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The QHYOAG is a thin and solid design. The OAG main body is just 10mm thick. Adding an M42 thread or M54 adapter ring adds only 3mm for a total thickness of 13mm. There are six 3mm through holes in the OAG for direct connection to the QHYCFW2 and QHY “A” series camera. If you do not have a QHYCFW2 or QHY “A” series camera, you can also use this OAG with a third part adapter ring on the camera side.

There are three models of QHYOAG: QHYOAG-S, QHYOAG-M, and QHYOAG-L for the different size sensors (See table below).

The QHYOAG comes with a multi-thread 1.25-inch focuser. The focuser has a locking thumbscrew to hold the guide camera fixed after focusing.

The prism position can be adjusted and can be locked to fix its position. The prism is 8mm x 8mm size.

The QHYOAG-S has a M42/0.75 interface to the telescope. It is compatible with the QHY90A, QHY695A and the QHYCFW2-S. It can be used with 2/3″, 1″ and 4/3″ sensors.

The QHYOAG-M has a M54/0.75 interface to the telescope. It is compatible with the QHY16200A and the QHYCFW2-M. It can be used with APS-C, APS-H and 36x24mm sensors.

The QHYOAG-L has a M60/0.75 interface to the telescope. It is compatible with the QHY16803 and the QHYCFW2-L. It can be used with sensors of 36x24mm, 37x37mm or 48x36mm (requires a special adapter).


Prism: 8mm x 8mm Multi-Coated Prism
Through Hole Size: 8mm diameter
Focuser: 1.25-inch Multi-thread Focuser with 6mm range
Focuser Locker: Yes
Guide Camera Position Adjust: Yes
Directly Install Method: Six M3 screw to QHYCFW2 or QHY “A” series camera
Telescope Interface: M42/M54/M60 0.75 adapter ring (3mm thick)
Use for other camera: Yes, with third party M42/M54/M60 adapter ring on camera side
Weight (QHYOAG-S): 416g
Weight (QHYOAG-M):419g
Weight (QHYOAG-L):419g


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