User Manual

ENG-25
 Because the lens optics are designed to include
a filter, you must always attach either a Canon
PROTECT filter or a commercially available filter
before attaching a Drop-In Screw-Type Filter
Holder.
 Note that filter frame thickness may prevent
some commercially available lens filters from
being used.
 With EOS cameras that have a built-in flash,
a drop-in filter may come in contact with the
camera. Before attaching/detaching a drop-in
filter, detach the lens from the camera.
 The Drop-In Gelatin Filter Holder 52(WIII) and
Drop-In Circular Polarizing Filter PL-C52(WIII)
are also available (sold separately).
 The 52/52(WII)-series drop-in filters can also be
used. However, their exterior color is different
than the lens body.
Drop-In Filters