Apple QuickTake 150 (for Windows) - Manual (Page 21)

Judging the distance from your subject with the closeup lens
You can use the range finder triangles that are superimposed on the closeup
lens to estimate your distance from the object you want to photograph.
1 Find some object or part of the object you are photographing to use as a guide. The
object must be approximately 3 3/8 inches (9 cm) long or wide, about the width of a
credit card.
You can also use the distance between two objects as a guide.
2 While looking through the viewfinder, move forward and backward until your guide just
fills the space between the triangles.
When the space between the triangles is just filled with the object you’ve
selected as your guide, you are 1 foot (30 cm) away from the object and the
image will be properly focused.
1 foot (30 cm)
Your guide should fill the space
between the two triangles in the viewfinder.
13 Using the Camera to Capture Images