Cemented DoubletsClick part # for details or to add to shopping cart.
Specifications
EFL (mm): 19.9
Major Dia: 11.5
ET: 3.1
Glass Type Code: K
R1: 12.64
V1H1: 0.6
CT Lens 1: 4
V2H2: -2.7
R2: -9.2
FF: 19.3
CT Lens 2: 1
A: 20.7
R3: -33.91
BF: 17.3
D: 17.8
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.