Cloud Break Optics

Oxygen III Narrowband Filter

Oxygen III Narrowband Filter - Main image
Oxygen III Narrowband Filter - View 2Oxygen III Narrowband Filter - View 3Oxygen III Narrowband Filter - View 4Oxygen III Narrowband Filter - View 5Oxygen III Narrowband Filter - View 6
$165 $275 In stock

Category: Filters

Description

OIII 8nm Narrow Band filters isolate the doublet emission of doubly ionized Oxygen. After ionized hydrogen, this is the next most common emission when imaging nebulae. Doublet emission occurs at 495.9 and 500.7 nm.

Specifications

  • Parfocal for systems f/4.0 or slower
  • Transmitted wavefront better than 0.25 waves/inch
  • Parallelism: less than 30 arcsec
  • Made in America
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Customer Reviews (4.6 / 5 · 5 reviews)

Victoria E. ★★★★★

Installed this filter last night and the contrast on the Dumbbell Nebula was immediately better than my old dual-band setup. The 8nm bandpass really isolates the OIII signal without letting in too much sky glow.

Christopher T. ★★★★★

I was worried the 8nm bandpass would cut too much signal, but it really brings out the faint OIII detail in my nebula shots without washing out the stars. Works perfectly with my standard camera setup so far.

Penelope ★★★★★

Swapped this in on my rig last clear night and the 8nm bandwidth made a huge difference on the Veil—the doublet really pops now. Star shapes stayed tight even at f/5, which I wasn't completely expecting.

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