Meade Series 4000 Narrowband Meade Nebular Filters:
A remarkable advance for the serious visual observer of emission nebulae.
Meade Narrowband Filters #908 N zero-in on the three most important visible wavelengths emitted by deep-space emission nebulae: the two spectral lines of Oxygen III at 496 and 501nm and the Hydrogen Beta line at 486nm. Virtually all unwanted city light emissions are rejected by factors of 99.9+%.
Because of its narrow bandpass characteristics, the Meade Narrowband Nebular Filter achieves striking levels of contrast between the nebula itself and the surrounding dark-sky environment: objects such as the Orion Nebula (M42), the Lagoon Nebula (M8), and the Omega Nebula (M17) are observed as they would normally appear through telescopes of several inches larger aperture.
Tenuous, faint outer extensions of these objects now become readily observable- often to the point where the visible mass of the nebula is more than doubled in diameter. Planetary nebulae such as the Ring Nebula (M57), the Dumbbell Nebula (M27), and the Saturn Nebula (NGC 7009) similarly display dramatically-heightened levels of contrast and observable detail. Faint, insignificant patches of nebulosity that heretofore were near the limit of observability are now viewed with ease.
Two models of Narrowband Nebular Meade Filters are available:
Meade Series 4000 Broadband Nebular Filter #908N (item 07525):
Threads into the barrels of all Meade 1.25" eyepieces and most other 1.25" brands.
# 908-N filter's Clear aperture: 26mm.
Features of Meade Series 4000 Narrowband Nebular Filters 908 N:
- Narrow bandpass characteristics
- Virtually all unwanted city light emissions are rejected by factors of 99.9+%
- Striking levels of contrast between the nebula itself and the surrounding dark-sky environment
- Meade Series 4000 Narrowband Nebular Filter