Antlia Quad Band Light Pollution Filter
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 Antlia Quad Band Light Pollution FilterAntlia Quad Band Light Pollution Filter 

Antlia Quad Band Light Pollution Filter

£205.00✓ 2 year warranty
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Out of stock due 60-90 working days

About this product

Model:  antlia_quad_2
Part Number:  Quad Band Anti-Light Pollution

Antlia Quad Band Light Pollution Filter

The Antlia Quad Band Anti-Light Pollution Filter is a light suppression filter for colour and monochrome cameras. It can be used to image most deep sky objects, including galaxies, reflection nebulae, emission nebula, and star clusters from a Bortle 8 location to Bortle 1, as its spectral transmission passes through the visible light region near the ultraviolet (NUV) and the near-infrared (NIR) region.

The Antlia Quad Band filter has a broad bandpass designed to cope with faster optics up to the f/2 focal ratio.

Considering the high quantum efficiency (QE) characteristics of the latest cameras in the near-infrared region and taking into consideration that this region is less susceptible to artificial light pollution, the Antlia Quad Band Light-Pollution Filter adds high transmission in the near-infrared (NIR) band. This spectrum design improves the image signal-to-noise ratio and contrast by capturing signal in visible bands and NIR regions while maintaining good colour balance and being easier to manage in post-processing.

Full-spectrum objects like M51 and M83 possess significant signal in the near-infrared (NIR) region, so you can capture these deep sky objects with better contrast under light-polluted conditions.

When using this filter with a camera that has UV/IR cut protective glass, the visible band transmission signal is retained, but the IR cut limits your ability to capture targets with infrared signal.

Therefore, the Antlia Quad Band filter is more suitable for cameras with AR protective glass as they can capture both NIR and visible band signals.

Features

  • Anti-Light Pollution
  • The Antlia Quad Band filter is an effective solution for reducing light pollution, as it cuts out most of the orange-yellow light from 589nm and part of the blue light from LED street lighting
  • Useful when imaging over 95% of deep sky objects
  • Unique spectral design offers more possibilities for astrophotography
  • High transmittance of the main emission lines Ha/SII/OIII/H-Beta in the visible region enhances SNR and contrast
  • Near-infrared (NIR) region transmittance
  • Passing near-infrared region is for shooting deep sky objects that cannot be imaged with other filters without NIR transmission
  • The broad bandpass is designed to cope with faster optics up to the f/2 focal ratio.
  • Good colour balance
  • It is easier to achieve colour balance by adding the short-wavelength transmission

Antlia Quad Band Anti-Light Pollution Filter Advantages

  • Superior optical reliability reduces post-image processing
  • 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
  • Warranty: 3 years against delamination
  • Ultra-thin filter cell to minimise vignetting by maximising possible clear aperture Black Anodized Finish
  • Laser Engraving No Fading

Not Recommended For:

  • Solar imaging
  • Night visual observation

Not Permitted:

  • DO NOT LOOK AT THE SUN WITH THIS FILTER
  • Serious eye damage will result if you fail to observe the warning.

Specifications

  Ha SII OIII H-Beta NII
Wavelength 656.3nm

671.6nm

672.4nm

495.9nm

500.7nm

486.1nm

 

658.3nm

654.8nm

Peak Transmission >92% >92% >92% >92% >92%
Blocking

≥OD4@ 300-1050nm

≥OD4@ 300-1050nm ≥OD4@ 300-1050nm ≥OD4@ 300-1050nm ≥OD4@ 300-1050nm
Filter Thickness

2mm+/-0.05mm

2mm+/-0.05mm 2mm+/-0.05mm 2mm+/-0.05mm 2mm+/-0.05mm

 

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