This unique item is an expandable bellows-type lens hood that attaches to the front filter slot of a Cokin "A" filter holder. You'll need a Cokin "A" series filter holder and a lens-specific Cokin A adapter ring; all are listed here in the accessories section.
| Minimum Extension | 1.0" (24mm) |
| Maximum Extension | 3.3" (86mm) |
| Aperture Size | 4.1 x 3.4" (105 x 87mm) WxH clear opening |
| Dimensions | 5.0 x 4.3 x 1.0" (127 x 109 x 26mm) WxHxD [collapsed] |
| Weight | 0.19 lb (85 g) |