Lee Filters, the manufacturer of the popular Lee 100 filter system is offering a free filter ring when buying a Lee 100 Holder [affliate link]. You can choose either a standard ring fitting 49-82mm filter threads or the usually more expensive wide angle type over 43-82mm. As most of the new pro-grade lenses, such as the Canon RF 50/85mm and the ‘zoom trinity’ have 82mm filter threads, it’s a good opportunity to get an 82mm WA ring for free. The offer closes on the 31st March.