Optolong OIII 25nm Filter Takeaway Pager System ensuring secure handling during eyepiece

ensuring secure handling during eyepiece changes

QHYCCD PoleMaster Adapter – HEQ5 / Sirius EQ-G

This is brilliant for outreach

Precision off-band blocking

Optolong OIII 25nm Filter Takeaway Pager System ensuring secure handling during eyepieceThis premium Optolong Narrowband OIII filter is designed for nebula observation allowing 25nm bandwidth of light centred on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our