Name: 12.5mm Dia x -50mm FL VIS 0° Coated, Negative Achromatic Lens
Brand: TECHSPEC
SKU: 62-488
Price: $88.00

12.5mm Dia x -50mm FL VIS 0° Coated, Negative Achromatic Lens

Diameter (mm):

12.50 +0.0/-0.025

Effective Focal Length EFL (mm):

-50.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

-51.58

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

11.50

Centering (arcmin):

Center Thickness CT 1 (mm):

2.00

Center Thickness CT 2 (mm):

1.56

Center Thickness Tolerance (mm):

±0.2

Radius R₁ (mm):

-30.83

Radius R₂ (mm):

23.47

Radius R₃ (mm):

69.20

Edge Thickness ET (mm):

4.40

N-BK7 / N-SF5

Surface Quality:

40-20

f/#:

4.00

Numerical Aperture NA:

0.13

Coating:

VIS 0° (425-675nm)

Coating Specification:

R_avg ≤0.4% @ 425 - 675nm

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Bevel:

Protective bevel as needed

Type:

Negative Achromatic Lens

Wavelength Range (nm):

425 - 675

Regulatory Compliance

RoHS 2015:

Compliant

Reach 219:

Compliant

Certificate of Conformance:

View

Product Family Description

VIS 0° and VIS-NIR Coatings
6.25 – 25mm Diameter Options
MgF₂ Coated Negative Achromatic Lenses also Available

TECHSPEC® Broadband AR Coated Negative Achromatic Lenses are corrected for color and on-axis aberrations. These lenses, consisting of two optical elements cemented together, are commonly used as Barlow lenses to extend focal lengths. TECHSPEC® Broadband AR Coated Negative Achromatic Lenses are available in various diameter sizes and VIS 0° or VIS-NIR coating options.

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