Optolong 3nm SHO S-II/H-Alpha/O-III Filters - 2" vendor-long-perng While this may be acceptable

While this may be acceptable for some visual observing

Made in Taiwan

Not every mount is capable of remote observing operation

Binocular straps included

Optolong 3nm SHO S-II/H-Alpha/O-III Filters - 2" vendor-long-perng While this may be acceptableOptolong SHO 3nm Narrowband Filters Introduction Optolong SHO 3nm filter kit includes SII 3nm, H Alpha 3nm, and OIII 3nm narrow band filters, for use with astronomical monochrome cooling CCD and modified DSLR imaging in each single channel. Corresponding with RGB channel (HA, OIII, SII), photographers can also process the data to produce Hubble palette images. The narrowband S II 3nm filter (Sulfur II for CCD) is designed for nebula observation