Product Details

OPTOLONG Filter H-Alpha 7nm SII-CCD 6.5nm OIII-CCD 6.5nm Narrow Band Telesope Filter Kit for Deep Sky 36mm Mounted Wheels
The Optolong 36mm Mounted Filter is made with Schott glass that is multi-coated with an ion-assisted deposition technology to provide scratch resistance and stability at the central wavelength, or CWL. This filter is designed to be used in filter wheels that accept 36mm mounted filters.

The Optolong H-Alpha 7nm is an extremely narrow emission-line filter that works by allowing a 7nm bandwidth of light, centered on the 656nm wavelength, and blocking the transmission of contrast-killing light pollution wavelengths. Wavelengths responsible for natural light pollution, or skyglow, have been drastically reduced, as is artificial light pollution caused by high and low pressure sodium vapor and mercury vapor lights. The result is a high contrast image that reveals the H-alpha line in all its glory.

The Optolong Sulfur II 6.5nm Extra Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light responsible for light pollution (both artificial and natural). Like all Optolong filters designated as CCDs, this SII filter also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-cut filter.

The Optolong Oxygen III 6.5nm Extra Narrowband Filter transmits a 6.5nm bandwidth of light centered at 500nm and drastically reduces other transmissions, including wavelengths of light responsible for light pollution (both artificial and natural). Like all Optolong filters designated as CCDs, this OIII also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter.

The Optolong 6.5nm SII filter can be used in conjunction with H-Alpha and OIII filters for false color emission line images like the Hubble Space Telescope.

Note: This h-alpha filter is NOT for use on the Sun. doing so could cause irreparable eye damage or blindness. Don't even think about it!

Quality Filter Materials:

Schott B260 substrate material from Germany, 2.0mm thick

Multiple layers of anti-reflective non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition

Filter Production Processes and Parameters:

Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism across both surfaces

Surface quality, according to MIL-O-13830, is 60/40

80% transmission on OIII line 500nm (on SII line 672nm; on H-alpha 656nm)

Infrared wavelength of 700-1100nm is cut off

0.1% transmission Hg at 435nm and 578nm

0.1% transmission Na at 589nm

High-value transmission of pass-band and optical density of off-band is ensured by Optolong's planetary rotation system, a homogeneous and precise coating procedure

Each filter comes with a plastic case with high pressure EVA case liner

Package:

OPTOLONG 36mm H-Alpha 7nm Filte

OPTOLONG 36mm SII 6.5nm Filter

OPTOLONG 36mm OIII 6.5nm Filter

Three Solid Plastic Cases

Photo show

IMPROVED SHO6.5nm Filters Performance

Ⅰ. NGC7000- The North America Nebula  © Francesco Battistella-AstroAtlas

Technical Information:
Telescope: AIRY APO 130T Primalucelab
Mount: Paramount MyT - Software Bisque
Camera: QHYCCD QHY9
Filter: Optolong H-a 7nm, OIII 6.5nm
Frames: H-a: 49x900s -- OIII: 36x900s
Total Integration: 21,25 Hours
Software: SGP – TheSkyX – PHD2 – DSS – PixInsight – CS6
Location: Noventa di Piave (Venice) 4 meter above sea level – ITALY
Environment Temperature: About 23°C
Relative Humidity: 89%
Date: 26.06.20 - 27.06.20 - 04.07.20 - 25.08.20 - 27.08.20
NOTE: High Humidity and Sky Bortle: 5

Ⅱ. The Pelican Nebula  © Astrodoc Ron Brecher  

Tekkies:
Sky-Watcher Esprit 150 f/7 refractor, QHY 16200-A camera, Optolong Ha, O3 and S2 filters, Paramount MX. Acquisition with TheSkyX unguided. Focus with Optec DirectSync motor and controller. Automation with CCDCommander. Equipment control with PrimaLuce Labs Eagle 3 Pro computer. All pre-processing and processing in PixInsight. Acquired from my SkyShed in Guelph. No Moon, average to above average transparency and average seeing. Data acquired September 3-21, 2020.
11x10m S2, 19x10m Ha, and 9x10m O3 (Total = 6hr00m)
Image scale 1.15 arcsec per pixel
Data Reduction and Cleanup
The WeightedBatchPreProcessing script was used to perform calibration, cosmetic correction, registration and integration of all frames.
Chrominance

