by Altair Support | Aug 18, 2020
ERFs are used for 2 main reasons. Improved image quality, by reducing heat buildup and hot air currents inside your telescope and by keeping your Hydrogen Alpha or Calcium filter at a stable constant temperature, it keeps it “on-band” – Etalons of...
by Altair Support | Aug 10, 2020
Gently tighten the grub screws embedded in the ring / bezel around the base of the dew-shield with an Allen key until it stops slipping. Don’t over tighten them or you risk damaging the optical tube!
by Altair Support | Aug 10, 2020
Firstly, please be aware that even a large about of dust will not affect image quality, because it’s at the pupil of the optical system and cannot be in focus. The “piston” effect of the focuser drawtube moving back and forth does inevitably draw outside air into the...