2-1/4 x 3-1/4 Format. Takes 620 film so roll your own. Glass clean and clear but shutter sticky at 1/25 and down. 50, 100 and 200 sound good. Shutter release thru body release button does not work. I cut the connector to get the lens to get it serviced but never did. Easy fix with a little epoxy or JB Weld or use a cable release. Lens is a 103mm F4.5 Anastigmat. Single coated. Asking $20 + shipping.