What is ISO and How does it affect your camera?
ISO controls the amount of light your camera lets in, and therefore how dark or light your photos will be. Here are some top tips to help calculate correct exposure: Low values, such as ISO 100, are best for a sunny outdoor shoot. For shooting at night — or indoors with dim lighting — use an ISO of 1600 or higher.
Higher and Lower ISO
Higher ISO numbers increase sensitivity, making images brighter, but also introduce noise or grain. Lower ISO settings result in darker, cleaner images with less grain.
Higher
High ISO is generally well suited to low-light situations, especially when a fast shutter speed or a narrow lens aperture is essential to achieving a creative goal. For example, using a higher ISO setting for hand-held street photography at night allows one to use fast shutter speeds to create bright, sharp images.
Lower
When you are taking pictures in good lighting conditions, you should use low ISO to avoid noise in the image. This will give you the best quality picture. That’s because a high ISO can lead to noise in your photos, which can be especially visible in dark or low-light situations.
My photos using High ISO
I used a high ISO for this photo you can clearly see this as in the photo below I zoomed in and the photo is grainy