Description
This is a 7-element, 4-group teleconverter designed to double the effective focal length of a camera lens (e.g., turning a 300mm lens into an equivalent 600mm lens). Originally manufactured in Japan by Kenko (part of the Tokina-Hoya-Kenko group), the “MC7” designation represents its use of 7 high-quality, multi-coated optical glass elements.
