Compound image of the Sun taken in Ca K-line (343.4 nm) and H-alpha (656.3 nm) light

Equipment used:

A solar Quest Solar finder and tracker mount.

A Coronado CaK PST scope.

A Coronado Solarmax II 60 BF15 H-alpha scope.

An Altair 462M2 monochrome CMOS camera.

With each scope in turn, two overlapping SER files were captured with AstroDMx Capture. 1000-frame SERs for Ca K-line and 1500-frame SERs for H-alpha

The best 90% of frames in each SER file were stacked in Autostakkert!4. The overlapping pairs of images were stitched in MS ICE, wavelet processed in waveSharp and finished with Gimp and ACDSee.

The Ca K-line image and the H-alpha image were merged in Picture Window Pro before finishing in Gimp.

Click on an image to get a closer view

The Sun in Ca K-line and H-alpha light

Monochrome image

Steve Wainwright and Nicola Mackin