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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

21mm EFL Unmounted, RKE Precision Eyepiece

TECHSPEC® RKE® Precision Eyepieces

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Stock #66-210 In Stock
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C$155.40
Qty 1-24
C$155.40
Qty 25+
C$112.70
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Distortion (%):
5 (Specified @ 0.7 Field)
Effective Focal Length EFL (mm):
21.00
Eye Relief (mm):
18.80
Field Stop Diameter (mm):
17.3
Apparent Field (°):
45.00
Back Focal Length BFL (mm):
11.73
Center Air Spacing (mm):
1.000
Lateral Color, 0.7 Field :
0.014
Total Length, Glass Only (mm):
16.69
Type:
Unmounted
Spot Size (μm):
6/8 (On-Axis/0.7 Field)
Housing Length (mm):
N/A
Image Distance (mm):
11.638
Manufacturer:
Edmund Optics®

Regulatory Compliance

RoHS:
Certificate of Conformance:

Product Family Description

  • Full Prescription Data Available
  • Long Eye Relief
  • Apparent Field of 45°

The RKE® line of eyepieces is one of our most popular designs. Originally produced for telescope use, over time they have proven useful in a wide variety of industrial and medical applications. In addition, to help customers take advantage of the powerful current optical design software, we are pleased to forward full prescription data for these eyepieces.

Prescription information available upon request. Please complete a Request for Prescription Form.

Unmounted RKE Eyepieces include the eye Lens, field Lens, and black anodized spacer between the 2 lenses. Unmounted configurations are designed to provide OEMs with the components required to integrate these eyepieces into customer-designed applications.