III. NGC 7000 The North America and IC 5070 The Pelican Nebulae © José Jiménez

NGC 7000 The North America and IC 5070 The Pelican Nebulae
La Jonquera - Girona
SHO
ZWO ASI1600MM PRO & Askar FRA400mm
8 x 900" Optolong  H-Alpha
8 x 900" Optolong SII
8 x 900" Optolong OIII
Sky Watcher AZ-EQ6 PRO mount
Guide camera ZWO ASI 120MM
RGB
ZWO ASI1183MC PRO & WO SpaceCat51
8 x 900" Optolong  L-eXtreme
Sky Watcher AZ GTI Mount
Guide camera ZWO ASI 462MC
Calibrated, stacked and processed with Pixinsight, and final tweaks with Lightroom

Ⅳ. Bubble Nebula | NGC 7635© Luca Fornaciari Astrophotography

Bubble Nebula | NGC 7635 | Narrowband shots in Hubble Palette SHO (Sii:Ha:Oiii)
Tecnosky RC8’’ f/8 Carbon Deluxe on AZEQ6-GT | Qhyccd 163m | Optolong Astronomy Filter Narrowband filter
Ha: 76x300’’ | Oiii: 64x300’’ | Sii: 85x300’’
Elaboration with Pixinsight and Adobe Photoshop 2020.
Website: www.lucafornaciarifotografia.com
Frames captured from Carl Sagan Observatory in Maranello (Italy).
Bortle 5 / SQM

V. Fireworks in Monoceros© Terry Hancock

Technical Details
Captured and processed by: Terry Hancock
Location: GrandMesaObservatory.com Purdy Mesa, Colorado
November 1, 2, 3, 4th 2019
HA 430 min 43 x 600 sec
OIII 340 min 34 x 600 sec
SII 300 min 30 x 600 sec
Narrowband Filters by Optolong
Camera: QHY16200A
Gain 0, Offset 130 Calibrated with Dark and Bias Frames no Flat.
Optics: William Optics Redcat 51 APO @ F4.9
EQ Mount: Paramount ME
Image Acquisition software Maxim DL6
Pre Processing in Pixinsight
Post Processed in Photoshop CC
Starnet (star removal)

The Rosette Nebula (also known as Caldwell 49)This active star forming nebula lies in the Monoceros Constellation (the Unicorn) only 5,200 light-years distant. The dense cloud of hydrogen has been condensing to form new stars and is thought to be very similar to the environment that gave birth to our own Solar System. As the new stars ignite they blow off their shrouds and irradiate thier surroundings and cause the hydrogen to glow from the ionizing radiation. Like dust being blown by the wind, these newborns push the hydrogen and dust away where it collapses under gravity to accelerate the formation of yet more stars, excavating the inner region of the nebula over time.

Ⅵ. IC1795 & NGC896-The Fish Head Nebula © Francesco Battistella-AstroAtlas

Technical Information:
Telescope: AIRY APO 130T Primalucelab
Mount: Paramount MyT - Software Bisque
Camera: QHYCCD QHY9
Filter: Optolong H-a 7nm, OIII 6.5nm, SII 6.5nm
Frames: H-a: 40x900s -- OIII: 46x900s -- SII: 36x900s
Total Integration: 30.5 Hours
Software: SGP – TheSkyX – PHD2 – DSS – PixInsight – CS6
Location:  AstroAtlas Observatory - Noventa di Piave (Venice) 4 meter above sea level – ITALY
Environment Temperature: About 23°C
Relative Humidity: 90%
Date: 11.09.20 - 12.09.20 - 13.09.20 - 14.09.20 - 15.09.20 - 17.09.20

