Antlia Quad Band Anti-Light Pollution Filter - 2" Mounted (ALP-QUAD-LP-2)
ALP-QUAD-LP-2
Antlia Quad Band Anti-Light Pollution Filter - 2" Mounted (ALP-QUAD-LP-2)
ALP-QUAD-LP-2
Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
Stress Free, Secure Transactions
You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored according to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Product Description
The Antlia Quad Band Anti-Light Pollution Filter is a light suppression filter for color and monochrome cameras. It is able to shoot most deep sky objects like galaxies, reflection nebulae, emission nebula, and star clusters from a Bortle 8 location to Bortle 1 as its spectral transmission passes through visible light region, near-ultraviolet (NUV) and near-infrared (NIR) region.
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 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 image signal-to-noise ratio and contrast by capturing signals in visible bands and NIR region, while also maintaining ood color balance and being easier to manage in post-processing.
Certain full-spectrum objects like M51, M83 possess significant signal in the near-infrared (NIR) region, you can possibly capture these deep sky objects more contrasted with the Antlia Quad Band filter under light polluted condition.
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.
Specifications
| Model | Hydrogen-alpha | S-II | O-III | H-beta | NII |
| FWHM | 5nm | 5nm | |||
| CWL (Central 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 |
Filter Ring:
- Antlia standard ring:1.25’’ (M28.5*0.6)，2’’(M48*0.75)
- Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture
- Black Anodized Finish
- Laser Engraving No Fading
Not Recommended:
- 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.
Customer Reviews
I bought the Antlia quad band a few weeks ago and am very happy with it. Its purpose is to block wavelengths of visible spectra that pollute our cities, and this one is great. I can obtain nice detail on nebula in my Bortle 8 backyard. 5 out of 5 stars, totally worth it. Recommended.
Slight bloat in the brightest of stars, but excellent otherwise
Great service, as always!! All-Star Telescope is always great to work with.
Definitely my go to filter for light pollution. Works well for galaxies and nebulas.
A great filter for shooting BB targets in heavy light pollution.
Replaces my Lpro and does a better job.
Additional Articles, Videos, and Links
Astrophotography for Beginners Step 4: Shooting Deep-Sky Images
Taking deep sky pictures can be daunting, luckily there is an easy process to follow to allow you to get great shots! Here is the typical process for actually taking deep-sky images in the field.
Astrophotography for Beginners Step 3: Choosing Gear for Deep-Sky Imaging
Using a star tracker gains you experience with the fundamentals of deep-sky imaging. Shooting the Moon gains you experience focusing and framing through your telescope. Through your sessions you’ll...
Astrophotography for Beginners - Start Here: Getting into Astrophotography Step by Step
Shooting the night sky has never been more popular, nor easier. The choice of equipment has also never been better, or more affordable. However, as per the advice given by Dickinson and Dyer in the...
Astrophotography for Beginners Step 1: Using the Star Adventurer Tracker
By far the most economical and easiest way to capture beautiful images of the Milky Way and large deep-sky objects like the Andromeda Galaxy (shown here) is to use a star tracker. Here are steps an...
Astrophotography for Beginners Step 2: How to Shoot the Moon
Close-ups of the Moon are rewarding, and an easy way to learn to shoot through your telescope. While good results are possible with a phone camera clamped to an eyepiece (as shown below), this tuto...