Optolong L-Pro Deep Sky Light Pollution Filter - 1.25"
The L-Pro Filter is the best choice for light pollution suppression and allows astrophotos to be taken of broadband emission objects such as galaxies, reflection nebulae and globular star clusters.
The relentless spread or urbanization and its associated light pollution have become a big problem for all amateur astro photographers around the world. One solution is to purchase a Mono camera but this can be expensive and might also require the purchase of several types of narrowband filters and a filter wheel.
L-Pro is a multi-bandpass filter which offers much better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro remains the best choice for viewing or photographing broadband targets in light polluted areas.
L-Pro (L-Professional) filter is designed to improve the visibility of various deepsky objects by selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lights such as mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent main emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural areas with heavy light pollution.
L-Pro has a multiple anti-reflective coating on the optical substrate and uses a precision coating based on ion deposition coating technology. This ensures durability and scratch resistance as well as stability on the CWL (central wavelength), which is not affected by temperature changes.
IMPORTANT WARNING: These nebula filters are NOT designed for observation of the Sun. Do not use this filter to look at the Sun as serious eye damage, blindness as well as damage to equipment may result.
Professional visual and photographic filter for astronomy
Improves deep sky nebula constellation photography
Best choice for broadband light pollution suppression
Filter diameter: 1.25 inch / 31.7mm
Connecting thread: M28.5 x 0.6mm (Eyepiece thread 1.25 inch)
Selected optical glass material
Surface Quality: 60/40 (Refer to MIL-O-13830)
Fine-optically polished glass to ensure accurate 1/4 wavefront and highest parallelism over the both surfaces
High transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm&500nm, SII 672nm and H-beta 486nm)
Precision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm)
L-Pro filter (1.25")
Dust protection box
Please Note: Items in stock and ready for dispatch immediately are usually delivered within 24-48hrs. Some items may be 'Special Order Items' and require additional lead time before being dispatched eg. 5 - 10 Working days - This will be highlighted on the product page before purchase.
All orders are shipped using our reputable courier partners to ensure your items arrive safely and promptly. While we do offer International Delivery, we are unable to ship large Telescopes and Mounts outside of Ireland.
REPUBLIC OF IRELAND
Est. Delivery Time after Dispatch: 24 - 48 hrs
Standard Express Shipping: Ireland Nationwide: from €9.95
Note: Larger telescopes which contain multiple boxes include an additional surcharge. Shipping is calculated automatically at the checkout.
- CLICK & COLLECT -
You can also avail of our FREE 'Click & Collect' service at the checkout, where you can order online and collect from our head office. Depending on the items and availability, these can be ready for collection within a few hours. "NOTE: Please wait until we let you know your order is ready before you arrive, to arrange a suitable time for collection."
Est. Delivery Time after Dispatch: 24 - 48 hrs
Standard Express Shipping: Norther Ireland: from €19.50+
Standard Express Shipping rate applies up to a max order weight of 30kg Nationwide. - Large heavy items from 30kg+ include an additional surcharge, depending on the overall weight.
Unfortunately due to Brexit we are currently unable to ship to Mainland UK at this time.
Est. Delivery Time after Dispatch: 24 - 72 hrs
Standard Express Shipping: European Union: from €18.95+
Shipping available for items upto a max order total weight or volumetric weight of 27kg.
If your country is not listed below please contact us for more information.
Standard EU Delivery Regions: Germany, France, Belgium, Poland, Luxumbourg, Netherlands, Sweden, Denmark, Portugal, Spain, Austria, Italy, Poland, Czech Republic, Croatia, Malta, Greece
US & CANADA
Est. Delivery Time after Dispatch: 48 - 72 hrs
Standard Express Shipping: US & Canada: from €28.50+
Shipping service available for items upto a max order total weight or volumetric weight of 20kg.
* Customs / Import duties may apply in these regions. For more information please contact your local tax/customs office.
IMPORTANT: Its essential that when placing an order, you include a valid 'Contact Telephone Number' for the delivery address or for the person receiving the item. This is necessary to avoid potential delays or problems with your delivery.
Please Note: Delivery times listed above are estimated. These are calculated from when your order is Completed & Dispatched (not from when the order is placed) and times may also vary for some remote post codes. Delivery service takes place Mon-Fri (excl. Bank/Public Holidays).
Shipping Disclaimer: All of our parcels are sent via a 3rd party registered courier service to ensure safe and prompt delivery. While we endeavor to ensure that all parcels are delivered within the specified time frame, 'Horizon Astronomy' can not be held responsible for delays due to adverse weather conditions or other courier/technical related issues outside of our control.