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Colorful Sunspot Using a Monochrome CCD, 



Colorful Sunspot Using a Monochrome CCD

Technical card

Resolution: 2941x1857

Date:Aug. 1, 2014

Time: 08:45

Frames: 2000

Focal length: 2600

Seeing: 4

Transparency: 8


This sunspot picture was captured in the early morning of August 1st with carbon fiber Astro-professional APO80/520 quintuplet telescope.

The right image was captured by Canon 6D with 2.5x barlow lense, to give a overview of the sun; the up-left image was captured using ASI120MM - 3.75µm - Mono Imager with 2.5x apo barlow (TS) to describe a sunspot cluster; the down-left image was captured by using a 5x apo barlow (TS) in order to give the most detailed feature of a single sunspot.

Although the Mono 120MM is a monochrome imager, I am able to obtain a false color image by using color-projection via PS. Yellow color corresponds to the brightest part; red color correlates to the middle bright area; and the dark blue color correlates to the darkest region of the imaged, i.e., usually the center of a sunspot. The finally false color sunspot looks like a true color image. I fond the projection approach is very helpful here.

The seeing is not bad in the morning and I was able to obtain a decent video using the small quintuplet apo. I am satisfied with this composed image, as you can even see the vivid sun surface flames aside from the sunspots.

A 1.25" fringe killer filter was used.



License: None (All rights reserved)


Colorful Sunspot Using a Monochrome CCD,