Pentax IQZoom 90WR IQZoom 90WR Manual - Page 22

Hard-to-autofocus subjects Like many other autofocus cameras, the camera's autofocus system is highly precise, but not perfect, so some subjects may not focus 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 land therefore don't reflect infrared autofocus beams). 2. Wire netting, latticework, iron exercise-bars, 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 in motion. 6. Water jets, water surface, smoke, flame, fireworks, etc., which have no distinct or consistent form, or a subject in mist. (18 8. INFINITY-LANDSCAPE SHOOTING .1 When you wish to take a sharp picture of a distant landscape or a distant subject through a window, releasing the shutter while keeping the infinitylandscape button depressed allows you to take distant scenery with clarity. • If the green lamp lights up after you press the shutter button halfway while keeping the infinitylandscape button pressed, the infinity-landscape mode is locked even if you raise your finger off the infinity-landscape button. • To use the infinity-landscape mode, first press the infinity-landscape button and then the shutter release button while pressing the infinity-landscape button. • When taking pictures in low light, switch to slowshutter-speed mode (Flash-OFF model (see page 241.