Successfully achieving focus & noting the focal point on Sky Watcher Equinox Pro 80mm OTA on Manfrotto mount with QHY10 camera and TS off axis guider/flip mirror 15/8/2019

Sky was poor again tonight – largely clouded out except for a bright full Moon which shone through the cloud and one or two visible stars – including one very bright one almost directly overhead which successfully provided a bright point for me to use to focus my Sky Watcher Equinox Pro 80mm OTA/QHY10 camera/TS off axis guider/flip mirror 15/8/2019. Previously I had got sort of close to focus using a chimney on neighbour’s house but there is nothing like a star to do this properly. I tried a Bahtinov mask after getting closest focus by eye but for some reason I could not get that to show the spikes tonight….not sure why….something else to address on another day! Nevertheless, the focus I achieved tonight was sufficient to take a reasonable picture of the Moon – my first ever “proper” picture of a celestial object using a telescope with attached camera, apart from some photos taken with hand held smart phone at eyepiece in past.

With the TS OAG/Flip mirror between telescope and QHY10 camera, the focus point was noted to 15.5mm on the scale on the focuser of the Sky Watcher Equinox Pro 80mm OTA.

Andy

Screenshot from Nebulosity 4 showing the star focused on the QHY10 camera sensor:     

 

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