Selling my Like New 18mm Coronado CEMAX (Contrast Enhanced) eyepiece for S$125 only (new price is US$129 plus shipping). The CEMAX eyepieces are designed to optimize hydrogen alpha solar viewing, they are fully multicoated on all surfaces (including all cemented surfaces, not just the air to glass surfaces) with specially-formulated coating materials that maximize the contrast in the H-alpha passband region. This improves the appearance of subtle solar details by eliminating residual internal reflections and scattered light near the solar disk.
This eyepiece is NOT a hydrogen alpha solar filter and MUST be used in conjunction with a separate hydrogen alpha solar filter to avoid the possibility of instant and permanent eye damage!
Selling because I prefer the wider field of view with my Pentax 14mm XL on the PST.
thanks,
Arief