Antlia ALP-T Dual Band SII & Hb 3.5nm 2 Filter Supply
Description
Antlia ALP-T Dual band 3.5nm SII&Hb 2 Filter
Product Details
The ALP-T dual band 3.5nm SII&Hb filter is a dual narrowband filter, which lets the deep red Sulfur-II 672.4nm and the blue Hydrogen-Beta 486.1nm lines through and is primarily engineered for color cameras to assist astrophotographers taking deep sky images with superior SNR (Signal to Noise Ratio). With an FWHM half-bandwidth designed at 3.5nm and achieving an optical density (OD) of 4.5 on unwanted wavelengths, it works strongly in blocking light pollution, moonlight, and airglow, leading to enhanced contrast in nebulae images by effectively passing the SII and H-beta emission lines signal only.
It is a significant addition to the popular Antlia ALP-T dual-band Ha&OIII filter and enables false-color images and narrow-band nebula images using OSC. When capturing data with this filter, the nebulae are recorded with high signal-to-noise ratios and greater contrast than without it.
The combination of these two dual band Ha&OIII and SII&H-beta filters allows extreme narrow-band images with OSC cameras by capturing the spectral data from 4 channels i.e. Ha OIII SII Hb. The spectrum of these four channels can be separated and recombined into various color palettes in your post-processing. The resulting images can be used for luminance contrast enhancement of traditional RGB-balanced images or the creation of images in various popular false-color palettes such as H-O-Hb, S-H-O, H-S-OHb, H-O-O, etc.
The advanced multi-coatings on Antlia ALP-T dual-band filters effectively isolate the red, Ha line, blue-green, OIII line, deep red SII, and the blue H-beta lines from emission nebulae, with almost total suppression of optical density (OD)4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that both the ALP-T dual band Ha&OIII version and SII&Hb version create a superior signal-to-noise ratio and better contrast in your OSC images whether used in urban or rural areas, making them excellent choices for astrophotographers aiming to capture high-quality and more detailed celestial images. p>
Main features and application:
- Passes SII 672.4nm and H-Beta 486.1nm lines
-
- Capturing of the two main emission wavebands in the deep red and blue at the same time
-
- Ultra FWHM 3.5nm design allows for increasing exposure time and capturing detailed nebulae signal
-
- Designed to be used primarily with color cameras to capture cleaner data or used as Luminance filter mono cameras to save imaging time
-
- Recommended to be used with ALP-T Dual Band Ha&OIII filter to create images with better
-
- SNR( signal-to-noise) and better isolation between the 4 channels
-
- Suppression of optical density (OD)4.5 on unwanted wavelengths improves SNR( signal-to-noise)
-
- Near IR (NIR) is blocked up to 1100nm
-
- Ideal flat-top and moderate bandpass reducing spectrum downshifts
-
- Recommended to use the filter with optics f-ratios slower than f 4 for best performance, for optics faster than f 4, pre-shifted highspeed version is a better choice
-
- Ion Gun Assisted Deposition of double-sided multi-layer coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter
-
- Halo suppression anti-reflective coating is used to minimize halo and internal reflections
-
- Designed to suppress artificial lighting from Bortle scale 1 to Bortle scale 8
-
- Blackened edges of unmounted sizes to minimize internal reflections
-
- Antlia s ever-trusted coating technology makes filter durability very reliable
-
- While primarily designed for use with color cameras, the filter is also highly effective with monochrome cameras to save imaging time
-
Technical Data:
- FWHM: 3.5nm +0.5 -0.5nm
-
- CWL (Central Wavelength):
- Sulfur-II: 672.4nm
-
- Hydrogen-Beta: 486.1nm
-
-
- Peak Transmission:
- Sulfur-II: 90%
-
- Hydrogen-Beta: 85%
-
-
- Blocking: ≥OD4.5 @ 300-1100nm
-
- Filter Thickness: 2mm+ -0.05mm
-
- Basic Substrate Optical, Single Non-glued substrate
-
- Surface Quality S D (scratch dig)= 60 40 (Refer to MIL-O-13830)
-
- Transmitted Wavefront Lambda 4 or better. Parallelism less than 30 arcsec
-
Filter Ring:
- 2’’ Mounted (M48*0.75 thread)
-
- Ultra-thin filter cell to minimize vignetting by maximizing possible clear aperture
-
- Black Anodized Finish
-
- Laser Engraving, No Fading
-
Not Recommended:
- Solar Observing and imaging
-
- Night visual observation
-
- DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS. Serious eye damage will result if you fail to observe the warning.
