【Overview】 This is a self-made rear soft filter for astrophotography (photo 1). 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 200 customers. 【Size and Material】 Size: 105mm x 100mm Thickness: 100μm (0.1mm) Material: PET (harder than polyester and more scratch-resistant) 【Actual Shooting Examples】 Photo 2 is a picture of the starry sky taken without a filter, photo 3 was taken with a LEE No.3 filter, and photo 4 was taken with the self-made filter "Medium". By comparing photos 3 and 4, you can see that the effect is almost the same as the genuine product. 【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. It can be used in either direction, regardless of front or back. Refer to photo 5 for how to attach it to the lens. (If there is a mount on the rear side of the lens, adjust the size to fit the mount.) 【Compatibility】 Please refer to the table in photo 6 for compatibility with filters sold by each manufacturer. 【Shooting Equipment】 Camera: Canon EOS 6D Mark II Lens: Canon EF 16-35mm f/2.8L II Single shot Development software: Lightroom Classic 【Other】 We make every effort to manufacture these with the utmost care, but please refrain from purchasing if you are looking for a perfect product. Delivery will be via regular mail, so it may take about 5 days if it falls on weekends or holidays. Due to rising material costs, we have slightly increased the price.