Petzval type unmarked brass projection lens Makiflex No iris by
Nokton48, on Flickr
Unmarked Petzval type beautiful brass Projection Lens vintage late 1800's? Central stop removed, very swirly beautiful bokeh. I'd guess 200mm focal length, I wanted speed and I'd guess about F3.5 wide open. Sharpest in the center, central bouquets were focused on and are sharp! Depth of Field is near nil. Orwo NP22 9x12cm I bought in bulk from Bulgaria. Voigtlander Makiflex Plate Holder pretty good match. RADA made plates from Plaubel and were hooked up with them for a good while. These tend to light leak and I'd retrapped a lot of plate holders, could maybe be improved? I also have some French and Russian Plate holders that seem to work as well. Yes it is sharp in the center only, that was my intention. Removing the central interior stop increased the swirly bokeh, and increased speed to about F3.5 or so. The central stop was blackened by a candle, the black soot got all over my fingers. NP22 developed in straight Legacy Mic-X Replenished. A Deep Tank Developer that lasts for many many years. DOF pretty much nonexistant. II carefully focused on the two flowers center right, and they look pretty sharp to me.