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N-BK7 Bi-Convex Lenses, Uncoated


  • Positive Focal Length for Use at Finite Conjugates
  • Uncoated Wavelength Range: 350 - 2000 nm
  • Zemax Files Available

LB1157

(Ø6 mm)

LB1494

(Ø9 mm)

LB1092

(Ø1/2")

LB1761

(Ø1")

LB1723

(Ø2")

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N-BK7 Bi-Convex Spherical Singlets
Lens Shape Convex/Convex
Material N-BK7 (Grade A)a
Wavelength Rangeb 350 nm - 2.0 μm (Uncoated)
Design Wavelength 587.6 nm 
Index of Refraction 1.515 (@ 633 nm)
Surface Quality 40-20 Scratch-Dig
Surface Irregularity λ/4
Spherical Surface Power 3λ/2
Abbe Number vd=64.17
Centration ≤3 arcmin
Clear Aperture >90% of Diameter
Diameter Tolerance +0.0 mm / -0.1 mm
Focal Length Tolerance ±1%
a. Click Link for Detailed Specifications on the Substrate

b. Also available with a -A coating for the 350 - 700 nm range, a 

 -B coating for the 650 - 1050 nm range, or a -C coating for the 1050 - 1700 nm range.

Bi-Convex Lens Selection Guide
N-BK7
Mounted N-BK7
UV Fused Silica
CaF2
ZnSe -F (8 - 12 µm)

Custom Coatings are also available. Please contact our Tech Support for a quote.

Features

  • Material: N-BK7
  • Wavelength Range: 350 - 2000 nm (Uncoated)
  • Available Sizes: Ø6.0 mm, Ø9.0 mm, Ø1/2", Ø1", and Ø2"
  • Focal Lengths Available from 10.0 mm to 1.0 m
  • Well Suited for Many Finite Imaging Applications
  • Offers Excellent Transmittance Throughout the Visible and Near Infrared

Thorlabs' uncoated N-BK7 Bi-Convex Lenses are popular for many finite imaging applications. This type of lens is best suited for use in situations where the object and image are on opposite sides of the lens and the ratio of the image and object distances (conjugate ratio) is between 0.2 and 5. These lenses are designed to have a focal length of f= (R1*R2)/((n-1)*(R2-R1)).

N-BK7 is probably the most common optical glass used for high-quality optical components. It is typically chosen whenever the additional benefits of UV fused silica (i.e., good transmission further into the UV and a lower coefficient of thermal expansion) are not necessary.

Although this page features our uncoated bi-convex lenses, these lenses are also available with one of three antireflection coatings (-A, -B, or -C) deposited on both sides to reduce the amount of light reflected from each surface. Links to each of these pages can be found in the table to the right. Please see the Graphs tab for coating details.

Lens kits are available. Please click here for information.

Zemax Files
Click on the red Document icon next to the item numbers below to access the Zemax file download. Our entire Zemax Catalog is also available.
Optic Cleaning Tutorial
Optical Coatings and Substrates
Quick Links to Other Spherical Singlets
Plano-Convex Bi-Convex Best Form Plano-Concave Bi-Concave Positive Meniscus Negative Meniscus

Below is the transmission curve for N-BK7, a RoHS-compliant form of BK7. Total Transmission is shown for a 10 mm thick, uncoated sample and includes surface reflections. Each N-BK7 bi-convex lenses can be ordered uncoated (available below) or with one of the following broadband AR coatings: 350 - 700 nm (designated with -A), 650 - 1050 nm (designated as -B), or 1050 - 1700 nm (designated as -C).

Our high-performance multilayer AR coatings have an average reflectance of less than 0.5% (per surface) across the specified wavelength ranges and provide good performance for angles of incidence (AOI) between 0° and 30° (0.5 NA). For optics intended to be used at large incident angles, consider using a custom coating optimized at a 45° angle of incidence; this custom coating is effective from 25° to 52°. The plot shown below indicates the performance of the standard coatings in this family as a function of wavelength. Broadband coatings have a typical absorption of 0.25%, which is not shown in the reflectivity plots.

