Am going to get a flange made for my 42 inch Artar red dot lens. I have had the lens for several years. SK Grimes in the states will make it for $165 USD plus shipping. I can then use the lens on the Chamonix 16x20, the HF2024 and possibly the HF3535 via the universal Sinar lens board.
42 Inch Artar Red Dot Lens Story
