Diffraction Limited. Some companies boast that their telescopes give diffraction limited stars in the very center of the field of view. EdgeHD optics not only produce diffraction limited stars on axis, but maintain diffraction limited stars across the entire field of view of many of the most popular astrophotography cameras. Even at the very edge of a full frame camera chip, the EdgeHD 11" delivers stars of less than 2 arc seconds. The resolution of a telescope The detail in an image viewed by a telescope is theoretically limited by its resolution which increases with telescope aperture. C5 corvette exhaust manifold studs