When used with a 77mm diameter wide-angle zoom lens, the M77 Internal Correction Lens from Sea & Sea corrects image aberration and distortion. It improves the resolving power at the edges and corners of images to suppress field curvature and distortion by a value of 2 f-stops, making it possible to realize images with sharp edges and corners. The lens fits the Sea & Sea Fisheye Dome Port 240 and helps reproduce clear images when mounted on a compatible lens for interchangeable lens (full-frame SLR) cameras.
Sea & Sea Fisheye Dome Port 240 Lens: Canon EF17-40mm F4L USM, Canon EF 16-35mm F4L IS USM, Nikon AF-S 16-35mm F4G ED VR, Nikon AF-S 18-35mm F3.5-4.5G ED
Sea & Sea SS-52131 Specs
1 element in 1 group (AR multi-coated on both sides)
Optical glass (AR multi-coated on both sides) and corrosion-resistant aluminum alloy