ToupTek Astro SHO Narrowband Filter Set

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

SHO filtros astronómicos imagem do produto

Narrowband filters isolate selected emission lines for monochrome deep-sky imaging and SHO channel capture.

ToupTek Astro SHO narrowband filters are precisely tuned to the three primary ionized emission lines of star-forming regions:

Hα (656.3nm)
SII (671.6nm)
OIII (500.7nm)

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

Technical Parameters

Size Especificações 36mm (unmounted) / 1.25" / 2"

Glass Thickness 2mm

Transmission >90%

Glass Material Quartz Glass

Frame Material Aluminum Alloy

OD Value ≥5.0

Transmission Ranges

SII Center Wavelength 671.6nm

Hα Center Wavelength 656.3nm

OIII Center Wavelength 500.7nm

Full Width at Half Maximum (FWHM)

36mm: Hα (4nm) / SII (4nm) / OIII (4nm)

1.25" & 2": Hα (7nm) / SII (7nm) / OIII (7nm)

Surface Treatment: Dual-side high-precision optical polishing

Coating Technology: IAD (Ion Assisted Deposition)

Coating System Design: AR anti-reflection coating + quartz glass + precision cut-off coating layer

Funcionalidades principais

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

SII SII Filter: Center wavelength 671.6nm, FWHM 4nm.
Supports ionized sulfur channel capture and structural contrast when combined with Hα.

Hα Hα Filter: Center wavelength 656.3nm, FWHM 4nm.
Hydrogen-alpha channel for nebula morphology.

OIII OIII Filter: Center wavelength 500.7nm (OIII emission line), FWHM 4nm.
OIII channel for high-energy excitation regions and blue-green emission structures.

*1.25-inch and 2-inch filters have FWHM of 7nm.

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

The coating stack combines single-side cut-off coating, front-surface AR coating, and edge blackening to reduce internal reflection and stray light.

All channel filters achieve OD≥5.0 cut-off depth to block non-target spectral ranges and reduce channel crosstalk.

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

36mm filters: Feature recessed black ring facing telescope for quick orientation identification
1.25" and 2" filters: Equipped with threaded aluminum frames for direct screw-in installation

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

36mm: Recommended for APS-C and smaller sensor formats

1.25": Recommended for 1-inch and smaller sensor cameras

2": Recommended for full-frame and smaller sensor cameras

Compatible with various brands of 7-position 36mm, 8-position 1.25-inch, and 5-position 2-inch motorized filter wheels.

Spectral Response Curves

Spectral Chart Reading Guide

Horizontal axis represents wavelength (unit: nm), vertical axis represents transmission (percentage %)
Blue line: SII (672.4nm) Red line: Hα (656nm) Green line: OIII (500.7nm)
Emission nebula signal bands are primarily located at 656nm (Hα), 500.7nm (OIII), and similar wavelengths
Light pollution peaks typically occur near 540nm and 590nm (sodium/mercury lamp bands)

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

IC5070

Photographer: voice

Telescope: Sky-Watcher

Mount: UMI

Camera: ToupTek Astro ATR2600M

Filters: ToupTek Astro 36mm LRGB&SHO

Exposure: Hα: 30×600s ; SII: 30×600s ; OIII: 30×600s

Total exposure time: 15 hours

IC443

Photographer: voice

Telescope: Sky-Watcher F3.4

Camera: ToupTek Astro ATR2600M / ATR2600C

Mount: UMI

Filters: ToupTek Astro 36mm HSO

Processing: Narrowband composite using HSO channel mapping

Total exposure time: 20 hours

NGC2237

Photographer: 原上行川

Telescope: Askar SQA55

Camera: ToupTek Astro ATR2600M

Mount: iOptron HAE16C

Filters: ToupTek Astro 36mm HSO

Wireless Controller: StellaVita

Exposure: Hα: 71 ; OIII: 63 ; SII: 49

Total exposure time: 15 hours

M16

Photographer: Yahushua

Telescope: Askar 130HNT28-AL

Camera: ToupTek Astro ATR585M

Mount: iOptron CEM26

Guide Camera: G3M2210M

Filters: ToupTek Astro 1.25" HSO

Total exposure time: 7 hours

NGC6357

Photographer: voice

Telescope: Sky-Watcher

Camera: ASI2600M

Filters: ToupTek Astro 2" HSO

Mount: UMi 17

Exposure: Hα: 36×600s ; SII: 36×600s ; OIII: 36×600s

Total exposure time: 18 hours

Instalação Guide

36mm Unmounted Filters

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

1.25" and 2" Filters

Screw directly into the filter wheel.

Garantia e serviço

Quality Assurance Testing

Every filter undergoes spectral testing before shipment to verify optical performance consistency.

Warranty Policy

filtros SHO da ToupTek Astro permite trocas precisas de filtros, imagem LRGB ou de banda estreita e resultados consistentes de céu profundo.

Suporte técnico

For assistance, please contact our support team:
ToupTek Astro Technical Support

Notas importantes

Color Variations: Filter coating colors may appear different under various lighting conditions and viewing angles—this is a normal optical phenomenon.

Produto Improvements: Specifications and appearance may be updated as part of product refinement. Refer to actual delivered goods.

ToupTek Astro SHO Narrowband Filter Set