Pentax 645 645 Manual - Page 18

• Should dust, foreign bodies or film residues collect on the film holder or within the film holder chamber of the camera body, they may inadvertently register photographically; clean them off carefully to prevent problems. Should film residue or dust collect at the contact point (for film detection) located on the pressure plate side of the film holder, the motor will continue to rotate idly after all remaining frames have been exposed. However, in approximately 30 secs., the motor will stop turning. When the motor stops and the ON-OFF operation of the main switch is repeated, the motor will again be activated in idle rotation; however, avoid doing this, since it may cause problems with the film winding mechanism. After switching off, remove the film holder and clean the contact point of the pressure plate. • Should the film winding operation stop before all available frames have been exposed, recheck the batteries in order to locate the possible cause of the problem • When using accessories without information contacts, set the aperture ring to the appropriate f/stops, with the exception of the "A" (auto) position which cannot be used under this situation. 16 0 Or o 0 Keep it clean! Don't change the film in mid-roll ' z