At ASG Astronomy, we’re passionate about the science of astrophotography and the tools that make it possible. We created the Photon Cage out of a real need—we required a single device that could handle 4-corner tilting, a fully removable filter slider, and independent backfocus adjustment. It became a complete solution for astro photographers.

The Photon Cage is a one-of-a-kind device that combines these three essential functions into a single, easy-to-use unit. It’s designed to seamlessly integrate with a wide range of telescopes—from RASAs and refractors to SCTs and reflectors—and moves with your camera, so you can get perfectly flat images, no matter your setup.

Beyond the Photon Cage, we also offer custom camera mounts and 3D-printed parts to help you build the ultimate astrophotography rig.

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