I am selling my Ha (H-Alpha) 12nm 1.25" Filter. I have been very happy with this filter, but just recently purchased some Astronomik Oii and Sii and it was not parfocal with these. I have since purchased and Astronomik Ha filter from a fellow Ice member, and so I am selling this one.
The Horsehead nebula attached was taken using this filter combined with RGB in my SBIG ST2000xm
Price is $80. Postage available at buyers expense.
Many thanks,
Andrew...
