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Key Features
Exclusive light pollution cut filter with scratch resistance
Avoid orangish or yellowish color shift by artificial light source
Outstanding maintenance performance, Water-/Oil-/Fingerprint-resistant
Double side Coating for low reflection
Lightweight and thin aluminum frame, Low profile & easy handling, non-rotating mount
Made in Japan
The Marumi StarScape is an exclusive light pollution cut filter of screw-in type.
The Star Scape filter cuts light pollution caused by artificial light sources to capture the true beauty of the starry sky.
Light pollution refers to artificial light sources such as;
- mercury lamps,
- sodium lamps,
- LEDs,
- fluorescent lamps,
- or Automobile headlights that brighten the night sky and make it difficult to see stars.
In modern inhabited areas, it is hard to see the Milky Way in urban cities, and when you actually take a picture, the night skyscape sometimes turns obviously yellowish. This color shift phenomenon is caused by, so to say, "Light Pollution".
This color shift makes the starscape-/nightscape photograph enthusiasts very annoyed.
The color shift phenomenon will be suppressed by kneading a component that absorbs unwanted light into the glass, t turning the overall image naturally bluish.
In addition, no matter which white balance is selected, there is no extreme color shift.
The brightness is a significant element for starscape photography, and it can be sufficiently secured at an exposure multiplier of 1.2 (about 1/4 stop).
The StarScape filter is also available in the M100 Square Filter System.
| Category | Screw-in |
| Model | Marumi StarScape |
| Type | Effect |
| Frame Material | Aluminum |
| Frame structure | Non-rotating |
| Frame structure | Thin frame |
The StarScape filter selectively absorbs specific wavelengths of strong light emitted by artificial urban light sources, which are the main cause of light pollution, while allowing the wavelengths from celestial bodies to pass through. This effectively cuts light pollution without compromising the colors of celestial objects.
Light pollution refers to artificial light sources such as:
The transmission curve above shows a decrease in transmittance for specific visible light wavelengths (400-700nm), such as mercury lamps (435.8, 546.1, 577.0, and 579.1 nm), sodium lamps (589 nm), and LEDs (approx. 470 nm). This indicates that these artificial light sources emit harmful orange and yellow light, which can interfere with astronomical observations and contribute to light pollution, making it difficult to see cold color stars in the night sky.
