Pentax Espio Espio Manual - Page 19

3 While depressing the shutter release but ton halfway, re-aim the camera or recompose the picture, then release the shutter. Note: • You can release focus-lock simply by lifting your finger off the shutter release button. Hard-to-autofocus subjects Like many other autofocus cameras, the camera's autofocus system is highly precise, but not perfect. Some subjects may not be focused as you wish. In such a case, use the focus-lock technique on a subject near the actual one and equidistant from the lens. Subjects which may fool the system include: 1. Black objects like hair, which don't reflect much light (and therefore don't reflect infrared autofocus beams). 2. Wire netting, latticework, iron exercisebars, etc. 3. Flickering light sources such as neon signs, fluorescent lamps, TV images, sunlight coming through trees, etc. and subjects illuminated by these light sources. 4. Glossy and reflective surfaces like glass, mirrors, car bodies, etc. 5. Fast-moving objects, like trains or automobiles in motion. 6. Water jets, water surface, smoke, flame, fireworks, etc., which have no distinct or consistent form, or a subject in mist. 15