Another device that artists use when they are drawing is sighting. This is a tool and a process that compares the relationships of angles, point, shapes and spaces. Betty Edwards states that, “Sighting is visual perspective, with the optical information perceived directly by the eye and drawn by the artist without revision. Sighting requires no T-squares, triangles, protractors, rulers. All you need is pencil and paper. The only other requirement is a quiet L-mode that will stay out of the act and not protest when you draw thing according to the way they really look and not according to what we know about them. Other artists prefer to use tools like a viewfinder to sticks that can be used a reference points to see the different angles. The procedure is to use a pencil or stick and hold it out in front of you at arm’s length and close one eye while looking at the object. Using the pencil, find the mid-point and find different reference points to visually measure the size of the object in relationship to the objects and space around it. Click on the link below to see the two examples and scroll to page 71 and 72.
http://books.google.com/books?id=E9AnudWoHRkC&pg=PA71&lpg=PA71&dq=sighting+in+drawing&source=bl&ots=PNtP7cVKYS&sig=ir2fzUFDvCVXiXS3YZjOqFhuzUk&hl=en&ei=XKNGSv-CH4HaNrKvqJcB&sa=X&oi=book_result&ct=result&resnum=1
