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Astrodon 50mm Dia. OIII Filter 3 nm FWHM

PRICE: 995.00

Astrodon 50mm Dia. OIII Filter 3 nm FWHM Description
Imaging with narrowband filters has become very popular. It is an ideal tool to observe structure in emission nebula because it produces very high contrast, and is a wonderful means to enjoy our hobby even when the moon is up.

The Astrodon OIII & SII filters have become the preferred choice of imagers for the following important reasons:

• Parfocal with all Astrodon LRGB, C, and H-alpha filters eliminating the need for refocusing.

• A very narrow 3 nm spectral bandwidth (full width at half maximum transmittance) produces excellent nebula detail while minimizing stars.

• Incredible blocking of light outside the bandpass to better than 0.0004% to achieve very high S/N and high contrast, even with a bright moon nearby.

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