Our company is involved in preparing official permits from the Polish Ministry of Development and Technology, which allows us to export all dual-use drones, optics, and portable radiophones without VAT on the Polish side / and without VAT on the Ukrainian side.
Optolong L-Extreme 2" dual band filter
263.38 $ net price (non-EU countries)
Anatolii Livashevskyi
Product Manager
/ 
+48721808900
+48721808900
+48721808900
[email protected]
Description
Optolong L-Extreme 2" Dual-Band Astronomy Filter
The Optolong L-Extreme 2" Dual-Band Astronomy Filter is an exceptional tool for astrophotographers aiming to capture breathtaking images of bright emission nebulae. Specifically designed for use with digital SLRs and monochrome cameras, this filter excels in high light pollution areas.
Unmatched Transmission and Clarity
This filter offers an impressive transmission rate of over 90% for the spectral lines emitted by ionized hydrogen (Hα) and oxygen (OIII) atoms. With a narrow half-width of only 7 nm, it effectively separates the OIII line from Hβ, ensuring sharp and high-contrast images even near densely populated urban areas.
Enhanced Contrast and Light Pollution Suppression
The Optolong L-Extreme 2" filter is engineered to significantly enhance contrast, making it ideal for use during brightly moonlit nights or when photographing emission nebulae near intense stars. Its narrow bandwidth and efficient suppression of sodium and mercury lamp emissions ensure superior image quality.
Exceptional Durability and Optical Performance
To enhance optical performance, the filter is coated with a full multi-layer anti-reflection coating using advanced ion implantation techniques. This not only ensures exceptional optical quality but also provides remarkable durability and scratch resistance.
Key Features:
- Dual-band filter: High transmission for Hα and OIII lines.
- Light pollution blocking: Over 99% efficiency.
- Durable coating: Scratch-resistant multi-layer anti-reflective coating.
Technical Specifications:
- Filter Type: Dual-band filter.
- Filter Diameter: 2".
- Half Bandwidth: 7 nm.
- Pass Bands: Hα, OIII.
- Maximum Transmission: > 90%.
- Blocking Range: 300 - 1000 nm.
- Light Pollution Blocking Efficiency: > 99%.
- Filter Material: Schott B 270 glass.
- Coating Type: Full multi-layer coating (FMC).
- Filter Thickness: 1.85 mm.
- Surface Quality Index: 60/40.
- Parallelism: 30".
- RMS Execution Accuracy: λ / 4.
- Frame Material: Aluminum.
Kit Components:
- Optolong L-Extreme 2" Filter
Warranty:
24 months
Data sheet
Official permits of the Ministry of Development and Technology
Our company is involved in preparing official permits from the Polish Ministry of Development and Technology, which allows us to export all dual-use drones, optics, and portable radiophones without VAT on the Polish side / and without VAT on the Ukrainian side.