Sea & Sea Zoom Gear #31136 500-1000 and a reliable ascent-rate indicator

and a reliable ascent-rate indicator contribute to a straightforward and functional diving experience

so that tiny creatures will fill your frame

3] For over 10 years

a rear weight system supporting up to 16 lbs

Sea & Sea Zoom Gear #31136 500-1000 and a reliable ascent-rate indicatorIf you want to use your lens zoom function while taking photographs underwater, this zoom gear should be used. This Sea & Sea Zoom Gear is used to manually focus the Sigma Macro 70mm F2. 8 EX DG lens when used in a Sea & Sea housing for any camera. Sea & Sea precision machined zoom gears are manufactured from either anodized aluminum or durable plastic polymer. Both versions are corrosion resistant. Easy to install in housing.