Extend Original Nikon D-SLR Warranty (Covered by Nikon) by 2 Years for $9.99. 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. The paperwork simply needs to be sent to Nikon within the first year per Nikon’s corporate website and not 10 days of purchase as indicated by some forms. Cameras included are D90, D80, D70, and D50. For your convenience, Nikon’s phone number is 1-800-645-6689. This Nikon warranty extension usually goes for $49.