The Stonefield puzzle is extremely easy. Located at 4575, 4976, it overlooks the bridge between Stonefield and Scarlet Gorge. You will find telescopes at the overlook. From left to right, they are numbered 1-5 (NOTE: there are no actual numbers on the telescopes. This is to help you hit them in the correct order). You will also see a lever looking thing located in the center of the half moon the telescopes make.
When doing this puzzle the order you must hit the telescopes is 5,2,1,4,3 (remember from left to right they are 1-5). Once you have activated all of the telescopes you must quickly run to the lever and right click it. This will complete the puzzle if you have done it fast enough. A chest will appear and you can claim your reward.