Ul­tra-Sta­ble Fo­cus Sys­tem (USFS)

Sky at Night Magazine - - FIRST LIGHT -

SCTs are focused by turn­ing a fo­cus knob that moves the pri­mary mir­ror back and forth. How­ever, early fo­cus de­signs suf­fered from mir­ror shift, which caused the im­age to move de­pend­ing on which way the fo­cus knob was be­ing ro­tated. The RASA de­sign elim­i­nates this is­sue with a new ‘ul­tra-sta­ble fo­cus sys­tem’.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.