-
Technical Specifications
Antlia ALP-T dualband 3.5nm SII&H-beta Filter
Sulfur-II
Hydrogen-Beta
FWHM
3.5nm +0.5 -0.5nm
3.5nm +0.5 -0.5nm
CWL (Central Wavelength)
672.4nm
486.1nm
Peak Transmission
90.00%
85.00%
Blocking
≥OD4.5 @ 300-1100nm
Filter Thickness
2mm+ -0.05mm
Basic Substrate
Optical, Single Non-glued substrate
Surface Quality
S D (scratch dig)= 60 40 (Refer to MIL-O-13830
Transmitted Wavefront
Lambda 4 or better.
Parallelism
less than 30 arcsec
Filter Ring
2’’ (M48*0.75)
Filter Ring:
2’’ (M48*0.75)
Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture
Black Anodized Finish
Laser Engraving No Fading
In the Box
- Antlia ALP-T Dualband 3nm Ha&OIII Filter 2
-
Warranty & Manual
Antlia 3-Years Warranty against Delamination
Additional Information
Title
Default Title
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Original price was: $525.00.$157.50Current price is: $157.50.
Explore Scientific Nebula Filter S-II 1.25-inch 6.5nm (310125) Online
Original price was: $230.00.$115.00Current price is: $115.00.
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Product Details
The ALP-T dual band 3.5nm SII&Hb filter is a dual narrowband filter, which lets the deep red Sulfur-II 672.4nm and the blue Hydrogen-Beta 486.1nm lines through and is primarily engineered for color cameras to assist astrophotographers taking deep sky images with superior SNR (Signal to Noise Ratio). With an FWHM half-bandwidth designed at 3.5nm and achieving an optical density (OD) of 4.5 on unwanted wavelengths, it works strongly in blocking light pollution, moonlight, and airglow, leading to enhanced contrast in nebulae images by effectively passing the SII and H-beta emission lines signal only.
It is a significant addition to the popular Antlia ALP-T dual-band Ha&OIII filter and enables false-color images and narrow-band nebula images using OSC. When capturing data with this filter, the nebulae are recorded with high signal-to-noise ratios and greater contrast than without it.
The combination of these two dual band Ha&OIII and SII&H-beta filters allows extreme narrow-band images with OSC cameras by capturing the spectral data from 4 channels i.e. Ha OIII SII Hb. The spectrum of these four channels can be separated and recombined into various color palettes in your post-processing. The resulting images can be used for luminance contrast enhancement of traditional RGB-balanced images or the creation of images in various popular false-color palettes such as H-O-Hb, S-H-O, H-S-OHb, H-O-O, etc.
The advanced multi-coatings on Antlia ALP-T dual-band filters effectively isolate the red, Ha line, blue-green, OIII line, deep red SII, and the blue H-beta lines from emission nebulae, with almost total suppression of optical density (OD)4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that both the ALP-T dual band Ha&OIII version and SII&Hb version create a superior signal-to-noise ratio and better contrast in your OSC images whether used in urban or rural areas, making them excellent choices for astrophotographers aiming to capture high-quality and more detailed celestial images. p>
Main features and application:
- Passes SII 672.4nm and H-Beta 486.1nm lines
-
- Capturing of the two main emission wavebands in the deep red and blue at the same time
-
- Ultra FWHM 3.5nm design allows for increasing exposure time and capturing detailed nebulae signal
-
- Designed to be used primarily with color cameras to capture cleaner data or used as Luminance filter mono cameras to save imaging time
-
- Recommended to be used with ALP-T Dual Band Ha&OIII filter to create images with better
-
- SNR( signal-to-noise) and better isolation between the 4 channels
-
- Suppression of optical density (OD)4.5 on unwanted wavelengths improves SNR( signal-to-noise)
-
- Near IR (NIR) is blocked up to 1100nm
-
- Ideal flat-top and moderate bandpass reducing spectrum downshifts
-
- Recommended to use the filter with optics f-ratios slower than f 4 for best performance, for optics faster than f 4, pre-shifted highspeed version is a better choice
-
- Ion Gun Assisted Deposition of double-sided multi-layer coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter
-
- Halo suppression anti-reflective coating is used to minimize halo and internal reflections
-
- Designed to suppress artificial lighting from Bortle scale 1 to Bortle scale 8
-
- Blackened edges of unmounted sizes to minimize internal reflections
-
- Antlia s ever-trusted coating technology makes filter durability very reliable
-
- While primarily designed for use with color cameras, the filter is also highly effective with monochrome cameras to save imaging time
-
Technical Data:
- FWHM: 3.5nm +0.5 -0.5nm
-
- CWL (Central Wavelength):
- Sulfur-II: 672.4nm
-
- Hydrogen-Beta: 486.1nm
-
-
- Peak Transmission:
- Sulfur-II: 90%
-
- Hydrogen-Beta: 85%
-
-
- Blocking: ≥OD4.5 @ 300-1100nm
-
- Filter Thickness: 2mm+ -0.05mm
-
- Basic Substrate Optical, Single Non-glued substrate
-
- Surface Quality S D (scratch dig)= 60 40 (Refer to MIL-O-13830)
-
- Transmitted Wavefront Lambda 4 or better. Parallelism less than 30 arcsec
-
Filter Ring:
- 2’’ Mounted (M48*0.75 thread)
-
- Ultra-thin filter cell to minimize vignetting by maximizing possible clear aperture
-
- Black Anodized Finish
-
- Laser Engraving, No Fading
-
Not Recommended:
- Solar Observing and imaging
-
- Night visual observation
-
- DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS. Serious eye damage will result if you fail to observe the warning.
