EF / EF-S Lens Controller & Adapter for Astronomy Camera – Canon® Lens Compatible
The solution allows Canon EF and EF-S lenses to be used for astrophotography. In addition to mechanical mounting, it provides electronic control of lens focus and aperture via a USB port. Designed for compatibility with astronomical imaging software, the adapter enables users to control lens settings programmatically.
The solution allows Canon EF and EF-S lenses to be used for astrophotography. In addition to mechanical mounting, it provides electronic control of lens focus and aperture via a USB port. Designed for compatibility with astronomical imaging software, the adapter enables users to control lens settings programmatically.
The solution allows Canon EF and EF-S lenses to be used for astrophotography. In addition to mechanical mounting, it provides electronic control of lens focus and aperture via a USB port. Designed for compatibility with astronomical imaging software, the adapter enables users to control lens settings programmatically.
Product Highlights
EF/EF-S Lens Compatibility
Supports a wide range of Canon DSLR lenses, expanding lens options for astronomers.No External Focuser Needed
Uses the lens’s internal focus motor, eliminating the need for mechanical focusers..USB-Controlled Focus & Aperture
Electronic adjustment of focus and aperture via a standard USB connection — no manual handling required.
Software Integration
The adapter is designed to work with popular astrophotography software platforms via ASCOM / INDI compliant drivers.
Compact Design
Secure, low-profile mounting ensures stable alignment and minimal flex, maintaining optical quality.
Adapter variants
To support a wide range of cameras, the adapter is available in different versions, based on camera back focus:
| For Cameras with Back Focus | 17.5 mm | 12.5 mm | 6.5 mm |
|---|---|---|---|
| Mounting Interface: T-mount with | male thread | male thread | female thread |
| Compatible with Cameras such as the QHY®, ZWO®, SVBONY® -> or any other camera with M42x0.75 mm thread and a similar back focus. |
QHY183 QHY294 |
ASI120 ASI178 ASI224 ASI290 ASI385 ASI462 ASI662 ASI664 ASI676 ASI678 ASI715 |
ASI174 ASI183 ASI294 ASI432 ASI482 ASI533 ASI585 ASI990 SV405 SV605 SV705 |
Filter Support
Each adapter variant can include two integrated holders for:
1.25” filter (standard threaded filter)
36 mm unmounted filter
This design allows direct filter installation inside the adapter, maintaining a compact optical path without external accessories.
Software Support
The adapter is designed for integration with ASCOM and INDI platforms.
The INDI driver for the adapter has been completed and is now part of the official INDI source code. It will be included in the upcoming INDI release (version 2.1.5). If you're using the INDI platform, you can already build the driver from source if you prefer not to wait for the official release.
The ASCOM driver is currently under development and will be released in a future update.
* Canon is a registered trademark of Canon Inc. This product is not manufactured by, endorsed by, or affiliated with Canon Inc.