Hi! I have a 14" f/9 Apo-Ronar barrel lens mounted on a 6" board for an 8x10 Kodak 2D. A test shot of some book titles on the shelf looks good and the aim is to use this lens for portraits. So after months of searching eBay for a Packard shutter, google search found www.packardshutter.com. I called them up, talked for 20 minutes to the owner, Reno, who carefully explained what would fit. I'm getting one and can hardly wait to squeeze that rubber bulb! These shutters were generally used before my time and would like to hear other's experiences with these classic shutter. Rich