Canon EF 400mm f4 DO IS USM - Manual (Page 13)

ENG-12
10. Drop-In Filters
The lens comes with the drop-in Gelatin Filter
Holder 52 holding a glass filter. The holder
accepts commercially-available gelatin filters.
14mm
14mm
47mm
47mm Removing and Installing
To remove the drop-in filter, press in the left and
right lock buttons and pull the filter holder straight
up out of the slot.
To install the drop-in filter, push the filter holder
straight down into the slot until it clicks into place.
.
• The filter holder can be installed facing either forwards
or backwards.
Using a Gelatin Filter
Lift up the holder’s retaining frame
Trim the gelatin filter as shown in the figure,
and mount it in the holder.
Return the retaining frame to its closed
position.
Because the lens optics are designed to include a
glass filter, you must always install the filter
holder, even if no gelatin filter is fitted.
The Drop-In Screw-Type Filter Holder 52 and
Drop-In Circular Polarizing Filter PL-C52 are also
available (Sold separately).
COP
Y