AstrOasis 7x2" Oasis Filter Wheel (USB-C, Flat 21mm, Clock-Level Precision)

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)

• M48–M42 adapter (for M42-threaded camera/OAG connection method)

• M48–M54 adapter (16.5mm thickness) for telescope-side connection

• Dedicated internal sealing screws (for unused mounting holes)

• Light-shielding spacer / sealing elements (for camera/OAG interface sealing)

Software and Docs

• User Manual

• ASCOM Driver

• FirmWare