Seven years as I remember.
I found a link regarding appliances, not cameras. These are Ca regulations but something similar should exist throughout the US.
Quoting California Civil Code, Sec. 1793.03.
(a) Every manufacturer making an express warranty with respect to an electronic or appliance product described in subdivision (h), (i), (j), or (k) of Section 9801 of the Business and Professions Code, with a wholesale price to the retailer of not less than fifty dollars ($50) and not more than ninety-nine dollars and ninety-nine cents ($99.99), shall make available to service and repair facilities sufficient service literature and functional parts to effect the repair of a product for at least three years after the date a product model or type was manufactured, regardless of whether the three-year period exceeds the warranty period for the product.
(b) Every manufacturer making an express warranty with respect to an electronic or appliance product described in subdivision (h), (i), (j), or (k) of Section 9801 of the Business and Professions Code, with a wholesale price to the retailer of one hundred dollars ($100) or more, shall make available to service and repair facilities sufficient service literature and functional parts to effect the repair of a product for at least seven years after the date a product model or type was manufactured, regardless of whether the seven-year period exceeds the warranty period for the product.
And this one.
Quoting Business and Professions Code, Sec. 9801(h)-(k)
(h) "Electronic set" includes, but is not limited to, any television, radio, audio or video recorder or playback equipment, video camera, video game, video monitor, computer system, photocopier, or facsimile machine normally used or sold for personal, family, household, or home office use.
(i) "Appliance" or "major home appliance" includes, but is not limited to, any refrigerator, freezer, range, microwave oven, washer, dryer, dishwasher, trash compactor, or room air-conditioner normally used or sold for personal, family, household, or home office use, or for use in private motor vehicles.
(j) "Antenna" includes, but is not limited to, a resonant device designed especially for the purpose of capturing electromagnetic energy transmitted by direct satellite or commercial radio or television broadcasting facilities. An antenna and its associated accessories are not deemed to be a part of a set and shall be considered, under this section, to be located outside or in the attic of a residence.
(k) "Rotator," when used in connection with an antenna installation or repair, includes, but is not limited to, an electromechanical device operated from a remote location to rotate an antenna on a horizontal plane. A rotator and its associated accessories are not deemed to be a part of a set and shall be considered under this section, with the exception of the directional control unit, to be located outside or in the attic of a residence.