Desperate need to increase my scope-fund requires me to consider selling my coveted HA filter system. These filters have received fantastic reviews and really are amazing for solar viewing and photography / CCD imaging (ref Coronado web page for details). This system has been upgraded with the 15mm ERF (prefilter) enabling use of scopes with focal length of up to 1500mm. While the less expensive $2500 system came standard with a 10mm ERF (<1000mm FL), a 30mm is available for use with SCT's and bigger scopes up to 3000mm FL. This mint condition system has been handled like a vial of plutonium. Optics have never been touched and remain in flawless, pristine condition. Performance is every bit as advertised. Best offer will get the call. Many thanks for consideration.