A cheaper camera might be able to go to 800 or 1600 ISO before getting really grainy and noisy, while a more expensive camera can go up to 3200, 6400, 10,000, and beyond and still be pretty usable.
較便宜的相機可能只能達到 800 或 1600 的 ISO,然後就會出現嚴重的顆粒感和噪點,而較昂貴的相機可以達到 3200、6400、10000 甚至更高的 ISO,而且仍然非常可用。