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David Callejas

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January 20, 2019

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David Hoskin
Halifax, Nova Scotia, Canada

03/11/2022
10:00 am

Equipment Details:

White light image: Canon T3i DSLR with 1.5x Barlow, Celestron Omni 102mm f/6.5 refractor, alt/az mount.
Hydrogen alpha image: ZWO ASI290MM camera, Lunt 40mm Solar Telescope, SkyWatcher EQ6R Pro mount.

Post-processing Details:

White light image: Single frame was processed using IMPPG, Photoshop, and PhotoScape X. False color added using Photoshop.
Hydrogen alpha image: Best 330 frames of video stacked using AutoStakkert, sharpened and levels adjusted using IMPPG, final tweaks with Photoshop and Microsoft Photo.

Image Details:

The image on the left was captured using a white light solar filter. It shows the Sun's photosphere. Multiple sunspot groups are visible. The sunspot (AR2965) on the north east limb of the Sun is currently the most active sunspot. The image on the right was captured using a solar telescope that only passes hydrogen alpha wavelength light. It shows the Sun's chromosphere. Sunspots, plage, filaments and prominences are visible.

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January 20, 2019

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David Callejas

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About the Author:

David Callejas, Marketing Director, helps bring EarthSky's content to the world via online ads and other products. He creates strategies that help people around the world find us and appreciate the work we do. He helps manage the EarthSky Store and bring to you the new products that you love. He's the chief liaison between EarthSky.org and the world of commerce. All that, plus he helps post content and populate our pages on Facebook, Google+ and Twitter. Go David!