【Overview】 This is a self-made rear soft filter for astrophotography (photo 1). It is made by evenly spraying a transparent resin onto a PET sheet. Since its release, it has been used by over 160 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】 Photo 2 was taken of the night sky without a filter, photo 3 was taken with a LEE No.3 filter, and photo 4 was taken with the self-made "Medium" filter. 【How to Use】 This filter is used by attaching it to the rear of the lens. Cut it with scissors and secure the sides with double-sided tape or similar. It can be used in either direction, regardless of front or back. Refer to photo 5 for how to attach it to the lens. 【Compatibility】 Refer to the table in photo 6 for compatibility with filters sold by various manufacturers. 【Shooting Equipment】 Camera: Canon EOS 6D Mark II Lens: Canon EF 16-35mm f/2.8L II Single shot Development software: Lightroom Classic 【Other】 While we manufacture with the utmost care, please refrain from purchasing if you are looking for a perfect product. Delivery will be via regular mail, so please allow approximately 5 days if it includes weekends or holidays.