This filter combines the effects of "Starry Night (light pollution cut)" and "Pro Softon (constellation emphasis)," which are often used together when taking astrophotography photos. This offers the advantage of reducing the hassle of stacking filters and minimizing vignetting. The soft effect is equivalent to "PRO1D Pro Softon Clear (W)." While blurring bright stars, it minimizes the soft effect on the landscape, making it ideal for astrophotography when you want to capture the landscape clearly. * Multi-coating to suppress flare and ghosting caused by filter attachment * Black ink applied to the outer edge of the glass to suppress internal reflections * Thin frame design that minimizes vignetting when using ultra-wide-angle lenses * Knurled processing for easy attachment and removal * Lens cap can be attached * Exposure factor: 1/3 stop * Made in Japan 55mm Retail Price: ¥11,880 (tax included) I bought this for a trip to take photos of the starry sky, but the trip was canceled. I'm selling it to someone who can use it.