Eyepieces
The Crouch microscope comes with two sets of Huygenian eyepieces. Both consist of two plano-convex lens elements separated by a distance less than their respective focal lengths. The dimensions are as follows:
Long
Short
Top lens
Bottom lens
Length
1.8
3.0
1.2
2.3
2.7
5.0
2.7
3.5
6.5cm
4.3cm
Diameter
Focal length
Diameter
Focal length
There are two sets of eyepieces with this microscope. The short corresponds to approximately 7x. The long set is about 15x magnification.