Sea & Sea Zoom Gear #31136
In stock — ships from Irvine, CA
This item is currently on backorder. Order now to reserve yours, and we will ship it as soon as it is back in stock.
Sea & Sea Zoom Gear #31136 is backordered and will ship as soon as it is back in stock.
Pickup currently unavailable at In Store
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Product Information
The Sea & Sea Focus Gear #31136 is a mountable accessory that lets a diver manually focus the Sigma MACRO 70mm F2.8 EX DG lens while it is sealed inside a Sea & Sea camera housing. Sea & Sea's own compatibility documentation designates part No. 31136 as a Focus Gear, intended for use together with the Compact Macro Port 79 (No. 56251) and the NX Compact Macro Base (No. 56201).
Who it is for
This accessory is for underwater photographers who shoot macro subjects with the Sigma MACRO 70mm F2.8 EX DG lens, in either its Canon or Nikon mount version, mounted in a Sea & Sea housing. It is built for shooters who need manual focus control on this specific lens without opening the housing underwater.
Key details
Focus Gear No. 31136 is manufactured from precision machined anodized aluminum or durable plastic polymer, with both versions corrosion resistant, and is designed for easy installation inside the housing. It is paired with the Compact Macro Port 79 (No. 56251) and the NX Compact Macro Base (No. 56201) as Sea & Sea's recommended port combination for this lens.
Compatibility and sizing
Focus Gear #31136 is compatible with the Sigma MACRO 70mm F2.8 EX DG lens in both Canon and Nikon mount versions, when that lens is used inside a Sea & Sea housing fitted with the Compact Macro Port 79 and NX Compact Macro Base.
DiveCatalog.com is an authorized Sea & Sea dealer and a dive shop in Irvine, California, open since 2003. Call 888-701-4017 or chat with us if you need help confirming fit with your lens, port, and housing before you order.
- Focus Gear designation: Sea & Sea documentation designates part No. 31136 as a Focus Gear for manual focus of the Sigma MACRO 70mm F2.8 EX DG lens.
- Part number: Identified by Sea & Sea as part No. 31136.
- Recommended port: Used with the Sea & Sea Compact Macro Port 79 (No. 56251).
- Recommended base: Used with the Sea & Sea NX Compact Macro Base (No. 56201).
- Lens compatibility: Fits the Sigma MACRO 70mm F2.8 EX DG lens in both Canon and Nikon mount versions.
- Housing compatibility: Installs inside a Sea & Sea housing for the applicable camera.
- Material: Precision machined from anodized aluminum or durable plastic polymer.
- Corrosion resistant: Both material versions are corrosion resistant.
- Installation: Designed for easy installation in the housing.
| Part No. | 31136 |
| Manufacturer designation | Focus Gear |
| Lens compatibility | Sigma MACRO 70mm F2.8 EX DG (Canon and Nikon mount) |
| Recommended port | Compact Macro Port 79 (No. 56251) |
| Recommended base | NX Compact Macro Base (No. 56201) |
| Housing compatibility | Sea & Sea housing for applicable camera |
| Material | Precision machined anodized aluminum or durable plastic polymer |
| Corrosion resistance | Corrosion resistant |
| Installation | Easy to install in housing |
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
Is the Sea & Sea #31136 a zoom gear or a focus gear?
It is a Focus Gear. Sea & Sea's own compatibility documentation designates part No. 31136 as a Focus Gear used to manually focus the Sigma MACRO 70mm F2.8 EX DG lens inside a Sea & Sea housing, not to operate a zoom function.
What port and base does Focus Gear #31136 require?
Sea & Sea designates the Compact Macro Port 79 (No. 56251) and the NX Compact Macro Base (No. 56201) as the recommended port combination for use with Focus Gear No. 31136 and the Sigma MACRO 70mm F2.8 EX DG lens.
Does this Focus Gear fit both Canon and Nikon versions of the Sigma lens?
Yes. Sea & Sea's compatibility documentation lists Focus Gear No. 31136 as compatible with both the Canon and Nikon mount versions of the Sigma MACRO 70mm F2.8 EX DG lens.
Is Focus Gear No. 31136 still in production?
Sea & Sea's current manual-download page and RDX Nikon compatibility chart no longer list part No. 31136, though we were unable to confirm on the manufacturer's live site whether it has been formally discontinued or replaced. Contact DiveCatalog.com to confirm current availability.
