A complete Hydrogen alpha / telescope system includes:
Infrequently used DayStar 0.75 Angstrom ATM filter, checked by Del Woods two years ago, and in perfect working order. Del stated unit is closer to 0.7 Angstroms. Ideal pass band for both surface detail and prominence viewing. Comes with custom adaptors for 2" focusers and eyepieces, plus standard 1.25" and SCT adaptors.
Custom 4" ERF in machined cell fitted for telescope below.
Standard 2.5" SCT ERF. Adaptor ring for C-8 with Losmandy dovetail.
Custom 4" f/13 achro refractor OTA optimized for use with above system and a binoviewer (bino shown in photo but not included).
AstroPhysics 2x barlow/telecentric system; optimum for full aperature viewing.
New price for all the above would be over $4600. A Coronado SM 90/BF30 costs $5800.
$3100 OBO includes shipping and insurance in conus. Payment by USPS money order or bank draft.
Thanks for looking.