Askar 1,25" LRGB filter set

The Askar LRGB 1.25" filter set is specifically designed to work in tandem with monochrome cameras equipped with CMOS and CCD sensors for astrophotography. These filters are crafted from high-quality glass substrates, each with a thickness of 1.85 mm, ensuring exceptional performance. Notably, they boast an impressive transmittance rate, exceeding ± 90% within their specified spectral ranges. Equally important, these filters effectively block out unwanted light wavelengths outside their designated filter windows.

To combat the predominant source of light pollution stemming from sodium lamps, the G and R filters have been meticulously designed to maximize their transmittance at specific wavelengths while minimizing interference from these sources.

To ensure stringent adherence to technical specifications, each filter undergoes rigorous individual testing in the manufacturer's laboratory.

Key Features of Askar LRGB 1.25" Filters:

• A comprehensive set of four filters tailored for astrophotography with monochrome CCD and CMOS cameras.
• Exceptional transmittance within their pass bands and high optical density for the rest of the spectral range.
• Parfocal compatibility with other astrophotographic filters.

Technical Specifications:

Filter Type: Bandpass filter, LRGB

Application: Monochrome CCD and CMOS cameras

Filter Diameter: 1.25"

Filter Thickness: 1.85 ± 0.1 mm

Filter Shape: Round

RGB Channels Weights: 1:1:1

Maximum Transmission for the L Filter: >95%

Maximum Transmission Range for the L Filter: 400 - 695 nm

Equivalent Optical Density for the L Filter: OD3

Blocking Range for the L Filter: 300 - 385 nm / 720 - 1050 nm

Maximum Transmission for the R Filter: >93%

Maximum Transmission Range for the R Filter: 598 - 693 nm

Equivalent Optical Density for the R Filter: OD3

Blocking Range for the R Filter: 300 - 583 nm / 713 - 1100 nm

Maximum Transmission for the G Filter: >93%

Maximum Transmission Range for the G Filter: 500 - 580 nm

Equivalent Optical Density for the G Filter: OD3

Blocking Range for the G Filter: 300 - 380 nm / 595 - 1050 nm

Maximum Transmission for the B Filter: >90%

Maximum Transmission Range for the B Filter: 395 - 500 nm

Equivalent Optical Density for the B Filter: OD3

Blocking Range for the 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: M28.5x0.6

Components Included in the Set:

Askar RGB R filter (red) 1.25"

Askar RGB G filter (green) 1.25"

Askar RGB B filter (blue) 1.25"

Askar L filter (luminance) 1.25"

Guarantee:

A generous 24-month warranty is provided for peace of mind and quality assurance.