Amazing Sky by Alan Dyer

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IC 4665 in Ophiuchus (200mm 6DII).jpg

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IC 4665, the large and sparse open star cluster in Ophiuchus above the star Beta Ophuichi, aka Cebalrai. This cluster stands out well when scanning with binoculars, but is too large and sparse to be a good target for most telescopes. The telesphoto lens used here provides a field of view similar to binoculars.

This is a stack of 6 x 2-minute exposures with the 200mm lens at f/2.8 and Canon 6D MkII at ISO 800.
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© 2019 Alan Dyer
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Star Clusters, NGC/IC Objects
IC 4665, the large and sparse open star cluster in Ophiuchus above the star Beta Ophuichi, aka Cebalrai. This cluster stands out well when scanning with binoculars, but is too large and sparse to be a good target for most telescopes. The telesphoto lens used here provides a field of view similar to binoculars. <br /> <br /> This is a stack of 6 x 2-minute exposures with the 200mm lens at f/2.8 and Canon 6D MkII at ISO 800.