Askar LRGB 2-Inch Filter Set for Monochrome Astrophotography

Elevate your astrophotography with the Askar LRGB 2-Inch Filter Set, meticulously engineered for use with monochrome cameras featuring CMOS and CCD sensors. This premium filter set is essential for capturing stunning celestial images with unparalleled accuracy and clarity.

Product Highlights

Each filter is crafted from high-quality glass with a precise thickness of 1.85 mm, ensuring exceptional performance:

• High Transmittance: Achieves over ± 90% transmittance within the specified spectral range.
• Effective Light Blocking: Provides excellent light-blocking capabilities for wavelengths outside the filter window.
• Light Pollution Reduction: Maximizes separation for G and R filters to minimize interference from sodium lamp spectral lines.
• Quality Assurance: Each filter undergoes rigorous testing to meet technical specifications.

Key Features of Askar LRGB 2 Filters

• Comprehensive set of four filters tailored for astrophotography with monochrome CCD and CMOS cameras.
• High transmittance within the pass band and optimal optical density across the remaining spectral range.
• Parfocal compatibility with other astrophotographic filters.

Technical Specifications

• Filter Type: Bandpass filter, LRGB.
• Application: Monochrome CCD and CMOS cameras.
• Filter Diameter: 2".
• Filter Thickness: 1.85 ± 0.1 mm.
• Filter Shape: Round.
• RGB Channels Weights: 1:1:1.
• Maximum Transmission for L Filter: > 95%.
• Maximum Transmission Range for L Filter: 400 - 695 nm.
• Equivalent Optical Density for L Filter: OD3.
• Blocking Range for L Filter: 300 - 385 nm / 720 - 1050 nm.
• Maximum Transmission for R Filter: > 93%.
• Maximum Transmission Range for R Filter: 598 - 693 nm.
• Equivalent Optical Density for R Filter: OD3.
• Blocking Range for R Filter: 300 - 583 nm / 713 - 1100 nm.
• Maximum Transmission for G Filter: > 93%.
• Maximum Transmission Range for G Filter: 500 - 580 nm.
• Equivalent Optical Density for G Filter: OD3.
• Blocking Range for G Filter: 300 - 380 nm / 595 - 1050 nm.
• Maximum Transmission for B Filter: > 90%.
• Maximum Transmission Range for B Filter: 395 - 500 nm.
• Equivalent Optical Density for B Filter: OD3.
• Blocking Range for B Filter: 300 - 380 nm / 520 - 1050 nm.
• Surface Quality Index: 60/40.
• Parallelism: 30".
• Light Incidence Angle: 0 - 8°.
• Frame Finish: Matte black, anodized.
• Holder Thread: M48x0.75.

Elements Included in the Set

• Askar RGB R Filter (Red) 2".
• Askar RGB G Filter (Green) 2".
• Askar RGB B Filter (Blue) 2".
• Askar L Filter (Luminance) 2".

Guarantee

Your purchase is protected by a 24-month guarantee, ensuring confidence in the quality and durability of the Askar LRGB 2 filters.