Ⅶ. NGC6888-The Crescent Nebula © Francesco Battistella-AstroAtlas

Technical Information:
Telescope: AIRY APO 130T PrimaLuceLab
Mount: Paramount MyT
Camera: QHYCCD QHY9
Filter: Optolong H-a 7nm, OIII 6.5nm, SII 6.5nm
Frames: H-a: 40x900s -- OIII: 40x900s -- SII:32x900s
Total Integration: 28 Hours
Software: SGP – TheSkyX – PHD2 – DSS -PixInsight – CS6
Location: Noventa di Piave (Venice) 4 meter above sea level – ITALY
Environment Temperature: About 19°C
Relative Humidity: 89%
Date: 24.03.20 - 06.04.20 - 09.04.20 - 10.04.20 - 20.05.20 - 26.05.20 - 27.05.20 - 11.06.20 - 12.06.20
NOTE: Bortle Sky 5

Warm prompt

●About color: due to the influence of ambient light, color difference of the display and flash photography, the color of the product may have some color difference. Detailed color is in accordana with the final product.

●About coating: the interference filter will show different colors under different light, which is a normal phenomenon. Please refer to the material object.

●About the style: in order to improve the product, the change of design/appearance/parameters has not been updated in time. Please see the subject produce.

●About the description: the series of this product have the same material, technology and design, different sizes only, please note.

Astronomy Store is the dealer of Optolong AliExpress platform and guarantees that all the

products are official genuine and brand new products.

1.1 How can I check the shipping cost for my order?
You can add the items you want to your shopping cart, enter your country/state/city/postal code, and then view the shipping options and costs on the cart page. Before checkout, you can choose your preferred shipping speed/method/carrier.

You can also contact us and send us the item model, quantity, and shipping requirements. We will calculate the accurate shipping cost for you and inform you accordingly.

1.2 How are free shipping items delivered?
Items marked as "Free Shipping" on the product page mean you do not need to pay any shipping fees. This usually applies to buyers from any country (except for certain special countries or regions).

For free shipping items, buyers cannot choose the shipping method. We will select the shipping method based on the destination country.
Typically, we use standard surface shipping methods such as 4PX, EMS, or local postal services.
We may also use UPS, FedEx, DHL, Aramex, etc., depending on the specific order and country. The final choice is at our discretion. Regardless of the shipping method used, we will notify you upon dispatch and provide a tracking number and tracking website.

• Standard tracking website: https://www.17track.net/en
• UPS: https://www.ups.com/
• FedEx: https://www.fedex.com/
• DHL: https://www.dhl.com/

Please note: If you return an item (excluding quality issues or incorrect items), you will be charged for all shipping costs incurred, including delivery, return, and customs fees.

1.3 What if I want to specify a shipping method for a free shipping item?
If you want to specify a particular shipping method (e.g., UPS or DHL) for a free shipping item, please contact us before placing your order. You will need to pay additional shipping fees, and we will ship via your preferred method.

1.4 What if I buy multiple items, some with free shipping and some that require shipping fees?
You can place your order as usual. You only need to pay shipping fees for the non-free shipping items.
If you want to specify a shipping method or have other special requests, please contact us.

1.5 How long does it take to ship my order?
After receiving your order, we need some time to process it.
Orders received before 5:00 PM China time will be shipped within 3 days.
Orders received after 5:00 PM China time will be shipped within 4 days.
Orders placed during Chinese public holidays may be delayed by 1–2 days (due to courier holidays).

1.6 When will I receive my package?
Delivery time varies depending on the shipping method used:

• 4PX, Postal Services, EMS, etc.: about 15–25 days
• UPS: about 7–15 days
• FedEx: about 7–10 days
• DHL: about 5–9 days

These are estimated times. Actual delivery is subject to the carrier's schedule.

If your package tracking has not been updated for a long time, please contact us.
If you haven't received your package after a long period, please contact us.
If there are any other irregularities, please contact us.

Please note:
After we ship your package, it may take 2–3 days for tracking information to become available.
Based on our experience, packages shipped to South America and Central Asia typically take longer.
Shipping around public holidays may result in delays due to carrier workload.

If delays occur, we kindly ask for your patience and understanding. We share the same desire as our customers—we hope every package is delivered quickly and safely.

If you want a faster and more secure delivery, we strongly recommend choosing UPS, FedEx, or DHL.

