Salty SD-8.1 Dome Lens Port

• Canon 15mm f/2.8 
• Nikon 10.5mm
• Nikon 16mm f/2.8

The 6 Inch Dome is the most popular and versatile option

Pros:

• Relatively compact size, particularly on larger mirrorless or DSLR housings
• Sharp image corners when shooting underwater and when correctly matched to the length of your lens.
• Over/under shots are possible with this size dome.

Cons:

• Larger surface area, compared with the 4-inch, increasing the potential for water drops and reflections when shooting above water.

For best optical results, the front of the lens should align (or close to) the base of the acrylic of the dome.