Sea&Sea 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 18-35MM F3.5-4.5 ED)
(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 18-35MM F3.5-4.5 ED)