John Whitehouse
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Posts posted by John Whitehouse
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Will do next week Michael and thanks for your interest.
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Thanks for your opinions but unfortunately I took this image of Sirius on an old IPad and duplicated it by photographing it off the screen.
When eventually the clouds disappear, I shall submit an accurate reproduction.
Many thanks for your interest and time.
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I seem to have developed a problem which I don’t understand which is becoming more regular as I approach my 79 th. birthday and I attach a recent image of Sirius as an example.
My equipment:
Celestron 14” Edge HD, 0.7 Reducer, Off Axis Guider, CGX mount, ASIR AIR Plus, ZWO ASI071MC Pro
any suggestion would be appreciated.
Imaging problem
in Imaging - Discussion
Posted
Thanks for interest already shown and I’m glad to report the problem was CHRONIC collimating which was established by purchasing ‘Bobs Knobs’ . The enclosed leaflet suggested an initial visual check through the front from a distance of 5-10 metres and it then became very obvious. I then took the decision to remove the secondary lens and the mis-alignment was very evident. I then used a micrometer and levelled it to +/- 0.02mm. Eureka