The QHY OAG comes in three versions to accommodate image sensors of various sizes. This is the "large" size.
All QHY Off-Axis Guiders have the same main body, including the prism, but the telescope/camera interface is sized to accept thread adapters of different diameters. Regardless of the diameter of the interface, it has six (6) 3mm holes and, without adapters installed, a thickness of 10mm. Both the telescope side and camera side adapters have a thickness of 3mm. The final thickness of the OAG depends on whether you need to use just the telescope side thread adapter or both adapters.
If you are using one of the medium sized QHY filter wheels, it will connect directly to this OAG. No camera side adapter will be required.
The medium QHY OAG has a diameter of 62mm and will accept both M42/0.75 and M54/0.75 adapters. Two of each of these adapters are included. You can use either size adapter on the telescope or camera side.
The QHY OAG-M supports camera models with APS-C, APS-H, and 36x34 sensors, including the QHY16200A.
Alternatively, the OAG can be attched directly to the medium QHY filter wheel.
Table showing small, medium and large OAGs
|Telescope Adapter Ring||M42/0.75||M54/0.75||M60/0.75|
|The circle diameter of six M3 screw location||54mm||62mm||68mm|
|Suitable CCD SIZE||2/3inch||APS-C||36x24mm|
|Field of View (Apparent)||No|
|Number of Elements||No|
|Additional Specifications of Product||No|