Why is Galaxy S5's front camera's photo quality lower?

Please note: The front camera of Galaxy S5 uses a 90 degree wide-angle lens. This is very useful and convenient because it’s suitable for taking wide-angle photos when using the Camera close to the Subject (e.g. when taking a picture of yourself). 

However, when compared to a camera with a normal lens, the distance between lens and sensor is shorter. As a result, the absorption of light is subsequently lower for the front camera module using a wide angle lens than a normal lens, and photos taken in low-light conditions may be lower in quality than normal-light conditions. 

Also, minor image distortion may occur in wide-angle photos especially at the periphery of the image due to the properties of the lens used to take a wider screen image. It does not affect device performance problems. 

For better quality of photos in low-light conditions, please use the main camera located on the back or rear of the handset. 

Please also make sure the lens area is clean (use a soft dry cloth to wipe clean if the lens area is dirty). Otherwise, the device may not work properly in some modes that require high resolutions.