Canon RF 35mm F1.4 L VCM Instructions Manual page 16

Filters (Sold separately)
Only one filter with a thickness of 0.2 mm/0.008 in. or less may be used.
z
When printing the template, make sure that the illustration size remains the same. Check that the printed-
z
out size is the same as the measurements shown in the illustration.
Cut along the middle of the lines printed on the filter template. Any deviation from the template line width
z
can cause the following issues.
Note 1: If you cut inside the lines, light will come in around the edges of the filter, preventing it from working
fully. In particular, there can be differences with exposure and color patches in the corners.
Note 2: If you cut outside the lines, it may not fit in the rear filter holder, or the filter corners could contact
the camera, damaging the camera or filter.
ENG-15