-
Technical Specifications
Antlia ALP-T dualband 3.5nm SII&H-beta Filter
Sulfur-II
Hydrogen-Beta
FWHM
3.5nm +0.5 -0.5nm
3.5nm +0.5 -0.5nm
CWL (Central Wavelength)
672.4nm
486.1nm
Peak Transmission
90.00%
85.00%
Blocking
≥OD4.5 @ 300-1100nm
Filter Thickness
2mm+ -0.05mm
Basic Substrate
Optical, Single Non-glued substrate
Surface Quality
S D (scratch dig)= 60 40 (Refer to MIL-O-13830
Transmitted Wavefront
Lambda 4 or better.
Parallelism
less than 30 arcsec
Filter Ring
2’’ (M48*0.75)
Filter Ring:
2’’ (M48*0.75)
Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture
Black Anodized Finish
Laser Engraving No Fading
In the Box
- Antlia ALP-T Dualband 3nm Ha&OIII Filter 2
-
Warranty & Manual
Antlia 3-Years Warranty against Delamination
Additional Information
Title
Default Title
Related products
Meade Series 4000 1.25 Variable Polarizing Filter (07286) Sale
Original price was: $79.00.$39.50Current price is: $39.50.
Sightron Light Pollution LPS-C1 Filter 2 (M48) Cheap
Original price was: $150.00.$75.00Current price is: $75.00.
Thousand Oaks Broadband Light Pollution Reduction Filter – 1.25 (LP125) Supply
Original price was: $120.00.$60.00Current price is: $60.00.
Baader 4nm O-III filter CMOS-optimized – OPEN BOX (BAA-FCOIIIMSU-2 – OPEN) Supply
Original price was: $525.00.$157.50Current price is: $157.50.
Explore Scientific Nebula Filter S-II 1.25-inch 6.5nm (310125) Online
Original price was: $230.00.$115.00Current price is: $115.00.
* By Signing up here i agree to receive Minigear’s email newsletter.
© 2023 Dexons Theme. All rights reserved.
We using safe payment for
flowtraditionalus.shop © 2025 All Rights Reserved
-
-
Select the fields to be shown. Others will be hidden. Drag and drop to rearrange the order.
- Image
- SKU
- Rating
- Price
- Stock
- Description
- Weight
- Dimensions
- Additional information
- Add to cart
The ALP-T dual band 3.5nm SII&Hb filter is a dual narrowband filter, which lets the deep red Sulfur-II 672.4nm and the blue Hydrogen-Beta 486.1nm lines through and is primarily engineered for color cameras to assist astrophotographers taking deep sky images with superior SNR (Signal to Noise Ratio). With an FWHM half-bandwidth designed at 3.5nm and achieving an optical density (OD) of 4.5 on unwanted wavelengths, it works strongly in blocking light pollution, moonlight, and airglow, leading to enhanced contrast in nebulae images by effectively passing the SII and H-beta emission lines signal only.
It is a significant addition to the popular Antlia ALP-T dual-band Ha&OIII filter and enables false-color images and narrow-band nebula images using OSC. When capturing data with this filter, the nebulae are recorded with high signal-to-noise ratios and greater contrast than without it.
The combination of these two dual band Ha&OIII and SII&H-beta filters allows extreme narrow-band images with OSC cameras by capturing the spectral data from 4 channels i.e. Ha OIII SII Hb. The spectrum of these four channels can be separated and recombined into various color palettes in your post-processing. The resulting images can be used for luminance contrast enhancement of traditional RGB-balanced images or the creation of images in various popular false-color palettes such as H-O-Hb, S-H-O, H-S-OHb, H-O-O, etc.
