Antlia LRGBR+ Dark series 2 set of filters (5 filters) all astro filters opinie

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Antlia LRGBR+ Dark series 2" is a complete set of LRGB filters dedicated to use in professional astrophotography sets. arrays with high quantum yield in the near infrared range.

Each of the filters included in the set, with the exception of the R+ filter, was made on a quartz glass substrate with a thickness of 2 mm, which guarantees not only adequate mechanical strength, but also full parfocal ¶æ. In the case of an additional R+ filter dedicated to registration of radiation in the range of 700 - 1000 nm, we are dealing with an HWB type substrate, dedicated to optics operating in the infrared range. The filters are fully parfocal and excellent results can be obtained by combining them with Antlia SHO 2.8 nm and 2.5 nm Ultra filters, which are also made on quartz substrates, same refractive index.

Attention! Antlia LRGBR+ Dark series filters are not recommended for use in visual observations.

Highlights of the Antlia LRGBR+ Dark series 2" filter set

• professional astrophotographic filters enabling achieving high sensitivity in the full range from UV to IR
• additional R+ filter to improve sensitivity in the infrared range
• substrate made of quartz glass with excellent thermal stability and high mechanical strength
• high precision of workmanship guaranteeing full parfocality
• optical density equivalent OD4.5 guaranteeing high efficiency of light pollution removal and halo reduction around bright stars

Technical parameters

• type of filters: LRGB bandpass filters
• Filter diameter: 2"
• filter thickness: 2 ± 0.05 mm
• filter shape: round
• maximum transmission for L filter: 97%
• transmission range for the L filter: 390 - 710 nm
• maximum transmission for filter R: 97%
• transmission range for the R filter: 595 - 705 nm
• maximum transmission for the R+ filter: 95%
• transmission range for the R+ filter: 700 - 1000 nm
• maximum transmission for filter G: 97%
• transmission range for the G filter: 495 - 600 nm
• maximum transmission for filter B: 95%
• transmission range for filter B: 400 - 505 nm
• optical density equivalent for blocked bands: >OD4.5 (0.005%)
• substrate material: quartz glass / HWB glass (R+ filter)
• thread: M48x0.75

Set elements

• Antlia LRGBR+ Dark series 2" L filter (luminance)
• Antlia LRGBR+ Dark series 2" R filter (red)
• Antlia LRGBR+ Dark series 2" R+ filter (red)
• Antlia LRGBR+ Dark series 2" G filter (green)
• Antlia LRGBR+ Dark series 2" B filter (blue)

Guarantee

Three-year manufacturer's warranty (for filter and substrate delamination)