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IDAS -Light Pollution Suppression Filter - LPS-D3
IDAS -Light Pollution Suppression Filter - LPS-D3
IDAS -Light Pollution Suppression Filter - LPS-D3
IDAS -Light Pollution Suppression Filter - LPS-D3
IDAS -Light Pollution Suppression Filter - LPS-D3
IDAS -Light Pollution Suppression Filter - LPS-D3
IDAS -Light Pollution Suppression Filter - LPS-D3
IDAS -Light Pollution Suppression Filter - LPS-D3

IDAS -Light Pollution Suppression Filter - LPS-D3

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    Estimated Arrival: Between Oct 19 and Oct 31. *ETA to USA Only

    IDAS LPS-D3(formerly NGS1) filters enhance the contrast of astronomical emission nebulae against a sky with both man-made and natural* sky glow sources, yet preserve color balance of broadband objects such as galaxies. As with other IDAS interference filters, the bandpasses are designed to accommodate the steep ray angles of fast optical systems.


    Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae (see filter plots). The most recently introduced version (D3) has a bandpass designed to cope with the increasing trend of society's switch to LED lighting.

    Unlike other light pollution suppression filters, IDAS filters are specifically designed for balanced color transmission using the IDAS unique Multi-Bandpass Technology (MBT) process. The balanced transmission allows color photographs to be taken with minimal color cast to broadband emission objects such as stars, galaxies and globular clusters.

    LPS filters utilize the unique IDAS Ion Gun Assisted Deposition (IGAD*) coating technology for superior coating durability (quartz hardness) and safer cleaning. IGAD coatings also improve temperature and humidity stability of the filter performance, reducing spectrum shifts down to +/-1nm from the +/-3 or 4nm shift of standard coatings. 

    D2 Plot Sample

    CCD imaging can also benefit, because although CCD imagers can already shoot through light pollution to some extent, including an LPS filter to the setup gives an added (signal-to-noise) edge as shown in these CCD examples (comparison testing by G. Tomita in Tokyo). LPS filters are available for 1-1/4" and 2" (48mm) eyepieces, as well as in numerous sizes to accomodate most popular camera lenses. Each filter lot is tested and a plot of the spectral response of the lot is provided with each filter (see filter plot sample).


    Features include:

    • Ideal flat-top and moderate bandpass
    • Excellent in-band transmission
    • Steep bandpass edges minimize internal reflections
    • Near IR (NIR) is blocked up to 1200nm
    • Available in 52mm and 48mm sizes
    • 2.5mm thickness (parfocal with other IDAS LPS filters)
    • IDAS-proprietary IGAD/MBT/UFP quality
    • Made in Japan

    * Natural sky glow sources blocked include upper atmosphere oxygen and sodium lines which become visible from high-altitude, dark sky sites.

    We work very hard to ensure that we offer the absolute best prices online.  If you find another online store that offers a lower price then us within six months of your purchase date please let us know and we will refund your original payment for the difference.  We want you to feel confident that you are getting the absolute best price for the product you are ordering.  If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.

    To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.

    Our 100% Price Guarantee has some limitations:

    • You must purchase the item from our website before requesting your Price Match Guarantee
    • Promotions such as rebates and buy one, get one free offers are not eligible
    • The item must be in stock on the competitors website
    • The competitor must be an online store, they may not have a retail location
    • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
    • The competitor must be an Authorized Retailer of the product in question
    • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

    Order Confirmation As soon as you place your order you will receive an order confirmation e-mail.  This means that we have received your order in our system and pre-authorized your credit card for the purchase.  As soon as we receive your order we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment.  If your item is on backorder or unavailable we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days) we will process the charges and submit the order for shipment.

    Order Shipment If your order is received, the inventory is in stock and your credit card information matches the information, In most cases, we can ship within 5 business days. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address your provide when checking out.  If you do not receive tracking information from us within six business days of your order please email us at info@skygazeoptics.com.

    Miscellaneous Shipping Information

    • We cannot ship to PO boxes.
    • Non-standard shipping surcharges will apply to isolated service areas, such as remote areas, areas not readily accessible by a delivery vehicle, islands, Hawaii & Alaska etc., as defined by the shipper. These circumstances occur less than 1% of the time.

    Delivery Times

    You can estimate the deliver time to your home or business by viewing the "Ships Within" information listed with every product. This refers to the time from when you place your order, to the time it leaves the warehouse. The total delivery time for your order is calculated from the time your order is placed, until you receive it. The diagram below shows how the total delivery time is broken down into pre-ship processing time and shipping time. 

    Processing time is the time it takes from when you submit your order to when the product leaves the warehouse. The "Ships Within" time frame listed with each of our products on the website applies to this time frame. For example, if your order a product that reads "Ships Within: 2 Weeks", this means that the product typically leaves the factory within two weeks. If there will be any additional time required to process your order, we will notify you immediately to confirm the delivery period. This time is needed for products that are shipped to you directly from our manufacturers. The manufacturers need this time to fulfill your order. In some cases, the items are custom built.  Shipping time is measured when your order leaves the warehouse to when it arrives at your address. Actual shipping time can vary between 2-5 business days. Contact our helpful customer service experts at (888-264-2244)  for more information.


    Did your shipment arrive damaged or defective?

    Please report damaged or defective merchandise to us immediately by email phone. Photos of the items and the packaging would be greatly appreciated. This will speed up our resolution process. We strongly recommend at the time of delivery, if your notice any cartons that look dented, crushed or just not right, open them immediately and inspect the contents. If the contents appear to be damaged, please notate it on the delivery ticket, refuse that item only and contact us as soon as possible for instructions.

    Brands/Products that do NOT qualify for our 30 Day Return Policy:


    APM products do not qualify for our 30 day return policy.

    Custom Orders

    Additionally, items that are special ordered, customized, or engraved - cannot be returned or refunded under our 30 day return policy. 

    If your engraved item needs to be repaired within 30 days of purchase, please reach out to us and we will have the product repaired or replaced, re-engrave if necessary, and return it to you in new condition.

    Customer Reviews

    Based on 7 reviews
    Nice filter with one small problem.

    Let me start by saying I knocked one star off not because of Nick and Skygaze. The whole experience of ordering and follow on communication is outstanding, and I will definitely order from Nick in the future. The rating downgrade comes from the fact this filter is ever so slightly thinner than the ZWO lum filter I was replacing. That means it can rotate within its well in the ZWO filter wheel, which really messes up flats. Solved the problem by installing the thinnest strip of foam i could find on the lip of the well so the filter rests on the foam. That solved the rotation problem, but it's not the best solution. New gear curse in full swing, too many clouds to properly evaluate the filter itself, but will update this review when I can do a side-by -side comparison of light pollution suppression from my Bortle 5 back yard. Again, the SkyGaze Optics experience is stellar (haha).

    Bortle scale 7

    I live in a Bortle scale 7 area and generally shoot night sky pictures from the convenience of my home. This filter worked well for what it is meant for.


    Only had a few nights of using it but so far it’s great! Make sure you take your calibration frames because it helps with color correction. Can’t say anything bad it does a great job of blocking light pollution from my Bortle 5.

    Filter feedbsck

    Seems good. I have not yet processed files but I'll be surprised if it is not what it was advertised to be.

    IDAS-LPS-D2 48mm

    Have only had the chance to test it once and it did well so far. I did notice it cut my exposure times in half allowing more light through than the Broadband filter I had been using so this might work out well. Will need more practice to post a detailed review. Shipping was fast and purchase price was best I could find. Communication with Skygaze was great.


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