This effectively means local light pollution is much less significant and even imaging during a full moon is possible too as all other wavelengths outside of the specific Ha and OIII signal are blocked from entering the camera. The L-Ultimate filter is literally the ultimate filter for astrophotography under urban light polluted skies.
Features:
- Blocks the artificial light from mercury vapour lamps, both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (skyglow).
- Maximum transmission of the main nebula emission lines at OIII (496 nm and 500 nm) and H-alpha (656 nm)
- Two transmission bands with a bandpass of 3nm each
- Designed mainly for astrophotography with color cameras
- Also helpful with monochrome cameras, no need to change filters for catching both lines
- Ideal for urban areas with extreme light pollution
- It incorporates an IR/UV cut filter that is necessary in astrophotography, especially for astronomy cameras that are sensitive to the infrared radiation.
- Ultra-thin filter cell to maximise the compatibility with most filter wheels.
- Multi-layered anti-reflection coating
- No obvious halo around bright stars
- Cell in an aerometal material, CNC machined, sand blasted, black anodized and laser engraved
- Includes a PP plastic case, high pressure EVA case lining
The planetary rotation system offers precision and homogeneity of coatings ensuring high transmission of pass-band and high optical density off-band.
Spec:
- Transmitted lines: OIII (500.7 nm), H-alpha (656.3 nm)
- FWHM: 3nm
- Suitable for: 2" Filter threads
- Blocking range: 300 - 1000 nm (UV/IR cut)
- Blocking: >OD4
- Substrate: Optical glass made by Schott
- Substrate thickness: 2mm
- Surface quality: 60/40
- Optical flatness: λ/4 rms
- Parallelism: 30 arc sec
- AR coating: Multi layer
- Cell: Aluminum, black anodized
Whats included:
- L-Ultimate Filter
- Protective box, foam lined
REPUBLIC OF IRELAND
Est. Delivery Time after Dispatch:
24 - 48 hrs
Standard Tracked Delivery:
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."
NORTHERN IRELAND
Est. Delivery Time after Dispatch:
24 - 48 hrs
Standard Tracked Delivery:
Norther Ireland: from €19.50+
Additional Info:
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.
EUROPE (EU)
Est. Delivery Time after Dispatch:
24 - 72 hrs
Standard Tracked Delivery:
European Union: from €18.95+
Shipping available for items up to a max order total weight or volumetric weight of 27kg.
Additional Info:
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 Tracked Delivery:
US & Canada: from €28.50+
Shipping service available for items up to a max order total weight or volumetric weight of 20kg.
Additional Info:
* 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.
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.