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Topics posted by Ian McCallum
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- 21 replies
- 720 views
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Wratten Filters for CA Correction in Achromats? 1 2 3 4
By Ian McCallum, in Getting Started With Observing
- 97 replies
- 6,587 views
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- 1 reply
- 463 views
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- 0 replies
- 463 views
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- 0 replies
- 163 views
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- 7 replies
- 431 views
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S Shaped Chain Of Bright Stars Near Orion's Belt?
By Ian McCallum, in Getting Started With Observing
- 21 replies
- 1,560 views
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- 0 replies
- 268 views
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- 2 replies
- 1,659 views
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- 7 replies
- 511 views
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- 4 replies
- 512 views
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- 19 replies
- 1,055 views
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- 16 replies
- 766 views
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- 13 replies
- 1,261 views
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- 5 replies
- 501 views
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- 11 replies
- 514 views
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- 6 replies
- 528 views
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- 33 replies
- 1,326 views
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- 6 replies
- 853 views
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- 2 replies
- 294 views
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- 0 replies
- 323 views
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- 41 replies
- 1,864 views
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- 1 reply
- 226 views
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- 0 replies
- 350 views
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M31 Last Night - 27th Sept 2022.
By Ian McCallum, in Imaging - Image Processing, Help and Techniques
- 0 replies
- 535 views