Extend Original Nikon D-SLR Warranty (Covered by Nikon) by 2 Years for $9.99. Here is a screenshot for your reference. This extends the warranty to a total of 3 years, including the original 1-year warranty. This warranty service agreement is covered directly by Nikon itself. Note that the paperwork simply needs to be sent to Nikon within the first year according to Nikon’s corporate website and not 10 days of purchase as indicated by some forms. Cameras included are D40, D40x, and D60. For your convenience, Nikon’s phone number is 1-800-645-6689. This Nikon warranty extension usually goes for $49.