E-13-521 8mm Dia x 12.5mm EFL Hastings Triplet Achromatic Lens
E-13521 8mm Dia x 12.5mm EFL Hastings Triplet Achromatic Lens
Diameter (mm): 8.00 +0.0/-0.025
Effective Focal Length EFL (mm): 12.50
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 9.82
Focal Length Specification Wavelength (nm): 587.6
Centering (arcmin): <3
Center Thickness CT (mm): 7.23
Center Thickness A (mm): 5.23
Center Thickness B (mm): 1.00
Center Thickness Tolerance (mm): ±0.3
Radius R1 (mm): 9.40
Radius R2 (mm): 4.805
Radius R3 (mm): -4.805
Radius R4 (mm): -9.395
Surface Quality: 40-20
f/#: 1.56
Numerical Aperture NA: 0.32
Coating: MgF2 (400-700nm)
Coating Specification: Ravg ≤1.75% @ 400 - 700nm
Power (P-V) @ 632.8nm: 1.5λ
Irregularity (P-V) @ 632.8nm: λ/4
Bevel: Protective bevel as needed
Type: Achromatic Triplet Lens
Wavelength Range (nm): 400 - 700
Product Family Description
- Unique, 3-Element Design
- MgF2 Coated
- Steinheil Triplet Achromatic Lenses also Available
TECHSPEC® Hastings Triplet Achromatic Lenses feature a unique, three-element design that provides for distortion free, color-correct viewing. These lenses are computer designed to interact with each other, contributing to the reduction or elimination of “pincushion” distortion and chromatic and spherical aberrations. TECHSPEC® Hastings Triplet Achromatic Lenses are composed of two concave meniscus elements cemented to a double-convex lens.