【Overview】 This is a set of self-made rear sheet filters "Medium" and "Strong" for astrophotography, created as a replacement for the discontinued Lee rear soft filters. (Photos 1-2) 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 3 was taken without a filter, photo 4 was taken with the self-made "Medium" filter, and photo 5 was taken with the self-made "Strong" filter. 【How to Use】 This filter is used by attaching it to the rear side of the lens. Cut it with scissors, etc., and fix the sides with thick double-sided tape. It can be used in either direction, regardless of front or back. Refer to photo 6 for an example of how to attach it. 【Compatibility】 Refer to the table in photo 7 for the strength 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 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 it may take about 5 days if it falls on a weekend or holiday. Please understand.