Optolong SHO-3nm Narrowband Filters Introduction

Optolong SHO-3nm filter kit includes SII 3nm, H-Alpha 3nm, /*C*and*C*/ OIII 3nm narrow band filters, generally working with astronomical monochrome cooling CCD /*C*and*C*/ modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can /*C*process*C*/ Hubble images by astronomical post processing software. 

Extra narrowband SIICCD3nm filter  (Sulful II for CCD) is designed for nebula observation allowing 3nm bandwidth of light  centered on a wavelength of 672nm through, /*C*and*C*/ reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, /*C*and*C*/ both high /*C*and*C*/ low pressure sodium vapor lights /*C*and*C*/ the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)

H-Alpha 3nm filter is the popular narrowband filter allowing 3nm bandwidth of light centered on a wavelength of 656nm through, /*C*and*C*/ reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, /*C*and*C*/ both high /*C*and*C*/ low pressure vapor lights /*C*and*C*/ unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow). Better choice of narrowband H-Alpha astrophotographer filter for highest contrast /*C*and*C*/ revealing subtle nebula details. 

Extra narrowband OIII-CCD 3nm filter is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission line, /*C*and*C*/ reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, /*C*and*C*/ both high /*C*and*C*/ low pressure sodium vapor lights /*C*and*C*/ the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow).

OIII emits 495.9nm /*C*and*C*/ 500.7nm /*C*and*C*/ it is a blue-green colored filter. Many of images of planetary nebula /*C*and*C*/ supernoval remnants are taken only with H-Alpha /*C*and*C*/ OIIII filters. They show great structural details, but have natural colors, looking /*C*like*C*/ an RGB image.

Features:

Give you higher contrast /*C*and*C*/ greater detailed viewing;

Decrease background noise /*C*and*C*/ improve the contrast of objects;

Increase the faint nebula signal /*C*and*C*/ make i tto be brightness;

With narrow band fitlers kit, you are able to /*C*process*C*/ a hubble image;

Through the optimization of the sustrate /*C*and*C*/ upgrading of coating technology.

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