Selling brand new Cemax HA optimized 25mm eye piece by Coronado (enhances solar contrast). This EP was purchased as part of a set for use with my new f/25 system by mistake (too powerful for my system). Specifically designed for the faster Coronado type filters typically used on faster instruments, it would also compliment a high-end slower system that can handle the higher power. At 25mm, I almost kept this one for my f/25 system (very close). Anyway, selling for $100 shipped (CONUS). Many thanks for consideration!