The lens as shown in the diagram had a focal length of 100mm and an aperture of approximately f/100 (the actual aperture was measured using a magnifying glass and a ruler.
(The lens as shown in the diagram; had; a focal length of 100mm and an aperture of approximately f/100) (the actual aperture; was measured; using a magnifying glass and a ruler)
The lens as shown in the diagram the actual aperture
had was measured
a focal length of 100mm and an aperture of approximately f/100
using a magnifying glass and a ruler