【Overview】 This is a homemade rear sheet filter for astrophotography, created as a replacement for the discontinued Lee Rear Soft Filter No. 4. (Photo 1) The yield has improved, so the price has been slightly reduced. 【Size and Material】 Size: 105mm x 100mm Thickness: 125μm (0.125mm) Material: PET (Harder than polyester and more scratch-resistant) 【Actual Shooting Examples】 Photo 2 is a shot of the starry sky without a filter, Photo 3 was taken with a LEE No. 3 filter, and Photo 4 was taken with the homemade "Strong" filter. I cannot provide links here, so please search for "sakuranomasu" on social media for other examples. 【How to Use】 This filter is used by attaching it to the rear of the lens. Cut it with scissors, etc., and secure the sides with slightly thick double-sided tape. It can be used in either direction, regardless of front or back. Refer to Photo 5 for attaching it to the lens. 【Compatibility】 Refer to the table in Photo 6 for the strength 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 note that it may take about 5 days if it falls on a weekend or holiday.