1.7 What does it mean when tracking shows "Label Created" but the order hasn't shipped yet?
When we provide a tracking number, your package has already left our warehouse.
However, the tracking status may show "Label Created" or "Awaiting Package" because the package is still en route to the courier's sorting facility.
Due to China's vast geography, transit between cities can span over 1,000 km, so it takes time.
It may also be undergoing export customs clearance. Your package should be delivered soon.

If your tracking status doesn’t update for a long time, please contact us.

1.8 What if my package needs special delivery instructions or other requests?
If your shipment requires an invoice to be attached, special packaging, delayed dispatch, or other requests, please contact us.
We will do our best to accommodate your needs and provide the best service possible.

1.9 About receiving the package
Whether you sign for the package personally or through a representative, it is considered as acceptance of the package, the quantity, and the included items.
To protect your rights, we strongly recommend recording a video while opening the package and verifying it against the order and packing list.

1.10 I don’t live in China. Can I have my order shipped to a Chinese address?
Yes, you can. Just place your order and provide a Chinese recipient address.
For orders shipped within China, we do not charge any shipping fees. If your item shows a shipping fee, please contact us to have the fee waived.

You are responsible for all applicable taxes and fees that may be imposed by your country or region, including but not limited to import duties, value-added tax (VAT), customs handling fees, and other similar charges.

These import duties, VAT, and customs fees are not included in our product prices or shipping charges.
We have no control over, and cannot predict, these charges or how they will be collected—whether they will be charged at the time of delivery or through other means.

Customs policies vary greatly by country. Some countries (such as Brazil, India, etc.) strictly enforce high duties and additional taxes.

It is your responsibility to check with your local customs office before purchase to determine what additional costs may apply.

Customs fees are usually charged by your local courier or postal service, often at the time of delivery or pick-up. The shipping carrier (especially UPS) may also charge brokerage or clearance fees for handling customs on your behalf. These are not unpaid shipping charges and must be fully covered by you.

If the package is returned, held, or destroyed due to the buyer’s refusal or failure to pay customs duties, any resulting costs will be borne entirely by the buyer. These costs will be deducted from your refund.

1.1 What is your return policy?
I ordered the wrong item/size, or I changed my mind—can I return it?
I received the item but decided I don’t like it—can I return it?
I received the item but found it’s not suitable for me, or I found a better option—can I return it?

In the above cases, we accept returns within 30 days of receiving the item, provided that the product is in brand new and unused condition.

• Buyers must apply for a return and send the product back to us within 30 days of receipt.
• You are responsible for all return shipping costs.
• We will deduct the original shipping cost incurred to deliver the item to you.
• We will deduct 4% for credit card or PayPal transaction fees.
• If you choose to receive a store credit instead of a refund, we will waive this 4% fee.
• If the returned item shows signs of use, a handling fee may be charged.

If the returned item is damaged, missing parts, or shows excessive wear, we reserve the right to reject the return and no refund will be issued.

1.2 Where should I send the return?
Please contact us for the correct return shipping address. (The return address may not be located in Mainland China.)
Please ensure the item is properly packaged and that the original product packaging is not damaged.

Important: Do NOT return the product to the sender’s address shown on the parcel. You must contact us first to obtain the correct return address. Unauthorized returns may be lost or undeliverable—any such loss will be fully borne by the buyer.

1.3 Can I return or exchange the item after 30 days?
For any reason, we do not accept returns or exchanges after 30 days.
30 days is considered a very reasonable and standard return period for online purchases.

1.4 What if I received a wrong or defective item?
Please contact us within 3 days of receiving the item and provide photo evidence or a clear description of the issue. We will promptly send a replacement item.

If you return the item to us:

• Please use the least expensive shipping method.
• We will reimburse part of the shipping fee from your original order as compensation.

If you’re unable to return the item or don’t know how to ship it, please contact us—we may provide a free return shipping label.

1.5 How will I receive my refund? How long does it take?
We will process the refund within 7 days of receiving your returned item.
Refunds are usually issued via the original payment method.
Processing the refund involves internal verification and approval by management, so we appreciate your understanding and patience.