billyharris72
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Topics posted by billyharris72
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How to interpret field curvature? [ED72 + OVL] 1 2
By billyharris72, in Getting Started With Imaging
- 28 replies
- 6,476 views
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- 4 replies
- 439 views
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Guiding issues with 130PDS and guidescope. Is an OAG a viable option?
By billyharris72, in Getting Started With Imaging
- 4 replies
- 594 views
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- 3 replies
- 11,868 views
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- 4 replies
- 1,366 views
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Can I use an UV/IR cut filter in front of my regular LRGB?
By billyharris72, in Getting Started With Imaging
- 0 replies
- 188 views
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A couple of questions / project ideas (photometry)
By billyharris72, in Observing and Imaging Double and Variable Stars
- 4 replies
- 783 views
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- 2 replies
- 293 views
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- 7 replies
- 424 views
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Why is spectral flux density calculated per unit wavelength?
By billyharris72, in Physics, Space Science and Theories
- 10 replies
- 2,295 views
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- 10 replies
- 875 views
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Image brightening at edge of field - any ideas why
By billyharris72, in Getting Started With Imaging
- 9 replies
- 887 views
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- 16 replies
- 8,413 views
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Another photometry query (calibration and air mass)
By billyharris72, in Observing and Imaging Double and Variable Stars
- 5 replies
- 657 views
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- 4 replies
- 1,557 views
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Crayford troubles - does this sound fixable?
By billyharris72, in Getting Started Equipment Help and Advice
- 2 replies
- 292 views
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- 10 replies
- 829 views
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- 5 replies
- 446 views
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- 10 replies
- 831 views
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- 12 replies
- 1,124 views
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- 8 replies
- 605 views
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- 12 replies
- 2,066 views
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- 4 replies
- 602 views
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- 2 replies
- 477 views
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- 14 replies
- 711 views
