Binocular tubes
l It holds the eyepiece
l Binoculars come with different focal lengths 80,125,160,170mm etc
l They have straight,inclined and inclinable tubes
l Straight tube binoculars are suggested for endodontists because it permits direct vision in both the arches
Eye piece
l These fit into the binocular tubes, modern versions screw into the binocular tubes
l They come in varying magnification,6.3x,8,10,12,16,20
l Eyepieces have adjustable diopter settings of+or-8 diopter
Diopter settings are used for
i) To adjust for accommodation which is the ability to focus the lens of the eyes
ii) To adjust the refractive error
Tomorrow we will see about
l Objective lens
l Illuminating systems
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