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T117 Wireless Restaurant Pager
and accessories
We consider the danger in the dark
You can select filters with 12nm or 6nm bandwidth (FWHM) for the three most important emission lines in astrophotography: oxygen (OIII)
Typical transmission over 95% at the H-beta line
Astronomik OIII Filter – High Contrast for Nebulae Observation Size:Astronomik OIII visual SC Rear Cell (2"/24 TPI) T117 Wireless Restaurant PagerAstronomik OIII Filter for Visual Observation of Nebulae The Astronomik OIII filter is specifically designed for the visual observation of gaseous and planetary nebulae. With its extremely narrow bandpass focused on the two OIII lines, it significantly enhances contrast, even in ideal viewing conditions. The Astronomik OIII filter is a must have tool for observing faint supernova remnants and planetary nebulae, often making the difference between
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