AP 100/800 ED Triplet lens in cell

The 100/800 mm system is the classic 4-inch entry-level size, but here in outstanding optical and mechanical quality! You can rest assured that the optics will also achieve the theoretical specifications in the sky.

The very high-quality optics were deliberately chosen with a slightly longer focal ratio of f/8.0. The focal length of 800 mm is a very good compromise between high magnification for visual use and "space downwards" for great astrophotography with an extended field of view.