OWL Astronomy

OWL Astronomy Products
Eyepieces, Telescopes, Binoculars, Microscopes
Lumicon Nebula Filters




Lumicon Nebula Filters

Considered the world's best.

These Lumicon filters reject man-made and natural light pollution. Mercury light pollution occurs at 365, 405, 436, 546, 577, and 617nm. High-pressure sodium street lights emit at 570, 583, 600, and 617nm. Natural airglow occurs at 558 and more weakly at 630nm. There is a window of greatly reduced light pollution from 440nm (blue) to 540nm (green). This window includes the important hydrogen-Beta line at 486nm, the two ionized oxygen lines at 496 and 501nm, and the two comet (cyanogen) lines at 511 and 514nm. Also important, at least photographically, is the red hydrogen-Alpha line at 656nm.

The Lumicon Deep Sky Filter has a wide 90-100nm band pass for most of this range (441-535nm) to yield maximum transmission of light from stars and galaxies while rejecting much of the light pollution and airglow light. The UHC Filter has a narrow 22nm band pass through 484-506nm. The OIII Filter has a very narrow 11nm band pass for 495-501nm, and the H-beta Filter has the narrowest band pass of all - only 8nm centered at 486nm. The narrower the band pass, the higher the rejection of light pollution and the blacker the skies. However, a narrower band pass also means fainter star images. Nevertheless, the Deep Sky Filter has high transmission for the photographic red nebula emission lines.

Because of the large variety of filter types and sizes, we cannot possibly keep all versions in stock. We always have the most popular ones in stock and can quickly drop-shop anything that is not in stock.

The Deep Sky Filter is Lumicon's most popular nebula filter. It blocks all high and low pressure mercury and sodium vapor lamp light, neon lights and airglow, while transmitting the rest of the visible spectrum. Visually, the Deep Sky Filter enhances contrast of nebula under both light-polluted and dark skies. The Deep Sky Filter also passes infrared light, making it an excellent filter for photographing deep space objects through light-polluted skies. Recommended for telescopes 3 inch aperture and larger.

To ensure the highest quality of your filter, the strictest quality control standards are employed throughout Lumicon's production process. Each Lumicon Deep Sky Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the H-Alpha, H-Beta and OIII emission lines.

1.25 inch Deep-Sky Filter

Price: $99.95.
 

2 inch Deep-Sky Filter

Price: $199.95.
 

SCT Rear Cell Deep-Sky Filter

Price: $199.95.
 
This Lumicon filter is the ULTIMATE nebula filter. The original Lumicon Ultra High Contrast Filter is a narrow-band nebula filter unbeatable for revealing nebulosity. This achievement in performance is attributed to exclusively designed coatings that isolate the two doubly ionized oxygen lines (496 and 501nm) and the H-beta line (486nm) emitted by planetary and most emission nebulae. The result is superb views of the Orion, Lagoon, Swan and other extended nebulae. You can finally see the North American Nebula visually. This filter is especially useful under dark skies where the faint nebulosity stands out in vivid contrast to the dark sky. Best for telescopes 8" or larger in aperture.

To ensure the quality of your filter, the strictest quality control standards are employed throughout the production process. Each Lumicon Ultra High Contrast Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the primary emission lines.

1.25 inch UHC Filter

Price: $99.95.
 

2 inch UHC Filter

Price: $199.95.
 

SCT Rear Cell UHC Filter

Price: $199.95.
 
This famous Lumicon OIII narrow band-pass filter isolates just the two doubly ionized oxygen lines (496 and 501nm lines).These lines are emitted by diffuse, planetary and extremely faint nebulae. Thus, these faint objects become much more visible against the blackened background of space. The Lumicon Oxygen III Filter produces near-photographic views of the Veil, Ring, Dumbbell and Orion nebula, among many other objects. Performs best under both light-polluted and dark skies. You will be amazed at what the OIII filter allows you to see! Best for telescopes 8" or 10" or larger in aperture.

To ensure the quality of your filter, the strictest quality control standards are employed throughout the production process. Each Lumicon Oxygen III Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the primary emission lines.

1.25 inch Oxygen III Filter

Price: $99.95.
 

2 inch Oxygen III Filter

Price: $199.95.
 

SCT Rear Cell O-III Filter

Price: $199.95.
 
This Hydrogen-beta filter is nicknamed the "Horsehead Nebula filter". The Lumicon H-Beta Filter isolates only the hydrogen-beta line of the spectrum (486nm) in a narrow pass-band just 9 nm wide. This is the least of any nebula filter. The result is extreme contrast between the black background of space and the delicate Hydrogen - Beta emission of extended nebulae. Now you can view extremely faint, special objects such as the Horsehead, Cocoon and California Nebulae. In many cases, the Lumicon H-Beta Filter is the ONLY way to view these objects. A transparent sky, a 8" or larger telescope, and the Lumicon H-Beta Filter, will tremendously aid in viewing those nearly impossible objects.

To ensure the quality of your filter, the strictest quality control standards are employed throughout the production process. Each Lumicon Hydrogen-beta Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the primary emission line.

1.25 inch Hydrogen-Beta Filter

Price: $99.95.
 

2 inch Hydrogen-Beta Filter

Price: $199.95.
 

SCT Rear Cell H-Beta Filter

Price: $199.95.
 
The Lumicon Night Sky Hydrogen-alpha is primarily a filter used for photography of faint emission nebula. It may also be used visually with large telescopes on faint nebula. It reaches a peak of almost 100% transmission just before the hydrogen-alpha line at 656nm and then continues into the near infra-red. If you need to have an image with no infra-red component, you would need to use an infra-red blocking filter with this filter.

CAUTION: This filter is NOT intended for looking a the sun in any fashion. Use of this filter on the sun may result in damage to your eyes or telescope. It is for photography of faint nebula only.

1.25 inch Night Sky Hydrogen-Alpha Filter

Price: $79.95.
 

2 inch Night Sky Hydrogen-Alpha Filter

Price: $99.95.
 
This filter is just about essential for color photography of deep-sky objects using CCD/Digital cameras. It also provides better photos for black and while photos.

This IR blocker filter passes all light except for the IR (infrared) and UV (ultraviolet). While these wave lengths are invisible to the human eye, they are very photographically active. All CCD/Digital cameras are very sensitive to IR. If you do not have an IR filter in the line and try to do tri-color photographs, the IR is passed by many of the filters of various colors. A blue filter that passes IR will end up with a much less saturated photo because the blue will be contaminated with the IR. In addition any telescope with a lens will not focus the IR at the same point as the visible light. This results in a out of focus blur on those objects that have an IR component.

1.25 inch IR Blocker Filter

Price: $69.95.
 

2 inch IR Blocker Filter

Price: $99.95.
 


Last Updated March 4, 2011