John C
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Topics posted by John C
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- 21 replies
- 1,336 views
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What's the best way to image comet Catalina?
By John C, in Imaging - Widefield, Special Events and Comets
- 11 replies
- 1,307 views
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- 8 replies
- 2,606 views
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How can you measure the seeing in arc seconds?
By John C, in Getting Started General Help and Advice
- 6 replies
- 2,519 views
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- 6 replies
- 1,678 views
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- 4 replies
- 1,079 views