Optics are specified and tested for image quality so 80% of incident light falls within 0.6 arc
Finish on the mirrors is 80/60 for the primary and 60/40 on the secondary.
Focus may be manually controlled or commanded by the control system (focus motor powered only
when focusing to minimize heat generation)
Low temperature (-40 degrees Celsius) operation optical encoders
2-speed motorized focus with high accuracy position readout
Invar spacers available to compensate for temperature and maintain focus (optional on 0.4M)
Telescope Optics Custom Features