If you are the owner of an NX100 digital camera, then there is an electronic viewfinder available specifically for your camera that will come into it's own when certain situations arise. Here are some situations where an electronic viewfinder will come in helpful:
In bright light
When it's really bright, or the sun is shining straight on to the back of your camera, it can be really difficult to see anything on the screen, even if you up the brightness level. This is where the electronic viewfinder comes in, as you'll be able to see the scene perfectly clearly when you look through it, eliminating any glare getting in the way of composing your shot.
Help frame the image
Sometimes, looking at the scene away from the camera slightly on the screen can result in a composure that's not so tidy. By using an electronic viewfinder, you'll have coverage of approximately 98% when using the viewfinder with an NX100, helping you to make sure that everything you want is in the shot, and nothing you don't want creeps in. Sometimes, looking through the viewfinder and moving your camera around will allow you to discover new viewpoints that you wouldn't have thought of capturing before.
Help to stabilise your camera
Using the viewfinder can sometimes help you to stabilise the camera a bit more if using a tripod isn't an option. Holding the camera up to your eye while still holding the camera with two hands gives you three points of contact, helping to keep your image shake free. Plus, as mentioned earlier, this will help you to clearly compose your images too without getting distracted by what's around you.
For more information on the electronic viewfinder EVF10, take a look at the Samsung website.