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Topics posted by Ian McCallum
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- 21 replies
- 696 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
- 6,524 views
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- 1 reply
- 459 views
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- 0 replies
- 461 views
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- 0 replies
- 161 views
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- 7 replies
- 429 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
- 1,550 views
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- 0 replies
- 267 views
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- 2 replies
- 1,635 views
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- 7 replies
- 504 views
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- 4 replies
- 507 views
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- 19 replies
- 1,023 views
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- 16 replies
- 756 views
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- 13 replies
- 1,235 views
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- 5 replies
- 499 views
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- 11 replies
- 509 views
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- 6 replies
- 525 views
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- 33 replies
- 1,314 views
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- 6 replies
- 834 views
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- 2 replies
- 292 views
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- 0 replies
- 322 views
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- 41 replies
- 1,840 views
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- 1 reply
- 222 views
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- 0 replies
- 347 views
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M31 Last Night - 27th Sept 2022.
By Ian McCallum, in Imaging - Image Processing, Help and Techniques
- 0 replies
- 534 views