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E-30-976 76.6mm Dia x 849.9mm FL Achromatic Lens

Fosco Connect Part No.: E-30976

  • $ 805.00 or



E-30976 76.6mm Dia x 849.9mm FL Achromatic Lens

Product MGF2 Coating Curve

Product Drawing

Diameter (mm): 76.56 +0.00/-0.08
Effective Focal Length EFL (mm): 849.96
Focal Length Tolerance (%): ±1
Back Focal Length BFL (mm): 838.69
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 73.25
Centering (arcmin): 5.00
Center Thickness CT 1 (mm): 13.08
Center Thickness CT 2 (mm): 10.16
Center Thickness Tolerance (mm): ±0.86
Radius R1 (mm): 497.21
Radius R2 (mm): -345.82
Radius R3 (mm): -344.20
Radius R4 (mm): -1227.86
Edge Thickness ET (mm): 21.27
Substrate: 
N-BK7 / N-SF2
Surface Quality: 60-40
f/#: 11.1
Numerical Aperture NA: 0.05
Coating: MgF2 (400-700nm)
Coating Specification: Ravg ≤1.75% @ 400 - 700nm
Construction: Unmounted, Airspaced 0.10mm
Bevel: Protective bevel as needed
Type: Achromatic Lens
Wavelength Range (nm): 400 - 700

Product Family Description

  • Offered in Cemented or Air-Spaced Designs
  • Mounted Versions Available for Easy Integration
  • Feature MgF2 Anti-Reflection Coating

TECHSPEC® Large Precision Achromatic Lenses offer near-diffraction limited performance across the designated wavelength range. These color-corrected achromatic lenses feature long focal lengths and are available in either cemented or air-spaced designs. Mounted versions feature a male mounting thread for easy integration into optical systems. Adhesive foil spacers and mounting instructions are included for unmounted, air-spaced achromatic lenses.

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