Found an unidentified large lens on eBay for about $9 per pound. The glass appears flawless and it seems to have a focal length of around 12″ and an exit diameter of about 3.5″ making it in the neighborhood of f 3.4 crudely calculated. Might work for 8×10 based its apparent coverage circle (once I make a brawny enough camera to carry it – it weighs 7.5 pounds)). That is a far future project however as I am still refining my ability to do 35mm and sixth plate.
Lasersaur, the new open source laser cutter from Nortd Labs. Finally a precision cutting machine within reach… (a long reach, but at an order of magnitude less than prior costs for an equal sized machine). Check it out at at http://labs.nortd.com/lasersaur/
Now I’m off to the laser cutting class at TechLab SF.