Reference Chart

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Page 4 of 23 DL (Dry Lock) Port System Charts Rev. 2020.06.19
OPTION 1
(Recommended)
OPTION 2
OPTION 3
Canon 16-35 mm f/4L EF IS USM
Larger dome is best for split
shots (half-in, half-out of the
water). AF only.
Product(s) required:
75340 Dome Port
75028 Extension
75050 Extension
5509.31 Zoom Gear
Optional accessories:
0923.01 Anti-Reflection
Ring
Compact and lightweight for
travel. Better for close focus
wide angle. AF only.
Product(s) required:
75344 Dome Port
75028 Extension
75050 Extension
5509.31 Zoom Gear
Optional accessories:
0923.01 Anti-Reflection
Ring
MF option. Zoom is not
supported. Lens must be
used at a fixed focal length.
Product(s) required:
75340 Dome Port
75028 Extension
75050 Extension
5509.71 Focus Gear
Optional accessories:
0923.01 Anti-Reflection
Ring
Canon 17-40 mm f/4L EF USM
Superior edge sharpness
compared to shorter port
option. Larger dome is best
for split shots (half-in, half-
out of the water). AF only.
Product(s) required:
75340 Dome Port
75050 Extension
5509.28 Zoom Gear
Optional accessories:
0923.02 Anti-Reflection
Ring
Compact and lightweight for
travel. Better for close focus
wide angle. AF only.
Product(s) required:
75344 Dome Port
75050 Extension
5509.28 Zoom Gear
Optional accessories:
0923.02 Anti-Reflection
Ring
Larger dome is best for split
shots (half-in, half-out of the
water). AF only.
Product(s) required:
75340 Dome Port
5509.28 Zoom Gear
Optional accessories:
0923.02 Anti-Reflection
Ring
Canon 17-85 mm f4-5.6 EF-S IS USM
Superior edge sharpness
compared to shorter port
option. Larger dome is best
for split shots (half-in, half-
out of the water). AF only.
Product(s) required:
75340 Dome Port
75050 Extension
5509.28 Zoom Gear
Compact and lightweight for
travel. Better for close focus
wide angle. AF only.
Product(s) required:
75344 Dome Port
75042 Extension
75050 Extension
5509.28 Zoom Gear
Larger dome is best for split
shots (half-in, half-out of the
water). AF only.
Product(s) required:
75340 Dome Port
75020 Extension
5509.28 Zoom Gear