Cemented DoubletsClick part # for details or to add to shopping cart.
Specifications
EFL (mm): 20.5
Major Dia: 18
ET: 12.5
Glass Type Code: WW
R1: 26.67
V1H1: 2.5
CT Lens 1: 10
V2H2: -7
R2: -9.5
FF: 37.2
CT Lens 2: 5
A: 38.8
R3: -45.42
BF: 32.7
D: 33.6
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.