Download Print this page

Safety Precautions; Handling Cautions - Canon EF135mm F2L USM Instruction

Ef lens built-in ultrasonic motors
Hide thumbs

Advertisement

Developed for EOS cameras, the Canon EF 135mm f/2L USM, EF 200mm f/2.8L II USM, EF 300mm
f/4L USM, and EF 400mm f/5.6L USM lenses feature built-in ultrasonic motors.
The USM enables quick and quiet autofocusing. This is especially advantageous for sports
photography when quick focusing is required and for stage performances when quietness is essential.
The "L" designation indicates the use of top-notch lens glass to obtain superior delineation, resolution,
and contrast.
: Safety precautions and warnings to prevent malfunction.
a Safety Precautions
1. Do not look at the sun or a bright light source through the lens or camera. Doing so could result in loss of
vision. Looking at the sun directly through the lens is especially hazardous.
2. Whether it is attached to the camera or not, do not leave the lens under the sun without the lens cap
attached. This is to prevent the lens from concentrating the sun's rays, which could cause a fire.
a Handling Cautions
If the lens is taken from a cold environment into a warm one, condensation may develop on the lens
surface and internal parts. To prevent condensation in this case, first put the lens into an airtight plastic bag
before taking it from a cold to warm environment. Then take out the lens after it has warmed gradually. Do the
same when taking the lens from a warm environment into a cold one.
ENG-1
Thank you for purchasing a Canon product.
: Things to know

Hide quick links:

Advertisement

loading

  Also See for Canon EF135mm F2L USM