45mm/2. Camera is in excellent cosmetic and optical condition. No dents or scratches and glass is clean & clear. RF patch has good contrast. Meter responds to light changes, but at this age, can't be considered reliable. Comes with ERC, also in excellent condition. All being said, this does have a *frame spacing issue*. It has been on the shelf for quite some time, so maybe only needs exercising? A sample photo, of a properly spaced frame is shown. This was taken in difficult light and Very expired Fuji 400/mini lab'd. If you are a DIY'er, this would make a super nice rf. $35 plus ship.