Canon EF-S 10-22mm f/3.5-4.5 USM Instruction page 7

5
Filters (Sold Separately)
You can attach filters to the filter mounting
thread on the front of the lens.
¡Only one filter may be attached.
¡If you need a polarizing filter, use the Canon
Circular Polarizing Filter (77mm).
6
Extension Tubes (Sold Separately)
You can attach Extension Tube EF12 II for
magnified shots. The shooting distance and
magnification are shown below.
Camera-to-Subject
Distance (mm)
Near
10mm
EF12 II
22mm 155
Although Extension Tube EF25 II can be attached,
it is not recommended because the lens-to-subject
distance will be very short.
Manual focusing is recommended for accurate
focusing.
Magnification
Far Near Far
Incompatible
165 0.77× 0.58×
ENG-6