Cemented DoubletsClick part # for details or to add to shopping cart.
Specifications
EFL (mm): 21
Major Dia: 12
ET: 6.4
Glass Type Code: C
R1: 14.3
V1H1: 0.8
CT Lens 1: 6.4
V2H2: -4.4
R2: -9.47
FF: 20.3
CT Lens 2: 1.7
A: 21.6
R3: -52.02
BF: 16.7
D: 16.9
The classic structure of a doublet combines a positively powered crown element with a negatively powered flint element. They deliver high performance when the application involves small fields of view, typically up to 6 degrees. Their image quality surpasses that of singlets.