Extreme Filtration Gives Bolder Views of the Veil, Ring, and
Other Elusive Nebulas
You can’t turn up the luminosity on nebulas, but you can crank up
the contrast between them and the sky to reveal more of their wondrous
detail. Our Oxygen-III filter provides extremely selective filtration
to bring out elusive detail in diffuse and planetary nebulas. It does
so by transmitting close to 90% of the light corresponding to the two
oxygen-III spectral lines at 496nm and 501nm while completely blocking
virtually all other visible wavelengths.
The results are remarkable. You’ll see more detail than you ever
could before in nebular gems such as the Swan, Ring, Dumbbell, Helix,
and Eagle, to name a few. The O-III provides an even greater contrast
boost on some objects than the UltraBlock narrowband filter. And for
nebulas, every little bit helps! Try the O-III with a low-power 2"
eyepiece and take in the whole Veil Nebula. Wow! Due to the amount of
light blockage, the O-III filter is recommended for telescopes of 8"
aperture or greater, and for visual use only. It features the highest
quality optical glass in a double-threaded, anodized aluminum cell.
All filters come with the instruction manual and their individual
transmission characteristics.
Ši prekė į katalogą buvo įtraukta Penktadienis 04 rugsėjo, 2009.
