Cemented DoubletsClick part # for details or to add to shopping cart.
Specifications
EFL (mm): 20.5
Major Dia: 8.5
ET: 3.3
Glass Type Code: D
R1: 11.97
V1H1: 0.4
CT Lens 1: 3.2
V2H2: -2.3
R2: -8.5
FF: 20.3
CT Lens 2: 1.1
A: 21
R3: -33.6
BF: 18.4
D: 18.7
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.