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About ASG Astronomy

Built by imagers, for imagers

We design and hand build tilt, backfocus and filter gear in Northeast Oregon, and test every design under our own dual domes. Hundreds of imagers on almost every continent now shoot with it.

Hundredsof customers worldwide
Any scopemounts to your camera
2 × 2.2 mdomes for testing
~1 µmelectronic tilt resolution
Photon Cage on a telescope inside the dome
Our story

Round stars in every corner

Everything we make comes out of our own imaging. With fast optics and big sensors, getting round stars in every corner comes down to tilt, backfocus and how you change filters.

So we designed for it. The Photon Cage puts 4-corner tilt, independent backfocus and a removable filter slider in one device that mounts to your camera, so it works on almost any telescope. The Electronic Photon Cage does the same with motors, for remote rigs.

  • Hand built by us in Oregon
  • Tested in our observatory
  • Fits almost any telescope
  • We fix any defects
ASG Astronomy dual-dome observatory in Oregon
Where we work

Our dual-dome observatory

Two 2.2 m domes under Bortle 3–4 skies near Pendleton, Oregon. It’s where we image, where every design is tested and where customer rigs are sky-tested before they ship. We also image remotely with our partners at Deep Sky Chile.

Talk to us

Not sure what fits your setup?

Hand built by us in Oregon, tested in our dual-dome observatory, and trusted by hundreds of imagers on almost every continent.