Field Of View Calculator
For DSLR and SLR Cameras
To find the field of view (fov) for a camera lens or telescope enter the focal length (fl) and click the calculate button. You can select or convert the fov result format in either degrees-minutes-seconds format or decimal degrees below.
Updated March 2011 with latest Canon and Nikon DLSR cameras. These are still by far the most popular DSLR cameras used in astronomy, should anyone be interested I'll add the Sony and Pentax models.
Calculations for fov size follow the formula in Astrophotography for Amateurs, Michael Covington, 1999, page 75.
For a list of camera models and dimensions used click here.