EO Edmund Lens 87994 50mm Dia x 50mm FL Uncoated, Ge Aspheric Lens *NEW* in box!

Description

Diameter (mm):
50.00 +0.0/-0.1
Effective Focal Length EFL (mm):
50.00 @ 4000nm
Numerical Aperture NA:
0.50
Back Focal Length BFL (mm):
45.92
Center Thickness CT (mm):
5.10 ±0.10
Coating:
Uncoated
Substrate:
Germanium (Ge)
Clear Aperture CA (mm):
45
Asphere Figure Error (μm RMS):
0.1
Surface Quality:
60-40
Edge Thickness ET (mm):
2.52
Centering (arcmin):
≤5
Bevel:
Protective bevel as needed
f/#:
1.00
Edges:
Diamond Turned
Radius R2 (mm):
62.38
Shape of Back Surface:
Concave
Wavelength Range (nm):
2000 - 14000
Conjugate Distance:
Infinite
Pictures of lens show reflection of things in room where picture was taken. No blemishes on lens.
Shipped with USPS First Class.