#Japan #Shinjuku, Tokyo #Sightron Japan #Dual BP EX II #Nebula Filter

Sightron Japan's Latest Innovation: Dual BP EX II Filter

Astronomy enthusiasts living in urban environments often face challenges when it comes to stargazing, particularly due to light pollution. However, Sightron Japan has recently announced the release of the Dual BP EX II Filter on August 12, 2026, designed specifically to produce high-contrast images of nebulae, even in cities. This innovative interferometric filter allows for capturing stunning celestial details that were previously difficult to obtain amidst urban light interference.

Release Details

• - Product Name: Dual BP EX II Filter 48mm
• - Retail Price: Open pricing, with an estimated market price around ¥25,000 (including tax)
• - Release Date: August 12, 2026

It's important to note that while the expected market price is an estimate by the company, the actual retail price may vary.

Features of the Dual BP EX II Filter

The Dual BP EX II Filter is engineered to transmit light from two primary emission lines—Hα and OIII—while effectively cutting off other wavelengths. This functionality makes it ideal for photographing nebulae, ensuring that even those situated in light-polluted areas can achieve remarkable results. What sets this filter apart from its predecessor, the Dual BP Filter, launched in 2021, is a complete redesign aimed at enhancing performance and color balance.

Specialized Transmission

This filter stands out by focusing on the emission lines of Hα and OIII. Specifically, it transmits wavelengths at 495.6nm and 500.7nm for OIII, allowing for better quality imagery. The half-width of both OIII and Hα emissions is maintained at 12nm, a specification crucial for optimal performance.

Reduced Halo and Ghosting

Using cutting-edge coating technologies, Sightron Japan has significantly minimized halo and ghosting effects that typically compromise image quality. The manufacturing process employs the latest deposition instruments, resulting in a filter that rival's traditional models in performance.

Quality Made in Japan

The Dual BP EX II Filter utilizes synthetic quartz glass, which is stronger and possesses superior heat-resistance compared to standard optical glass. During coating, this material minimizes thermal distortion, resulting in remarkably high surface precision.

Note: The above transmission characteristics are design specifications; variations might occur within stipulated standards.

Important Notes

• - Users should be aware that the filter's compatibility may vary depending on the shape of their telescope or lens.
• - Given the nature of interferometric filters, performance may depend on the angle of incident light; thus, coupling this filter with telephoto lenses or telescopes is recommended. If used with a wide-angle lens, light balance and color consistency might not be uniform.
• - Adjustments to color balance in captured images may be necessary using commercially available image processing software.
• - Specifications may be subject to change without prior notice due to enhancements.

Specifications

• - Filter Thread Diameter: 48mm
• - Thread Pitch: 0.75mm
• - Glass Thickness: 1.5mm
• - Country of Manufacture: Japan

For inquiries regarding the product, contact Sightron Japan at the Sales Division: 03-6908-3112. Please note that this filter will be available exclusively through specialized astronomy retailers and Sightron Japan’s direct outlets.

Company Background

Founded in 1961, Sightron Japan has established itself as a reputable supplier of optical products, including binoculars and telescopes. The company is known not just for the production and sale of optical instruments but also for representing world-class telescope manufacturers in Japan. Additionally, Sightron Japan collaborates with corporations and municipalities to host star gazing events and workshops.

For more information about their products, visit Sightron Japan.