₹48,000.00INR
The Optolong Improved NB SHO 6.5nm Narrowband Filter Kit is a professional-grade SHO narrowband filter set designed for advanced deep-sky astrophotography and nebula imaging. Manufactured by Optolong, this premium kit includes SII 6.5nm, H-Alpha 7nm, and OIII 6.5nm filters, optimized for use with astronomical monochrome cooled CCD/CMOS cameras and modified DSLR cameras.
This SHO narrowband kit enables astrophotographers to capture each emission channel separately and then combine them using the famous Hubble Palette (SHO mapping: SII → Red, H-Alpha → Green, OIII → Blue) through astronomical image processing software. The result is highly detailed, scientifically accurate, and visually striking Hubble-style nebula images, even from light-polluted skies.
The Optolong SHO 6.5nm filter kit is specifically engineered for single-channel narrowband imaging, isolating key nebular emission lines while strongly suppressing artificial light pollution and atmospheric skyglow. Each filter in the kit targets a precise wavelength with extra-narrow bandwidth, dramatically enhancing contrast, faint signal detection, and structural clarity in emission nebulae, planetary nebulae, and supernova remnants.
Central wavelength centered near 672nm
Extra-narrow 6.5nm bandwidth
Designed for nebula observation
Strongly blocks mercury vapor, sodium street lights, and skyglow
Enhances faint sulfur structures often invisible in broadband imaging
Popular and highly effective 7nm H-Alpha bandwidth
Passes hydrogen emission at 656nm
Excellent suppression of artificial light pollution
Delivers maximum contrast and reveals fine nebular detail
Ideal choice for high-contrast narrowband astrophotography
Extra-narrow 6.5nm bandwidth centered at 500nm
Isolates OIII emission lines
Blue-green spectral response
Widely used for planetary nebulae and supernova remnants
When combined with H-Alpha, produces images with natural RGB-like color balance
✔ Higher contrast & finer nebula detail
✔ Significant reduction in background noise
✔ Improved signal-to-noise ratio for faint nebulae
✔ Enables full Hubble Palette (SHO) image processing
✔ Optimized substrate & upgraded coatings for greatly reduced star halos, especially in OIII
✔ Ideal for urban, suburban, and dark-sky imaging
Optolong’s improved narrowband filters benefit from state-of-the-art coating techniques:
Multi-layer anti-reflection coatings
Non-cemented optical substrate design
Ion-assisted deposition coating technology for superior durability and scratch resistance
Stable CWL (Central Wavelength) with no shift due to temperature changes
Planetary rotation coating system ensures coating uniformity, high pass-band transmission, and deep off-band optical density
These innovations guarantee optical precision, long-term performance, and professional imaging results.