CZK2820/3 specifications: Focal Length: 2. 8mm F. No.: 2. 0 F. A. Diagonal: 92? M. O. D.: 0. 2m Format: 1/3" Mount: CS Dimension: Φ 30?124 mm Weight: 84. 0g This model has been holding the best quality of Chinese-Made same type and with rather competitive price. We are sorry that some of our buttony pinhole lenses are out of sales right now, but the good news is we plan to design more new models according to market feedback, so if you have any suggestion or specail needs in this pinhole lens, please be free to contact us via email or telephone. We promise to serve our best to every client. Thank you for reading.