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When you add your cameras sensor as an FOV indicator, there is a checkbox saying "Internal guide chip" Check that box..
This then allows you to input the details :
Sensor size : I used the QHY5 sensor size, as the Lumicon OAG mirror is bigger than the sensor hence - full illumination.. With yours, use the size of the mirror.
guide chip offset : This is how far offset the guide chip is from the imaging chip. Measurement from the center of the guide chip to the center of the imaging chip. I measured from the center of the OAG's aperture to the center of the pick off mirror.
On first light, with everything at 90 degree alignment, I found the SN FOV I to be incredibly accurate.. I rely on it for guide star acquisition 100% and it has never let me down... If it says there is a star brighter than Mag10 within the guider FOV, I know I can image that target..
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