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
- 6,465 views
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- 4 replies
- 438 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
- 582 views
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- 3 replies
- 11,785 views
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- 4 replies
- 1,356 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
- 187 views
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A couple of questions / project ideas (photometry)
By billyharris72, in Observing and Imaging Double and Variable Stars
- 4 replies
- 780 views
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- 2 replies
- 293 views
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- 7 replies
- 416 views
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Why is spectral flux density calculated per unit wavelength?
By billyharris72, in Physics, Space Science and Theories
- 10 replies
- 2,270 views
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- 10 replies
- 865 views
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Image brightening at edge of field - any ideas why
By billyharris72, in Getting Started With Imaging
- 9 replies
- 882 views
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- 16 replies
- 8,383 views
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Another photometry query (calibration and air mass)
By billyharris72, in Observing and Imaging Double and Variable Stars
- 5 replies
- 650 views
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- 4 replies
- 1,546 views
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Crayford troubles - does this sound fixable?
By billyharris72, in Getting Started Equipment Help and Advice
- 2 replies
- 291 views
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- 10 replies
- 825 views
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- 5 replies
- 446 views
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- 10 replies
- 827 views
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- 12 replies
- 1,123 views
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- 8 replies
- 604 views
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- 12 replies
- 2,059 views
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- 4 replies
- 601 views
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- 2 replies
- 476 views
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- 14 replies
- 708 views
