Cemented DoubletsClick part # for details or to add to shopping cart.
Specifications
EFL (mm): 20
Major Dia: 12.5
ET: 4.6
Glass Type Code: ZZ
R1: 13.97
V1H1: 0.3
CT Lens 1: 5.3
V2H2: -3.5
R2: -9.33
FF: 19.7
CT Lens 2: 1.1
A: 21.2
R3: -76.14
BF: 16.5
D: 16.7
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.