Authorized TIFFEN Dealer. TIFFEN Brand Filter .PLEASE READ: Please verify that your camera s lens thread size is 77mm before purchasing this kit. Your camera s lens thread size will be marked somewhere on the lens barrel or imprinted underneath your lens cap. This number is always preceded by a Ø (diameter) symbol. For example: Ø77 = 77mm lens thread size. Serves as a great and inexpensive lens protector. Use full time to protect your delicate lens from dirt, scratches and accidental damage. TIFFEN filters are made using ColorCore technology; a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch.