The problem is, timecode alone, while sufficient to provide syncing points for post production, may not be a reliable way to keep devices in sync with each other. With timecode, unless the cameras or recorders are re-jam-synced frequently, their timecode will start to drift apart. The problem is that the quartz crystal (or other piezo-electric material) clocks used in many cameras and quite a few audio recorders are too imprecise for critical applications.
Roller Naps. Paint roller nap sizes range from 1/4 to 1/2 inches in length. When painting a ceiling, the selection of a roller nap size depends on the surface of the ceiling. In general, a ceiling with a matte, flat, or eggshell finish calls for a roller nap of between 3/8 and 5/16 inches. If the ceiling is more textured, however, a longer nap may be called for.
Paint rollers are popular for many interior and exterior projects due to the speed of application and versatility they provide. Since most wall paints are formulated for roller application, you will be able to create a smooth finish faster using a paint roller. To choose a quality paint roller, you should consider two features: roller cover material and roller nap length. Paint roller covers (or sleeves) are made from three types of materials: lamb's wool, synthetic fabric and foam.