Gelatin Filter Holder - Canon EF 17-40mm f/4L USM Instruction

Ultrasonic ef lens
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8. Filter Holder
There is a gelatin filter holder at the rear of the
lens. Cut the gelatin filter to fit within the white
frames. Then insert the gelatin filter into the filter
holder.
• Only one filter can be used.
• When you use a gelatin filter, ghosting may
appear in the image.
9. Extension Tubes
(Sold separately)
You can attach Extension Tube EF12 II or EF25
II for magnified shots. The shooting distance and
magnification are shown below.
Camera-to-Subject
Distance (mm)
Near
17mm
155
EF12 II
40mm
206
17mm
EF25 II
40mm
196
Manual focusing is recommended for accurate
focusing.
Magnification
Far
Near
Far
159
0.83×
0.70×
271
0.59×
0.32×
Incompatible
218
1.02×
0.70×
ENG-8

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