Antlia LRGB Dark Series 2 Filter Set (4 filters) all astro filters opinie

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The Antlia LRGB Dark series 2" is a set of four LRGB filters designed for full visible-spectrum deep-sky imaging, providing high contrast and a high signal-to-noise ratio. The LRGB Dark series uses precisely defined passbands and high-quality quartz-glass substrates with very low thermal expansion to minimize star deformation under changing environmental conditions.

Key features

• set of four LRGB filters (Luminance, Red, Green, Blue) in 2" mounted cells
• full visible-spectrum design with well-defined passbands: L 400–710 nm, R 595–705 nm, G 495–605 nm, B 410–505 nm
• high peak transmission: L/R/G about 97%, B about 95%
• quartz-glass substrate with very low thermal expansion coefficient
• out-of-band blocking rated at least OD4.5 (0.005%) to suppress unwanted wavelengths
• advanced optical coatings applied all the way to the substrate edge for maximum uniformity and stability
• double-sided fine polishing to maintain parfocality and excellent image quality
• scratch-resistant coatings designed for safe cleaning and long-term durability
• L filter designed as a Luminance (UV/IR cut) filter with blocking outside 400–710 nm
• parfocal and compatible with Antlia SHO 2.5 nm Ultra Narrowband filters (same substrate type and refractive index)
• black anodized cells with durable laser-engraved markings
• intended for astrophotography use only, not recommended for visual observing

Included items

• Antlia Luminance LRGB Dark series 2" filter
• Antlia Red LRGB Dark series 2" filter
• Antlia Green LRGB Dark series 2" filter
• Antlia Blue LRGB Dark series 2" filter

Technical specifications

• type: LRGB filter set for astrophotography (L, R, G, B)
• filter size: 2" (mounted)
• Luminance passband: 400–710 nm (UV/IR cut)
• Red passband: 595–705 nm
• Green passband: 495–605 nm
• Blue passband: 410–505 nm
• peak transmission: L/R/G about 97%, B about 95%
• off-band blocking: ≥OD4.5 (0.005%)
• substrate: quartz glass
• construction: edge-to-edge coated, finely polished optical surfaces
• durability: scratch-resistant, cleaning-safe coatings
• not recommended uses: solar imaging, visual observation

Warning: NEVER look at the Sun with the Antlia LRGB Dark series 2" filter set. Ignoring this warning can cause serious and permanent eye damage.