Ogma 7-Position 36mm Filter Wheel (New 2026)

For this version of OGMA's Filter Wheels, we developed the electronics and firmware ourselves from the ground up. That gives us full control over the hardware, firmware, and driver stack rather than relying on proprietary electronics and firmware from an overseas manufacturer.

This version uses a Raspberry Pi RP2040 microcontroller, allowing advanced users to develop and flash their own firmware if they wish. This can be particularly valuable for security-conscious customers who want greater visibility and control over what is running inside the device.

We implemented an automatic recovery mode. If the wheel gets stuck or loses track of its expected position, it will automatically attempt to recover and return to the correct filter position. We don't know of another filter wheel that can do that.

We also refined the external shape to make it smoother and reduce the chance of cables snagging during operation.

The OGMA Filter Wheel is engineered to deliver precision, reliability, and trust from the ground up. Its core firmware and electronics are fully developed in the United States, ensuring clean, dependable operation and long-term support. With open-source ASCOM and INDI drivers available on GitHub, the wheel integrates transparently and flexibly into your imaging workflow on both Windows and Linux.

Designed for effortless automation, it lets you switch filters remotely from home or your observatory, no external power supply required. The wheel is compatible with most cooled astronomy cameras from major manufacturers, with detailed drawings available to verify mechanical fit. This 2026 edition supports seven 36 mm filters, with additional models and slot counts offered for different setups.

Despite its robust construction, the filter wheel remains lightweight at around 17 ounces (~500 grams), making it a strong yet streamlined component of your imaging train.

This OGMA Filter Wheel is designed for broad mechanical compatibility and is among the most versatile options available today. Unlike many third-party filter wheels, it can be mounted directly to QHY cooled cameras without modifying or enlarging mounting holes. This is possible because the OGMA Filter Wheel uses correctly sized mounting clearances, whereas many non-QHY wheels use undersized holes that require drilling.

The following camera families were explicitly considered during the design process. Additional models may also be compatible depending on their mechanical interface.

• All OGMA cooled cameras.
• ToupTek and ZWO cooled cameras with six M2.5 mounting holes on the front flange (e.g., ATR3, ASI2600, ASI6200).
• Player One cooled cameras with six M2.5 mounting holes on the front flange, provided you are comfortable installing the filter wheel rotated by 30°.
• Threaded cameras with a male M42 front thread, such as ASI1600, ASI294, SVBony SV605, or SV405.
• The package also includes adapters to support a wide range of camera and telescope connections:
  • M54 (M) to M42 (F) thread adapter (recommended on the camera side for M42 front threaded cameras)
  • M54 (M) to M48 (F) x 20 mm extension (recommended on the telescope side when not using an OAG)

For detailed installation instructions, firmware updates, and mechanical drawings, please visit the manual pages and firmware section.