Keep the noise down
Reduce ugly artefacts in a more controlled way
In low light conditions, your camera may use a high ISO setting to make it more sensitive to light. This can add specks of colour (chrominance) and brightness (luminance) noise to your shots. Apple’s Photos app has an all-in-one Noise Reduction slider. Photo Studio 7 has individual colour and luminance noise sliders for greater control over removing noise without blurring key objects. You can also reduce the presence of colour fringing (chromatic aberration) on specular highlights (something you can’t do in Photos).