You cant really  view the F-stop on the top but it's the ligh. The small hole where you look to view the things you going to take a picture of and their is an adjust button, zoom in and out button , also the shutter button.Their's also a focal lenght button. Something i like about this camra is that the pictures come out clearley and sharp but i dislike that it's kind of a big and heavy camera but other than that it's a real good camera.