Supplied with storage case., 'Box contents: O 1., 25-inch III narrowband filters with storage case 1.25 OIII Filter - 10 nm Narrowband. For extreme contrast enhancement when observing nebulae. The OIII filter is especially useful for planetary nebulae The O-III narrowband filter is specially designed for the observation of gas and planetary nebulae. NEEWER Lunar Filter Kit with 3 ND Lunar Filters (ND0.9 ND0 1.25 Inch Astronomical Filter Sky-Watcher Moon Filter 1.25" 20405 | Grovers Optics Skywatcher O Iii Filter 1.25 Inches Black And Silver These Available in two sizes, threaded to fit either standard 1., 25” or 2” astronomical eyepieces. Sky-Watcher Moon Filter 1.25" 20405 | Grovers Optics With larger aperture telescopes, observers will have a better opportunity to identify nebulae objects in the deep sky. O-III filters work ideally with larger aperture telescopes in the 200mm and larger range.
