for Sigma

Nimar NI31S Spherical Dome port with bayonet coupling. This dome port is used with select fixed lenses from Sigma. This lens port has an internal diameter of 94mm, and its viewport is made of acrylic glass.

Nimar Macro Port NI32 with M67 external thread, for 90mm - 100mm - 105mm macro lenses, it is made of optical glass with anti-diffused reflection coating and anti-fog coating. 

The Nimar Macro Port NI32S is made of optical glass with anti-diffused reflection coating and anti-fog coating. Fits Sigma MACRO 105 mm F2.8 EX DG lens

Spherical Port in Crystal Glass with Zoom control Nimar NI35CA1 for the Canon.

Nimar Macro Port NI37C with M67 external thread, for 45mm - 50mm - 60mm macro lenses, it is made of optical glass with anti-diffused reflection coating and anti-fog coating.

The Nimar NI47S Flat Port with Zoom Control is a flat glass lens port for an underwater Canon camera housing and fits the 17-70mm F2.8-4.5 DC MACRO HSM and DC MACRO SLR Lenses. Flat ports magnify an image more than spherical or dome ports and are better for extreme close-up shots.

The Nimar NI47S1 Flat Port with Zoom Control is a flat glass lens port for an underwater Canon camera housing and fits the Sigma 17-70 mm F2.8-4 DC MACRO (OS) HSM/C lens. Flat ports magnify an image more than spherical or dome ports and are better for extreme close-up shots.