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ASG Core Products

Mechanical Photon Cages
Remove tilt with our most popular solution. 4 corner tilt removal and pin-point stars.

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Electronic Photon Cages
Remotely remove tilt with precision electronic tilting from your back yard or remote observatory.

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461 Photon Cages
Looking no further than our mechanical & electronic photon cages for the larger medium format setup!

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RASA 11 Standard System
Upgrade your standard RASA 11 to M54 and 2″ filter sliders and get max benefit from f/2 speeds.

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RASA 11 PRO System
No compromises with large M68 aperture and 50x50mm square filter slider. Full-frame F/2 performance!

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RASA 8 System
Add precision 4-corner tilting, backfocus adjustment, and a fully removable filter slider on your RASA 8!

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Custom Astrophotography Builds
Send all your items to our Oregon offices and will professional build, test, crate, and ship your project. Let us build & test your next Astrophotography setup!

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Product Testing & Design Services
We provide professional grade engineering services and product testing within our professional grade multi-dome observatory.

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Inside our Dual Dome Observatory
With more and more need for a professional observatory structure, we build our unique dual dome building. Follow as we show some of the challenges and benefits to this build.

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Education & Tutorial Articles

ASG SubInspector
Free software that lets you analyze a folder of fits/xisf images based on HFR, FWHM, Stars, Eccentricity, and overall scoring. Makes it easy to pull bad subs out of a folder.

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Special RASA 11 Light Analysis
What you might like to know about RASA 11 and special optical train considerations. F/2 is fast, and we optimize systems specifically for these scopes.

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Engineering the Electronic Tilter
As one of the first to develop an electronic precision astrophotography camera tilt device, we take a look at the engineering project.

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Collimation, Backfocus & Tilt Guide
Our quick guide to explaining what collimation is, how to quickly setup backfocus, and start adjusting tilt with your astronomy gear.

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Calibration Frames Explained
Creating calibration frames for Astrophotography images is easy! A quick guide to Master Bias, Master Flats, Master Darks, and Master Flat Darks.

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CNC aluminum

PRO Filter Slider - 50x50 - CNC Aluminum

PRO Filter Slider - 50x50 - CNC Aluminum

$75.00

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PRO Filter Slider - 50x50 - CNC Aluminum

$75.00

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Astronomik 6nm MaxFR 2inch (M48)

Astronomik 6nm MaxFR 2inch (M48)

$719.95 $719.95

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Astronomik 6nm MaxFR 2inch (M48)

$719.95 $719.95

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Astronomik 6nm MaxFR 50x50mm Filters

Astronomik 6nm MaxFR 50x50mm Filters

$739.95 $789.95

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Astronomik 6nm MaxFR 50x50mm Filters

$739.95 $789.95

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NEW!

ASG M68x1 - 5mm spacer

ASG M68x1 - 5mm spacer

$49.00

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ASG M68x1 - 5mm spacer

$49.00

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Astronomik Deep-Sky RGB 50x50mm Filters

Astronomik Deep-Sky RGB 50x50mm Filters

$719.95 $789.95

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Astronomik Deep-Sky RGB 50x50mm Filters

$719.95 $789.95

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Astronomik Luminance L-2 UV-IR 50x50 Filter

Astronomik Luminance L-2 UV-IR 50x50 Filter

$149.95

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Astronomik Luminance L-2 UV-IR 50x50 Filter

$149.95

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ASG Photon Cage - 461 Edition

ASG Photon Cage - 461 Edition

$1,249.00

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ASG Photon Cage - 461 Edition

$1,249.00

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Lead Time: There is currently a short lead time on these parts. Email us to find out how soon this part will be available.

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Existing Cage Upgrade

ASG Photon Cage Duo Ring Upgrade

ASG Photon Cage Duo Ring Upgrade

$179.00

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ASG Photon Cage Duo Ring Upgrade

$179.00

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Astronomik Deep-Sky RGB 2inch (M48) Filters

Astronomik Deep-Sky RGB 2inch (M48) Filters

$639.95 $639.95

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Astronomik Deep-Sky RGB 2inch (M48) Filters

$639.95 $639.95

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Astronomik Luminance L-2 UV-IR 2inch (M48) Filter

Astronomik Luminance L-2 UV-IR 2inch (M48) Filter

$149.95

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Astronomik Luminance L-2 UV-IR 2inch (M48) Filter

$149.95

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