نقل قول:
Sony A580 AF Assist
The Sony A580 uses its built-in flash head as a very bright AF-assist light for better focusing in dim lighting. This has the advantage that the light from the flash is very bright, but the downside is that you can only get AF assist when the flash head is raised. This is a real limitation for available-light photography, as the camera can expose at light levels well below those it can focus at. (Although its low-light focusing ability is much better than average.) If the camera is fixed on a tripod, you can work around this limitation, but it's somewhat awkward. With the flash head up, you must half-press the shutter button to make the camera focus, then switch the focus mode to manual focus, being careful not to touch the focus ring on the lens. Stow the flash head, and you can then take your picture. (But don't forget to switch back to AF mode for the rest of your shooting!)