ZWO OAG-L-68 Large Prism Off-axis Guider Adapter M68 OAG Astronomical Accessory for ZWO ASI Square EFW and ASI461 Camera
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ZWO OAG-L-68 Large Prism Off-axis Guider Adapter M68 OAG Astronomical Accessory for ZWO ASI Square EFW and ASI461 Camera
Features:
- OAG-L is the latest iteration of M68 OAG with a larger prism size of 12x12mm. The bigger clear aperture brings wider field of view in guiding. It is easy to use, and suitable for users who are interested in long focal length photography. To take the most advantage of it, we recommend you to match it with large format guiding cameras.
- Lightweight and exquisite, 17.5mm thickness.
- Prism size: 12 x 12mm.
- The effective light-passing aperture is 11.7mmx8.3mm.
- Can be used to connect the main camera and guide camera simultaneously. No guide telescope required.
- Equipped with an M68 sensor tilt plate (5mm).
Instruction:
- For guiding, OAG-L can only work with ASI Mini cameras like ASI174MM Mini, ASI290MM Mini and ASI120MM Mini.
- Considering the large prism size, we don’t recommend you use OAG-L with telescopes whose clear aperture is smaller than M68.
- Yet it is recommended to use with 2” EFW or 7x36mm EFW, and with APS-C cameras (ASI2600) or full frame cameras (ASI6200/2400). The large clear aperture supports full frame cameras without vignetting.
- The major differences between OAG-L and M68 OAG are about the prism size and the threads. OAG-L removed the inner threads so you can directly use the screws to connect it to other equipment.
- If the thread of your telescope side is M68, then you don’t need to remove the M68 sensor tilt plate coming with OAG-L. On the contrary, you need to remove it and use some other sensor tilt plate at the corresponding thread of your telescope.
Precaution:
- While adding OAG-L into your optical train, please make sure the prism won’t block the camera sensor.
- You can use the guiding screw to adjust the guiding camera’s focus length. Please make sure the distance from the prism to the main camera and to the guide camera are the same. To ensure the result, it is better to do this at daytime for the adjustment will be very difficult at night.
Package Included:
- 1 x OAG-L-68
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