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Home > Classifieds > Astromart Classifieds > Filters > Classified #276576

For Sale: Imaging filters: H-alpha, IDAS LPS, O-III, ND

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All must go, I switched from 1-1/4" to a 2" CCD filter system!

Custom Scientific Hydrogen-Alpha filter (H-alpha) 1-1/4" threaded cell
656.3, 3.0nm bandpass
Please note that this is not the less expensive 4.5nm or 6.0nm bandpass!!!! This is the good one!
Excellent condition, no scratches or blemishes.
H-Alpha 656.3/3.0 1-1/4". Hydrogen-alpha 3.0nm passband. This filter is designed for non-solar imaging, and is used to image deep-sky objects that emit in the h-alpha passband.

***SOLD*** IDAS Light Pollution Suppression (LPS) Filter -1-1/4" threaded cell
LPS-P28.6 28.6mm (1-1/4") LPS filter (formerly part #LPS-P31.7)
Excellent condition, no scratches or blemishes.
The IDAS Narrow Band Nebula Photo-Visual (NBN-PV) filter is a new filter design using the IDAS-unique Multi-Bandpass Technology (MBT). This allows the creation of a filter with very narrow passbands around both the H-Beta / O III emission lines, and the H-alpha / N II / S II emission line groups. This combines the high contrast views of narrowband filters with the convenience (and economy) of covering all of the important nebula emission lines in a single filter. The resulting filter is great for visual use or monochrome imaging of emission nebulae.

Meade Oxygen III filter - 1-1/4" threaded cell
This filter passes the Oxygen III emission line while blocking other wavelengths.
From the Meade web site:
Meade Oxygen-III (O-III) nebular filters provide an extraordinary level of nebular filtration on diffuse and planetary nebulae. Observations of these nebulae in a city environment with the O-III filter often yield more image contrast than observations of the same objects in a dark-sky setting without the filter.
The O-III filter extracts more than 80% of the light emanating from the two oxygen-III spectral lines at 496 and 501nm. Objects such as the Omega (Swan) Nebula (M17) in Sagittarius, the Orion Nebula (M42) in Orion, the Helix Nebula (NGC 7293) in Aquarius, and the Eagle Nebula (M16) in Serpens are revealed in dramatically increased detail. Meade 60-layer interference coating technology isolates the desirable O-III lines, while attenuating other spectral lines virtually to zero.
Excellent condition, no scratches or blemishes.

Meade Series 4000 ND-96 (0.9) 1-1/4" threaded cell
A neutral density filter for both visual and photographic use on bright objects like the moon.
Excellent condition, no scratches or blemishes.

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