【Overview】 This is a set of self-made rear soft filters for astrophotography: "Weak," "Medium," and "Strong" (Photos 1-3). By attaching it to the rear side of a wide-angle lens, it suppresses the streaking of stars in the four corners of the screen and has the effect of making bright stars appear larger. Since its release, it has been used by over 170 customers. 【Size and Material】 Size: 105mm x 100mm Thickness: 125μm (0.125mm) Material: PET (more rigid than polyester and less prone to scratches) 【Actual Shooting Examples】 Photos 4-6 show actual shooting examples of Weak, Medium, and Strong. (The focal length used for the Weak example is slightly different.) 【How to Use】 This filter is used by attaching it to the rear side of the lens. Cut it with scissors and fix the sides with double-sided tape or similar. It can be used in either direction, regardless of front or back. Refer to Photo 7 for how to attach it to the lens. (If there is a mount on the rear side of the lens, insert it into the mount.) 【Compatibility】 Refer to the table in Photo 8. 【Other】 We manufacture with the utmost care, but please refrain from purchasing if you are looking for a perfect product. Delivery will be via regular mail, so please note that it may take about 5 days if it falls on weekends or holidays.