They come in pairs. All images taken in Singapore's Chinatown with an Olympus PEN-EE2. Camera does 72 shots on a roll of 36. This little gem was sold to me second hand as not working for the stately sum of 8 Euros in 2014. The seller was not aware of the red-flag-test. The meter's selenium cell is still alive when the finder turns red upon pressing the shutter release. Turned out the camera was in perfect working order and the ideal camera to always have around when needed (tiny). Film was 35mm Kodak Tri-X 400 rated at box speed and developed in Caffenol for 15 minutes.