The H-alpha 7 nm Deep Sky Imaging Filter: The ideal raw material for image processing in the sRGB colour space is available with LRGB filter set and mono CCD camera.RGB-imaging allows equal weighting factors for each channel, very important for automated imaging.Suitable for deepsky and planetary CCD imaging.Work well with debayered monochrome CCD cameras.Gap between green and red filters serves to block out the primary Sodium light pollution line at 589 nm and improves colour balance and separation. OIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. This set divides the spectrum into its components red, green, blue and luminance. Suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants.They show great structural details, but have natural colours, looking like an RGB image. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. OIII emits 495.9 nm and 500.7 nm and it is a blue-green coloured filter. It is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 500 nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. This filter is an extra Narrowband OIII 6.5 nm filter. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula. Narrowband filter do not eliminate the effects of light pollution or increase the object’s brightness.Hubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula).Narrowband imaging with SHO set can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks.Use with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography.The SII-CCD 6.5 nm Deep Sky Imaging Filter: is an extra narrowband SII-CCD 6.5 nm filter (Sulphur II for CCD) is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 672 nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. This is a premier quality Seven (7) piece filter kit from premier specialist astronomy & astroimaging filter manufacturer Optolong. Please note this is a 2 inch diameter round mounted astroimaging set of filters to fit directly to all standard CCD 2 inch Colour Filter Wheels which are commonly used globally by nearly every major CCD Manufacturer globally. Optolong LRGB Ha, S2 & OIII Astroimaging Filter Kit – 2 inch
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