This is beneficial for some terrestrial applications in particular with the Field or Birder models. A Full Aperture 89mm diameter Solar Filter may be substituted for the included 30mm diameter Off-axis Solar Filter on the Standard and Duplex models. Full Aperture 180mm diameter and 90mm diameter Off-axis Solar Filters are available for the Questar 7 telescopes. A hand-sewn leather Deluxe Carrying Case incorporating combination locks may be substituted for the standard Vinyl Case with key locks provided with the Standard and Duplex models. This option is described in detail in our article of advice to those interested in selecting a Questar telescope.
Questar telescopes are American engineered, made, and assembled to provide a lifetime of service.