(patent pending). compatible with both nikkor g lens & f lens (include non-ai & ai lens mounts). advanced -element/ -group optical design incorporating ultra-high index tanatalum-based optical glass by caldwell photographic in the usa (patent pending). increase maximum aperture by stop. increase mtf....
(patent pending). compatible with both nikkor g lens & f lens (include non-ai & ai lens mounts). advanced -element/ -group optical design incorporating ultra-high index tanatalum-based optical glass by caldwell photographic in the usa (patent pending). increase maximum aperture by stop. increase mtf....
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