Sea & Sea m77 Internal Correction Lens
This M77 internal Correction Lens fits Canon EF17-40mm F4L USM, Canon EF 16-35mm F4L IS USM, NIkon AF-S 16-35mm F4G ED VR, NIkon AF-S Nikkor 18-35 MM F3.5-4.5 ED. When used with a 77mm diameter wide-angle zoom lens, the lens corrects image aberration and distortion*. The lens helps reproduce clear images when mounted on a compatible lens for interchangeable lens cameras (full-frame SLR cameras).
Helps rectilinear lenses have sharper corners, in smaller domes particularly.
* Field curvature and distortion are rectified by approximately 2 f-stops value.
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