Light pollution reduction & constellation emphasis This single filter allows you to get the effects of Starry Night and Prosofton (astrological photos), which are often used for stacking astroscopic photography, and the effects of Starry Night (light pollution reduction), and Prosofton (astrological signs). Benefits of reducing the hassle of stacking and vignetting The soft effect is equivalent to "PRO1D Prosoft Clear (W)". It is perfect for starry photos when you want to see clear scenery in starry photos while minimizing the soft effect on the scene. ■ Reduces color cabrie caused by street lighting: Due to the effect of street light such as sodium and mercury lights, the night sky may appear in yellow or orange. Light pollution reduction filters reduce color cobli and allow natural color reproduction. It also reduces the effects of light damage to the night sky, which makes the sky darker and increases contrast with the stars. Even if you finish your work with developmental softness, you can benefit from cutting light damage pre-cut filters to reduce the work process and make RAW easier to develop. ■ The Star Night Prosofton is not only a light pollution reduction effect but also a soft effect equivalent to "PROSOFT CLEAR". The zodiac sign with the naked eye is too sharp with a digital camera and the star brightness and color are difficult to understand. "Prosofton" reveals bright stars and raises the constellations. You can also highlight the colors of the stars. Prosofton Clear has a soft effect of "Prosofton (A)" in about half that does not bother the soft effect of the scenery, so it is a "starry photos" that shows the starry sky and scenery together, making it ideal for when you dont want to apply a soft effect to mountain or architecture. ■ Perfect for Starry and Night Scene Photography Starry Night Prosofton has no limit to the focal length of the lens used and wide angle lenses will not cause color change, making it ideal for starry photography. It is also great for shooting at night scenes and time lapse shots that are difficult to finish after-processing. ■ No need to worry about stacking or vignetting - You can get the effects of 2 filters with a thin frame design, so you dont have to worry about stacking them and reducing vignetting. Because the frame is thicker when you stack two filters together, there may be vignetting (black shadow) in the corners when using ultra-wide angle lenses, but a single filter can virtually eliminate the possibilities. It also prevents unwanted ghosting and flares by not stacking.