What's the construction? Is it a petzval? If the front is a cemented pair, it'll make a nice meniscus lens with FL about twice the lens, and lots of coverage (and funky effects). I have a set of photos on flickr from a lantern lens minus the rear elements. Before you do anything else, try reassembling the two halves into the frame and shooting through it. You can also paint the broken edges with a sharpie (which is easily removed). And, the attached photos were taken using the shown Goerz Syntor ( a 4 element dialyt type - I dropped the front while cleaning it). There's some ghosting and loss of sharpness but I didnt blacken the edges.
Last edited by Fotoguy20d; 05-13-2013 at 10:37 AM. Click to view previous post history.