Name: 76.6mm Dia x 849.9mm FL Achromatic Lens
Brand: TECHSPEC
SKU: 30-976
Price: £420.75

76.6mm Dia x 849.9mm FL Achromatic Lens

Stock #30-976 3-4 days

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£420.75

Qty 1-5
£420.75

Qty 6+
£357.64

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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

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

N-BK7 / N-SF2

Surface Quality:

60-40

f/#:

11.1

Numerical Aperture NA:

0.05

Coating:

MgF₂ (400-700nm)

Coating Specification:

R_avg ≤1.75% @ 400 - 700nm

Construction:

Unmounted, Airspaced 0.10mm

Bevel:

Protective bevel as needed

Type:

Achromatic Lens

Wavelength Range (nm):

400 - 700

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

View

Reach 240:

Compliant

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. The lenses have a MgF2 anti-reflection coating and are available in diameters up to 140mm. TECHSPEC® Large Precision Achromatic Lenses, in the mounted version, 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.