What is the purpose of the QHYCCD Adapter Kit - Combo A1?
The QHYCCD Adapter Kit - Combo A1 provides a pre-selected group of adapters to create a solid mechanical connection between a QHY294M or QHY163M, its CFW3M-US filter wheel and an optional OAGM. It ends in M48 threads at the 55mm back focus that a multi-purpose coma corrector needs.
Why use a QHYCCD adapter kit instead of buying individual adapters?
This kit eliminates the trial-and-error of matching various thread standards (e.g., M42, M48, M54) and calculating the required extension lengths. It ensures all components are designed to work together, providing a more rigid and reliable connection than a mix-and-match solution, which can introduce flexure or tilt.
Is the QHYCCD Combo A1 kit compatible with all QHYCCD cameras?
No. Adapter kits are typically designed for specific camera models or sensor series that share a common back focus requirement. QHYCCD designed Combo A1 for the QHY294M and QHY163M with a QHYCFW3M-US filter wheel and an optional QHYOAGM; verify your exact camera and optical train before purchasing.
How do I know which QHYCCD adapter combo I need?
The correct adapter combination depends entirely on your specific equipment: the camera, any accessories (like a filter wheel or off-axis guider), and your telescope's focuser or corrector. QHYCCD provides connection diagrams for their cameras; consult these resources to determine if the Combo A1 is the correct solution for your setup.
Does the QHYCCD Adapter Kit - Combo A1 set the back focus automatically?
The kit provides the physical components needed to achieve a specific back focus distance. You are still responsible for assembling them in the correct order according to the requirements of your camera and any field flatteners or focal reducers in your optical path.
What are the thread sizes in the QHYCCD Combo A1 kit?
The kit contains a 5mm M54-M48 threads adapter, a 3mm spacer, a 0.5mm spacer, a 10mm spacer and eight 22mm M3 screws, and ends in M48 threads at 55mm back focus. To ensure this kit will work for your needs, you must consult official QHYCCD documentation or system charts that explicitly call for the "Combo A1" kit for your imaging train configuration.
