The AstrOasis 7x2" Oasis Filter Wheel was built with a simple goal: make a big-format wheel that’s thin, rigid, light-tight, and repeatably accurate—without the usual “filter wheel drama.” The result is a fully flat, 21mm-thick wheel that runs power + data over one USB-C cable, positions filters with a clever mechanical-switch base-position system, and seals against stray light like it takes the job personally.
Completely flat, ultra-clean profile at 21mm thickness
Motor is fully internal for a sleek, low-snag build
USB-C handles power + data (no separate power input needed)
High repeatability filter positioning for more consistent flat frames and calibration
Uses mechanical switches to define each filter’s true base position
Sensor layout focuses on reliable filter identification, not positional accuracy
Special belt-like friction drive inspired by vinyl record players
No gear backlash gaps to mess with accuracy
Durable and reliable long-term
Generates reverse tension after positioning to help “lock” the filter into its base position
Large-diameter bearings for smooth, stable disc rotation without adding much weight
Central rigidity screw (M4) ties front/back shells together at the center to increase stiffness
Serious anti-light-leak design across all common leak paths
Shell fitment designed like bottle caps for tight sealing
USB-C socket selected to minimize light leak + blackout mat sealing at the port gap
Unused screw holes can be sealed from inside with dedicated screws
Elastic light-shielding spacer can seal the filter-window interface to camera/OAG
Filter flexibility: supports 2" mounted filters and 50mm unmounted filters
2" mounted filters thread directly into M48x0.75
50mm unmounted filters use masks + gaskets
Camera + OAG compatibility built in
Works with ZWO / QHYCCD / ToupTek / Player One cameras
Compatible with ZWO / QHYCCD / ToupTek OAGs
No need to remove the filter disc to bolt it to the camera
Access holes allow screws/screwdriver to pass through and mount cleanly
Detection system is designed so these holes don’t affect filter ID accuracy
Cold-weather capable: supports operation down to -30°C
Modern control support: USB HID (driver-free), plus ASCOM and INDI options
Built-in temperature sensor for monitoring your environment/hardware state
Specifications
Format / capacity: 7-position wheel for 2" class filters (7x2")
Thickness:21mm (flat profile, internal motor)
Power & data:USB Type-C (single-cable power + communication)
Positioning system: Mechanical switch base positioning + sensor identification scheme
Drive method: Belt-like friction drive with reverse-tension stabilization
Bearings: Large-diameter bearings for stable disc motion
Rigidity feature:Central M4 screw locks front/back shells at center contact point
Light sealing: Shell interface sealing, USB port blackout sealing, internal plug screws for unused holes, filter-window spacer sealing
Filter support:
2" mounted filters via M48x0.75 threads
50mm unmounted filters via masks + gaskets
Camera compatibility: ZWO / QHYCCD / ToupTek / Player One
OAG compatibility: ZWO / QHYCCD / ToupTek
Connection options:
Screw mounting via M2.5 or M3 hardware through shell holes
M48–M42 adapter for M42-threaded cameras/OAGs
Included M48–M54 adapter (16.5mm thickness) for telescope-side connection solutions
Operating temperature: down to -30°C
Interfaces / control:USB HID (driver-free), ASCOM, INDI
Sensor: Built-in temperature sensor
What’s in the box?
AstrOasis 7x2" Oasis Filter Wheel
USB Type-C interface (single-cable operation)
Filter mounting support for 2" mounted and 50mm unmounted filters (masks/gaskets method)
