Nikon Corporation
Canon Inc.
Panasonic Corporation
HOYA Corporation
AGC Inc.
SCHOTT AG
Carl Zeiss AG
Kinko Optical Co. Ltd.
Largan Precision Co. Ltd
Sunny Optical Technology Company Limited
Genius Electronic Optical Co. Ltd.
Asia Optical Co. Inc.
Tokai Optical Co. Inc.
Seiko Holdings Corporation
Tamron Co. Ltd.