With Sea & Sea's 30123 Extension Ring 20L, you can increase the length of certain underwater lens ports to allow for the use of select Canon, Nikon, and Sony lenses with your camera housings. The ring is made of a durable, corrosion-resistant aluminum alloy with an alumite coating. Additionally, it has a port lock lever for extra security.

For Select Canon, Nikon & Sony Lenses    For Use with Ports on MDX/RDX Housings    Port Lock Function    Made of Corrosion-Resistant Aluminum    Depth Rating: 328'

Canon:
• EF-S 60mm f/2.8 Macro USM + Kenko Teleplus HD 1.4X DGX
• EF 100mm f/2.8L Macro IS USM + Kenko Teleplus HD 1.4X DGX
• EF 14mm f/2.8L II USM
• EF 24mm f/1.4L Ⅱ USM
• EF-S 10-18mmf/4.5-5.6 IS STM
• EF 16-35mm f/2.8L II USM
• EF 16-35mm f/4L IS USM
• EF 17-40mm f/4L USM ＋ M77 Internal Correction Lens

Nikon:
• AF-S DX Zoom-NIKKOR ED 12-24mm f/4G (IF)
• AF-S NIKKOR 18-35mm f/3.5-4.5G ED
• AF-S DX NIKKOR 10-24mm f/3.5-4.5G ED
• Ai AF Nikkor ED 14mm f/2.8D
• AF-S 18-35mm f/3.5-4.5G ED ＋ M77 Internal Correction Lens

Sigma:
• 10mm f/2.8 EX DC FISHEYE HSM
• 10-20mm f/4-5.6 EX DC/ HSM
• 17-70mm f/2.8-4 DC MACRO OS HSM

Tokina:
• AT-X 107 DX Fisheye 10-17mm f/3.5-4.5

Related Questions and Answers

Q: 1. Does this battery door o-ring, Sea & Sea SS-X-10066, fit the YS-27 and YS-30 strobes?

A: The Sea & Sea Battery Cap Silicone O-Ring is compatible with the Sea & Sea YS-30 TTL Underwater Strobe and the Sea & Sea YS-27DX Underwater Strobe.

Q: 2. WICH ARE THE COMPATIBLE HOUSINGS?

A: The Sea & Sea 30205 Universal Dome Port 210 is compatible with Sea & Sea MDX Underwater Housings for DSLR and mirrorless cameras, with select wide-angle lenses attached. To see compatible lenses, required extensions, and gears, please consult the Sea & Sea port chart.

Q: 3. For the Explore 60 with large core unit, are additional dividers for the core unit available?

A: Yes, we do have additional dividers. You can click on the link below to view; https://bhpho.to/36dYz7Z

Q: 4. this is the only site that mentions batteries for this item - does it take them?

A: No, it uses natural daylight, and you, therefore, must keep your fingers clear of the small white aperture on top. You can try a small white led light with your other hand for use at night, as the compass is not normally visible without adequate overhead light.

Q: 5. Does this trigger by sensing the built-in flash of the camera inside the housing?

A: You are correct it is triggered by the flash on the camera as long as you have the included fiber optic cable attached. Full directions are in the manual that comes with the flash.

Q: 6. Will this work with Canon D30 underwater camera? Am looking for handle with light/flash to use with Canon D30

A: Yes, you could use the SeaLife Sea Dragon Digital Underwater Flash with the Canon D30. You will have to attach the included Universal Flash Link Adapter for Sea Dragon Digital Underwater Flash to the camera over the built-in flash.

Q: 7. Does this Sea&Sea Macro port 87 suitable to Aquatica Double Flip Holder for Mini Macro Port https://a href= http://www.bhphotovideo.com/c/product/1225982-REG/aquatica_19356_double_flip_holder_for.html target= _blank www.bhphotovideo.com/c/product/1225982-REG/aquatica_19356_double_flip_holder_for.html?/a

A: Sorry, cannot answer your question. Perhaps Aquatica can?

Q: 8. Does this work on YS-D2?

A: YEs these should work with your YS-D2.

Q: 9. Is this the Mark I or Mark II version of the YS-D3?

A: This Sea & Sea YS-D3 Lightning Underwater Strobe is the Mark II version.

Q: 10. Is the battery compartment isolated from the rest of the electronics?

A: Yes, and it is fully sealed against leakage.