title: A photoelectric focus and seeing monitor for solar telescopes.
abstract: A solar focus and seeing monitor is described which utilizes the properties of an image of the telescope objective formed after putting a knife edge next to the solar limb. In a very simple way simultaneous measurements are obtained for the telescope focus and for the image motion and blurring produced by the earth's atmosphere.
authors.affiliation: Sacramento Peak Observatory, AFCRL,Sunspot, New Mexico, USA.
authors.forename: J M
authors.initials: JM
authors.lastname: Beckers