- Express delivery within the EU
- Item Available, ready to ship
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:
5 - 7 Working days after dispatch
Standard Tracked Delivery:
Republic of Ireland Nationwide: from €8.95 upwards
Note: The exact shipping charge will depend on the size of your order and will be calculated at the checkout. Some large and bulky Telescopes may also be shipped to you directly from our Manufacturer. This is a special agreement we have with our suppliers to ensure our customers enjoy the cheapest possible shipping rates for large bulky Telescopes.
For some very large Telescopes over 45kg, it may require special handling instructions and you will be asked at the checkout to contact us for a special delivery quotation.
Mainland EUROPE (EU)
Est. Delivery Time:
3 - 5 Working days after dispatch
Standard Tracked Delivery:
Mainland Europe: from €4.95 upwards
Note: The exact shipping charge will depend on the size of your order and will be calculated at the checkout. Some large and bulky Telescopes may also be shipped to you directly from our Manufacturer. This is a special agreement we have with our suppliers to ensure our customers enjoy the cheapest possible shipping rates for large bulky Telescopes.
For some very large Telescopes over 45kg, it may require special handling instructions and you will be asked at the checkout to contact us for a special delivery quotation.
EU Additional Info:
If your country is not listed below please contact us for a specialised quote.
Standard EU Delivery Regions:
Germany, France, Belgium, Poland, Luxembourg, Netherlands, Denmark, Portugal, Spain, Austria, Italy, Poland, Croatia, Malta, Greece, Monaco.
IMPORTANT: It is essential when placing an order, that 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, return delivery costs 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.