ASTRODESIGN,Inc.
Carl Zeiss AG
COSINA CO., Ltd.
Eastman Kodak Company
Fuji Photo Film Co., Ltd.
Jos. Schneider Optische Werke GmbH
Kenko Tokina Co., Ltd.
Komamura Corporation
Leica camera AG
Olympus Imaging Corp
Panasonic Corporation
Sanyo Electric Co., Ltd.
Sigma Corporation
Tamron Co., Ltd.