The SVBONY SV127 1.25″ Four-Colour Planetary Filter Set is designed to enhance contrast and reveal subtle surface and atmospheric details on the Moon and planets. By selectively transmitting specific wavelengths, each filter helps improve visibility of particular features that may otherwise appear washed out.

Key Features

• Standard 1.25″ Filter Thread
  M28.5 × 0.6 thread fits most 1.25″ eyepieces, Barlow lenses, and accessories.
• Purpose-Selected Planetary Colours
  Includes Deep Yellow, Red, Green, and Medium Blue filters for targeted contrast enhancement.
• Improves Planetary & Lunar Contrast
  Helps separate subtle tonal differences on planets and the Moon by reducing glare and scattered light.
• Optical Glass Construction
  Precision-made glass substrates with coatings designed for visual observation.
• Ideal for Visual Observing
  Designed for eyepiece use rather than imaging; best results achieved visually.

Included Filters & Their Uses

• #15 Deep Yellow
  Enhances lunar contrast, improves visibility of red and orange features on Mars, Jupiter, and Saturn, and helps reveal low-contrast cloud detail on Venus.
• #25 Red
  Accentuates Martian surface features, enhances cloud detail on Venus, and improves contrast in bluish cloud regions on Jupiter and Saturn.
• #58 Green
  Enhances contrast of red and blue structures, highlights Jupiter’s Great Red Spot, and improves visibility of Martian polar ice caps.
• #80A Medium Blue
  Improves definition in Jupiter’s belts, enhances Martian polar caps, and increases contrast in lunar surface features and Venusian clouds.

How Colour Filters Improve Observing

Planetary colour filters work by selectively blocking certain wavelengths while transmitting others. This increases contrast between different surface features and atmospheric structures, making subtle details easier to detect at the eyepiece.

Optical Quality & Construction

Each filter is manufactured from optical-grade glass and mounted in a precision metal cell, ensuring consistent performance and secure attachment during use.

Typical Use Cases

• Lunar observing and surface contrast enhancement
• Planetary observing (Mars, Jupiter, Saturn, Venus)
• Visual observation with refractor, Newtonian, or SCT telescopes
• Observers wishing to experiment with contrast control

What’s Included

• #15 Deep Yellow 1.25″ filter
• #25 Red 1.25″ filter
• #58 Green 1.25″ filter
• #80A Medium Blue 1.25″ filter

Key Specifications

• Filter size: 1.25″
• Thread: M28.5 × 0.6
• Optical type: Visual colour filters
• Primary use: Planetary & lunar observation

Compatibility Notes

• Designed for visual use at the eyepiece
• Compatible with most 1.25″ eyepieces and Barlows
• Not intended as LRGB imaging filters