual focusing is available after the subject
comes into focus in autofocus mode (ONE
SHOT AF).
6. A truly round aperture hole results in a nicer
background blur.
* Based on [1/focal length] second. Generally, it requires
a shutter speed [1/focal length] second or faster to
prevent camera shake.
Thank you for purchasing a Canon product.
Conventions used in this instruction
Warning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking pictures.