SVBONY SV905C 1.23MP Type-C Guide Camera - 1.25"

IMX225 Sensor: 80% QE and 4.0e Read Noise for Reliable Guiding

At the core of the SV905C is the Sony IMX225 sensor, chosen for its high sensitivity and low noise characteristics. A peak QE of 80% means the camera makes efficient use of incoming light, enabling it to lock onto fainter guide stars than less sensitive cameras. This is critical when your target is in a star-poor region of the sky or when using an off-axis guider.

The camera's low read noise of 4.0e, combined with its HCG (High Conversion Gain) mode, preserves the signal-to-noise ratio even when you increase the gain. This results in cleaner guide star profiles and more stable guiding, as the software isn't chasing atmospheric scintillation or electronic noise.

Smart Design: 8.5mm/12.5mm Back Intercept and Repeatable Focusing

The SV905C is built for practical use in the field. It features dual back intercept distances of 8.5mm and 12.5mm, providing the flexibility needed to achieve focus in various setups, from separate guide scopes to off-axis guiders with different prism-to-sensor distances. Its standard 1.25" body fits directly into most guide scopes and focusers.

For imagers who use portable setups, the camera body includes a scale mark and snap ring. This simple but effective feature allows you to mark your focus position, ensuring you can return to perfect focus quickly night after night without guesswork. The modern Type-C USB 2.0 port provides a reliable connection to your control computer.

Broad Compatibility: PHD2, ASCOM, and Multi-OS Support

A guide camera is only as good as its software support, and the SV905C offers wide-ranging compatibility. It works seamlessly with the industry-standard PHD2 guiding software via its ASCOM driver, as well as other popular capture programs like SharpCap and FireCapture on Windows.

The SV905C isn't limited to a single operating system. With support for Windows, Mac OS, Linux, and even Raspberry Pi through AstroDMX Capture, it integrates into virtually any imaging setup, from a laptop in the field to a remote observatory running on a mini-PC.

Svbony SV905C vs. ZWO ASI120MM Mini: A Guiding Comparison

The SV905C is a direct competitor to the popular ZWO ASI120MM Mini, with both cameras targeting the entry-level autoguiding market. While they share the same 1.2MP resolution and 3.75µm pixel size, the SV905C holds a few key advantages.

• Higher Sensitivity: The ZWO ASI120MM Mini's AR0130CS sensor has a peak QE of around 75%. The Svbony SV905C's IMX225 sensor achieves a higher peak QE of 80%, giving it a measurable edge in detecting faint stars.
• Modern Sensor and Connector: The IMX225 is a more modern sensor known for its excellent sensitivity and low-noise performance. The SV905C also uses a more robust and reversible Type-C USB 2.0 connector.
• Focusing Aids: The SV905C's built-in scale mark is a practical feature for achieving repeatable focus that the ASI120MM Mini lacks.

While the USB 2.0 interface limits the SV905C for serious high-speed planetary imaging, its sensor and thoughtful design make it a highly capable and cost-effective autoguider.