The ghostly wisp of a filament can just be seen in this image taken in CaK light using the Tal100R at 3300mm focal length with the homebrew CaK filter and the PGR Blackfly GigE IMX249 camera.

• Brierley Hill Solar 21 Feb 16 Blog feature AR12502 & AR12503 in CaK – 18th February
• Brierley Hill Solar 21 Feb 16 Blog feature AR12501 CaK 18th February
• Brierley Hill Solar 21 Feb 16 Blog feature CaK Full Disk 18th February
• Brierley Hill Solar 21 Feb 16 Blog feature AR12501 Ha 18th February
• Brierley Hill Solar 21 Feb 16 Blog feature Fine Filaments – 18th February
• Brierley Hill Solar 21 Feb 16 Blog feature AR12502 Ha 18th February
• Brierley Hill Solar 21 Feb 16 Blog feature AR12503 Ha 18th February
• Brierley Hill Solar 21 Feb 16 Blog feature Ha Full Disk 18th February

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