SV240 1.25'' Multi-Narrowband Filter for Urban Astrophotography
Telescope Wolves
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- Price: $119.99 USD
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Availability: Pre-order
Estimated Arrival: Between Dec 06 and Dec 20. United States
Ships within 4-7 days
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Description
Cut-off depth ≥OD4: Highly efficient in blocking urban light pollution or other background light;
Photoing more kinds of targets: SV240 multi-narrowband filter select Ha,OIII,H-Beta wavelength effectively can cover almost photoing needs;
High transmittance: The >90% transmittance in core wavelength of Ha,OIII, H-Beta, more objects for your astrophotography by using this multi-bandpass filter;
Multi-bandpass filters: Without multiple filters' combination for colorful images;
Resistant of BORTLE 8: the multi-narrowband filters can be resistant from Bortle 1 to Bortle 8 cities, suitable for almost all urban.
Note: Optical filters that use infrared light often cause halos in the NIR region, which are exacerbated by the halos produced by the filter itself.
SV240 1.25inch Multi-Narrowband Filter
The Multi-Narrowband filter is designed for astrophotography, allowing you to capture most deep sky objects, including galaxies, reflection nebulae, emission nebulae, and star clusters, across a range of Bortle conditions (from Bortle 1 to Bortle 8). It is especially effective in light-polluted environments, enabling imaging under bright man-made light and moonlit conditions. Ideal for One-Shot Color cameras, this filter allows you to capture color images without the need for multiple filter combinations. It offers high transmittance of key emission lines (Ha/OIII/H-Beta) in the visible spectrum, enhancing signal-to-noise ratio (SNR) and contrast. Additionally, it passes near-infrared light, enabling imaging of deep sky objects that other filters may not capture.

The 300-1100 nm working wavelength of this multi-narrowband filter provides wider coverage, enhancing its ability to tackle light pollution.


The multi-narrowband filters can be resistant from Bortle 1 to Bortle 8 cities, suitable for almost all urban.


If you have different astrophotography systems, no need to prepare dedicated filters; one SV240 can meet your needs due to its high compatibility. The SV240 multi-narrowband 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.


Real Shot Images




Specifications
| Product Specifications | 1.25 inches |
| Mirror Ring Size | Φ31.75x7mm |
| Weight | 5.4g |
| Thread Type | Single Thread / Male Thread |
| Thread Specification | M28.5*0.6mm |
| Material | 6061T Aluminum Profile |
| Processing Technology/Surface Treatment | CNC/Blackening and Delustering Oxidation |
| Substrate | Corning EAGLE |
| Substrate Thickness | 2.0mm |
| Light Aperture | 26mm |
| Single Point Transmittance |
T>95%@486.1nm T>92.4%@495.9nm T>88.2%@500.7nm T>97%@656.3nm |
| Infrared Transmittance Band | Tavg>98.2%@830-870nm |
| Wavelength Control Point |
T=50%@482nm T=50%@783nm |
| Cut-off Wavelength | 300-450nm&560-620nm&690-750nm&940-1100nm |
| Bandwidth/FWHM | 25nm&22nm&115nm |
| Cut-off depth Average | >OD5 (0.0006%) & Average>OD4 (0.004%) & Average>OD2 (0.39%) & Average>OD3 (0.08%) |
| Surface quality | 60/40 |
| Surface parallelism | λ/2 |
Shipping & Returns
Order Shipment:
If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at shipping@telescopewolves.com.
Cancellations & Refunds:
All orders canceled after 48 hours are subject to a $20 administration fee, whether or not your order has shipped. If your order has shipped, you (the buyer) will also be responsible for actual return shipping charges. Refunds will only be issued to the original credit card that you use when placing your order.
Damages:
Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery. If your item(s) do arrive damaged, please send photos to shipping@telescopewolves.com and we will process an insurance claim on your behalf.
Price Match
We want you to spend your time focusing on the stars, not on the price.
If you find another online store that offers a lower price than 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, we 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
Not convinced yet? Check out all our amazing products here!
Warranty
Our Promise
We know you'll like the products we offer as much as we do- that's a Telescope Wolves Guarantee. In fact, if for any reason there is an issue with your products, please contact us upon receipt of your order with your order number and concern, and a member of our team will be happy to assist you from there.
Telescope Wolves will be happy to refund you the difference in price:
- if you find another online store that offers a lower price than us within six months of your purchase date, OR
- 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
Please consult our Price Match Guarantee for further details.
Product Warranty Policies
We also offer warranties from each of our partners (to ensure that you enjoy the products as much as we do).
Vixen's Warranty :
Vixen warranties its products to be free from initial defects in materials and workmanship for a specified period based on part type:
- Vixen Electronic Parts: Limited One Year Warranty
- Vixen Mechanical Parts: Limited Two Year Warranty
Interested? Shop for all of Vixen's products here.
Bresser's Warranty :
Bresser offers a limited USA one year warranty when product is registered within 60 days of purchase. Interested? Shop for all of Bresser's products here.
Explore Scientific's Warranty :
Explore Scientific offers a limited USA one year Warranty, which also converts to the Explore STAR Transferable Extended Life of the Product Warranty. Product must be registered within 60 days of purchase for this warranty to apply.
Interested? Shop for all of Explore Scientific's products here.
Daystar Filters's Warranty:
If used as directed, your DayStar filter is guaranteed for ten years. Should the filter become inoperative due to optical or mechanical failure, Daystar will repair the filter or replace it with an equivalent filter at no repair cost to the customer.
Under no circumstances shall a refund be issued:
- due to application issues or the buyer's lack of skills in application of the product
- Application of the DayStar product requires a degree of technical expertise specific to the exact product line, which is not common to other optical applications
- if the product’s technical application procedures are NOT followed properly and poor results are yielded
- Application procedures are posted on Daystar’s website and are stated in further detail in the client's operation manual
- due to buyer’s remorse
Goods are warranted to be in operative, working condition as stated in specifications of product at the time of delivery. Should the goods not meet these specifications, Telescope Wolves will put a request in on your behalf to repair or replace the goods with items which meet stated specifications of product.
- Goods shipped shall meet specifications stated by means of optical laboratory testing using independently verified spectrometer testing methods, visual inspection, and visual qualification of performance.
Interested? Shop for all of Daystar Filters's products here.
Hutech's Warranty:
Hutech offers a one year warranty on all its products.
Interested? Shop for all of Hutech's products here.
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