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Diffraction Spikes - Refractor

Started by rswaney, 12/28/2004 06:52PM
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Posted 12/28/2004 06:52PM Opening Post
Russ Swaney
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Join Date: Dec 2002

Location: Bedford Heights OH, US

Posts: 31

In the January 2005 issues of Sky & Telescoope, page 150 is a photo of the double cluster in Perseus taken with a "Astro-Physics 6-inch f/7 REFRACTOR".

Why do the stars have Diffraction Spikes? I thought you only got those with a central obstruction (spider)???

Thanks,
Russ
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Posted 12/28/2004 06:55PM #1
John Krawczyk
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Join Date: Jan 2004

Location: Crownsville MD, US

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Artistic effect. You take two peices of string and tape them in a cross pattern over the end of the dew shield. You either like them or you dont.
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John Krawczyk
Crownsville, MD

http://www.ardenastrophotography.com
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