ISO Setting in DSLR Camera Rental

ISO in a DSLR camera refers to the sensitivity of the camera’s image sensor to light. It is usually expressed as a number, such as ISO 100, ISO 200, ISO 400, and so on. A higher ISO setting makes the sensor more sensitive to light, allowing you to capture images in lower light situations. 
For example, suppose you are taking a photo in a dimly lit room, and you want to avoid using a flash to preserve the natural ambiance of the scene. To achieve a properly exposed image, you could increase the ISO setting on your camera. Let’s say you started with ISO 100 and found that your shutter speed was too slow to avoid camera shake or motion blur in the image. You could then increase the ISO to ISO 400, which would make the sensor four times more sensitive to light. This would allow you to use a faster shutter speed to freeze the action and get a sharp image. 
However, increasing the ISO also increases the amount of digital noise or grain in the image. So, you need to find the right balance between a high enough ISO to get a properly exposed image and a low enough ISO to avoid excessive noise. 
In summary, ISO in a DSLR camera allows you to adjust the sensitivity of the camera’s sensor to light and is a crucial setting to consider when shooting in different lighting conditions.