Lenses (E+30)

  E+30+5 Air, glass and water lenses in water tank with arc lamp.
  E+30+10 Blackboard optics: Light sources with lucite lenses.
  E+30+15 Real images: Lighted arrow image and various lenses.
  E+30+17 Real images: Lighted ‘F-object’ and an astygmatic lens.
  E+30+18 Real images: Lighted ‘F-object’ and a cylindrical lens.
  E+30+20 Cylindrical lens of lucite with words "DIOXIDE GLASS".
  E+30+25 Fresnel lenses to show.
  E+30+30 Large lens shows chromatic aberration on screen using arc lamp.
  E+30+35 Pincushion and barrel distortion of lenses using arc lamp.
  E+30+40 Cylindrical aberration: Wooden model.
  E+30+45 Astronomical telescope: Using objective and eyepiece lenses.
  E+30+50 Galilean telescope: similar to E+30+45.
  E+30+55 Compound microscope is assembled from lenses.
  E+30+60 Lantern slide projector with removable housing.
  E+30+65 Model of the eye, with near/far sight lenses, using arc lamp.