Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: ###############################################################################################################################################################################################################################################################
Product description: Canon EF 75-300mm f/4-5.6 III Lens Specifications: Diagonal Angle of View: 32 11' - 8 15', Focus Adjustment: Front group rotating extension system with Micromotor, Closest Focusing Distance: 1.5m/ 4.9 ft. We at 47th Street Photo assemble a large array of digital camera kits to help you make the most of your photography experience, 47th Street Photo makes every effort to ensure your complete satisfaction and we put a lot of thought in to which accessories you need in order to take your photography to the next level. In this kit 47th Street Photo put together the following items: ~ Canon EF 75-300mm f/4-5.6 III. ~ Opteka 3 Piece HD2 Filter Kit. ~ Opteka Extra LP-E8 Battery and Rapid Charger. ~ 53 Travel Tripod. ~ Camera and Accessory Bag. ~ 16GB SD Card with Reader. ~ 5 Piece Cleaning kit. ~ Mini HDMI to HDMI cable
Product feature: EF 75-300mm f/4-5.6 III Lens Specifications: Diagonal Angle of View: 32 11' - 8 15', Focus Adjustment: Front group rotating extension system with Micromotor, Closest Focusing Distance: 1.5m/ 4.9 ft., Extra LP-E8 Extended Life High Capacity Battery with Charger, Mini HDMI to HDMI cableMini HDMI to HDMI cable, Package includes: EF 75-300mm f/4-5.6 III,53 Travel Tripod, Camera and Accessory Bag, Extra LP-E8 Extended Life High Capacity Battery with Charger, 16Gb SD Card with Reader, Opteka 3 Piece HD2 Filter Kit, 5 Piece Cleaning kit and Mini HDMI to HDMI cable
Product brand: Canon
Target attributes: Mount
Answer: attribute: mount
value: canon ef
source: product description