The advanced multi-coatings on Antlia ALP-T dual-band filters effectively isolate the red, Ha line, blue-green, OIII line, deep red SII, and the blue H-beta lines from emission nebulae, with almost total suppression of optical density (OD)4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that both the ALP-T dual band Ha&OIII version and SII&Hb version create a superior signal-to-noise ratio and better contrast in your OSC images whether used in urban or rural areas, making them excellent choices for astrophotographers aiming to capture high-quality and more detailed celestial images. p>
Main features and application:
- Passes SII 672.4nm and H-Beta 486.1nm lines
- Capturing of the two main emission wavebands in the deep red and blue at the same time
- Ultra FWHM 3.5nm design allows for increasing exposure time and capturing detailed nebulae signal
- Designed to be used primarily with color cameras to capture cleaner data or used as Luminance filter mono cameras to save imaging time
- Recommended to be used with ALP-T Dual Band Ha&OIII filter to create images with better
- SNR( signal-to-noise) and better isolation between the 4 channels
- Suppression of optical density (OD)4.5 on unwanted wavelengths improves SNR( signal-to-noise)
- Near IR (NIR) is blocked up to 1100nm
- Ideal flat-top and moderate bandpass reducing spectrum downshifts
- Recommended to use the filter with optics f-ratios slower than f 4 for best performance, for optics faster than f 4, pre-shifted highspeed version is a better choice
- Ion Gun Assisted Deposition of double-sided multi-layer coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter
- Halo suppression anti-reflective coating is used to minimize halo and internal reflections
- Designed to suppress artificial lighting from Bortle scale 1 to Bortle scale 8
- Blackened edges of unmounted sizes to minimize internal reflections
- Antlia s ever-trusted coating technology makes filter durability very reliable
- While primarily designed for use with color cameras, the filter is also highly effective with monochrome cameras to save imaging time
-
- FWHM: 3.5nm +0.5 -0.5nm
- CWL (Central Wavelength):
- Sulfur-II: 672.4nm
- Hydrogen-Beta: 486.1nm
-
- Peak Transmission:
- Sulfur-II: 90%
- Hydrogen-Beta: 85%
-
- Blocking: ≥OD4.5 @ 300-1100nm
- Filter Thickness: 2mm+ -0.05mm
- Basic Substrate Optical, Single Non-glued substrate
- Surface Quality S D (scratch dig)= 60 40 (Refer to MIL-O-13830)
- Transmitted Wavefront Lambda 4 or better. Parallelism less than 30 arcsec
-
- 2’’ Mounted (M48*0.75 thread)
- Ultra-thin filter cell to minimize vignetting by maximizing possible clear aperture
- Black Anodized Finish
- Laser Engraving, No Fading
-
- Solar Observing and imaging
- Night visual observation
- DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS. Serious eye damage will result if you fail to observe the warning.
-
- Antlia ALP-T Dualband 3nm Ha&OIII Filter 2
-
- Image
- SKU
- Rating
- Price
- Stock
- Description
- Weight
- Dimensions
- Additional information
- Add to cart
Warranty & Manual
Antlia 3-Years Warranty against Delamination
Additional Information
Title Default Title
Related products
Meade Series 4000 1.25 Variable Polarizing Filter (07286) Sale
Original price was: $79.00.$39.50Current price is: $39.50.Sightron Light Pollution LPS-C1 Filter 2 (M48) Cheap
Original price was: $150.00.$75.00Current price is: $75.00.Thousand Oaks Broadband Light Pollution Reduction Filter – 1.25 (LP125) Supply
Original price was: $120.00.$60.00Current price is: $60.00.Baader 4nm O-III filter CMOS-optimized – OPEN BOX (BAA-FCOIIIMSU-2 – OPEN) Supply
Original price was: $525.00.$157.50Current price is: $157.50.Explore Scientific Nebula Filter S-II 1.25-inch 6.5nm (310125) Online
Original price was: $230.00.$115.00Current price is: $115.00.* By Signing up here i agree to receive Minigear’s email newsletter.© 2023 Dexons Theme. All rights reserved.
We using safe payment for flowtraditionalus.shop © 2025 All Rights Reserved
Technical Specifications
Antlia ALP-T dualband 3.5nm SII&H-beta Filter
Sulfur-II Hydrogen-Beta FWHM 3.5nm +0.5 -0.5nm 3.5nm +0.5 -0.5nm CWL (Central Wavelength) 672.4nm 486.1nm Peak Transmission 90.00% 85.00% Blocking ≥OD4.5 @ 300-1100nm Filter Thickness 2mm+ -0.05mm Basic Substrate Optical, Single Non-glued substrate Surface Quality S D (scratch dig)= 60 40 (Refer to MIL-O-13830 Transmitted Wavefront Lambda 4 or better. Parallelism less than 30 arcsec Filter Ring 2’’ (M48*0.75) Filter Ring:
2’’ (M48*0.75)
Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture
Black Anodized Finish
Laser Engraving No FadingIn the Box
Not Recommended:
Filter Ring:
Technical Data:
