Player One Photosphere 7,5 nm filter (SKU: PS125-7nm) all astro filters opinie

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The Player One Photosphere 7.5nm 1.25" filter (SKU: PS125-7nm ) is an enhanced version of the green-continuum narrowband filter for imaging the solar photosphere in white light. It transmits a very narrow band of ≈ 7.5 nm around 540 nm, providing better contrast and detail of granulations and sunspots than standard broadband filters. This version is based on a precision optical substrate and next-generation multilayer coatings optimized for use with CMOS and CCD cameras.

Highlights of the 7.5nm Photosphere

• FWHM ≈ 7.5 nm transmission band located around 540 nm
• transmission in the band ≈ 97% – exceptionally high contrast of photosphere details
• effective out-of-band blocking (OD4) – suppression of light outside the working range
• high-quality dielectric coatings – parameter stability and scratch resistance
• optical substrate with flatness λ/4 – no wavefront deformation at large apertures
• 1.25" thin bezel (M28.5 x 0.6) - compatible with Player One filter wheels and filter drawers

Technical specification

• Diameter/housing: 1.25" - thread M28.5 × 0.6, total thickness 7.5 mm
• substrate: optical glass, filter thickness 2.5 mm
• central band (CWL): 540 nm
• full width half-width (FWHM): 7.5 nm
• transmission in band: ≈ 97%
• Band lock: OD4 (attenuation ≥10⁴)
• coatings: multilayer dielectric
• flatness: λ/4 (632.8 nm)

The Photosphere 7.5nm filter produces exceptionally detailed images of the Sun when used with Herschel wedges or ND 3.0 film. It can be used with both monochrome and color cameras, offering high contrast and sharpness even in unfavorable seeing conditions.