Product Description
NOTE: The Hoya Starscape and Hoya Intensifier Filters use the exact same glass and filter frame. The only difference is the packaging and name. If you own an Intensifier filter there is no advantage to purchasing the Starscape filter. If you don't own either then learn more below.
This filter has many names; Starscape, Intensifier, Red Intensifier, Ra54, Light Pollution filter, "didymium" filter (technical term) and so on. In today's digital photography world it is most commonly used by astrophotographers to reduce the orange/yellow glow caused by city lights.
The filter targets specific wavelengths of light emitted by common Sodium and Mercury-vapor street lamps and blocks a portion of that orange/yellow glow as it passes through the filter. The effect can be dramatic or subtle depending on how strong the light source is and how much atmospheric haze is in the air.
- Reduces "light pollution" by blocking orange/yellow color spikes from city lights
- Improves contrast between stars and sky
- Also used to enhance fall colors without effecting green and blue colors
