In stock & shipping from Oregon. New: Wanderer Astro Filter Cube baseplate for existing 90 mm cages →
4-corner tilt, backfocus and a removable filter slider.
Tilt and backfocus from your PC or NINA.
Cage, M68 PRO slider, rotator and mount.
Cage, RASA 8 slider and camera mount.
The Photon Cage mounts to your camera, not the scope, and ships in filter slider or filter wheel configurations for ZWO, QHY, Player One and Moravian cameras.
Fits existing 90 mm Photon Cages.
What the RASA 11 light cone means for your optical train.
How we built a motorized, micron-level camera tilt device.
Collimate, set backfocus and start adjusting tilt.
Astrophotography project management for Windows, from first framing to final sub.
Surveys, overlays and your FOV on the live sky.
Targets, filters and exposure goals in one place.
Cloud sync pushes tonight’s plan to N.I.N.A.
Grade subs and map tilt and curvature.
We set up, tune and test your rig under real skies.
CAD, prototyping and testing for your one-off parts.
Tell us about your gear and what you want it to do.
Where every ASG design is tested.
Home / Shop / Ritchey-Chretien Accessories
ASG Astronomy builds astro camera parts and accessories to help mitigate image tilt & backfocus issues. Check out our 3D printed accessories.