N-BK7 Transmittance
Click to Enlarge
Click Here for Raw Data

N-BK7 AR Coating Curve

Key Quality Control Equipment
  • TriOptics OptiSpheric
  • Zygo GPI-XP/D Interferometer
  • PerkinElmer Lambda 1050 Spectrophotometer
  • Agilent Cary 5000 Spectrophotometer
Click to Enlarge
A Thorlabs technician measuring the irregularity of one of our singlets using a Zygo GPI-XP/D Interferometer.

Introduction
Thorlabs has a series of quality control procedures in order to ensure our singlets meet our standards and specifications. This starts with in-process inspections of the lens’ imaging capabilities and ends with a final inspection of surface quality and dimensions. Specifications for particular products can be found in their linked documentation by clicking the  symbol. This tab will take you through the general process used to check for quality.

Singlet Quality Practices
In-process inspection begins once the singlet has been shaped to specifications. Focal length, surface irregularity, and surface power are checked, following sampling plan Level VI given in MIL-PRF-13830B (see below). These three specifications are imperative for proper imaging. Surface irregularity of parts is kept to below either a quarter wavelength or a half wavelength at 633 nm, depending on the material of the singlet. Below is a graph of over 200 batches of singlets with irregularity data of both their front and back sides.

At this point, some uncoated singlets will proceed to final inspection, while others will receive an antireflective (AR) coating. The application of optical coatings has its own in-process inspections. To ensure the AR coating is applied properly, we verify both reflectance and transmission performance by scanning witness pieces using spectrophotometry; the material of these 2 mm thick witness samples matches the other parts in the run. For reflectance verification, we use at least one witness sample for each coating run. Transmitting optics receive two AR coatings, one on each surface, so for the verification of transmission, we use one witness sample that is also coated on both of its sides. Large runs use multiple witness samples to ensure the uniformity across the deposition chamber. By testing coating performance during every run, variance over time is kept low. To see how coatings vary, see the table below.

Final inspection of both uncoated and AR-coated singlets includes a batch check of diameter and thickness and a 100% visual check to ensure that the surface quality, chamfer, and clear aperture meet our published specifications. While surface quality is cosmetic to a degree, scratches, digs, and other inclusions in the surface of a part can increase the chances of damage to the singlet when used with high-power sources. These inspections are done in a clean, dark room under lighting that meets the requirements of MIL-PRF-13830B. Inspection under a single light source in a dark room allows for inconsistencies in the glass to be located without being obscured by glare or reflections.

MIL-PRF-13830B: Performance Specifications for Optical Components
MIL-PRF-13830B is a document created by the U.S. Army Armament Research, Development and Engineering Center's Defense Quality and Standardization Office for the specifications covering how finished optical components should be manufactured, assembled, and inspected. While primarily for use in letting the military dictate how products they use can be incorporated into their equipment, these standards have been adopted by many optics manufacturers. To download a copy of the full document, click here.

-A Coating
350 nm to 700 nm
-B Coating
650 nm to 1050 nm
-C Coating
1050 nm to 1700 nm
Singlet
Irregularity
Coating Variance:
Transmission

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge
Coating Variance:
Reflectance

Click to Enlarge

Click to Enlarge

Click to Enlarge

Disclaimer: The coated transmission data presented here are of 2 mm thick witness samples of N-BK7 or equivalent glass, and all the data here are typical. Some variations in performance data will occur from lot to lot. Please contact Technical Support with any questions regarding the use or reliability of these data.

BK7 Index of Refraction
Click on the image to download the raw data. In the thick lens equation, use the index of refraction for N-BK7 at the wavelength of interest to approximate the wavelength-dependent focal length of any of the plano-convex lenses.

The focal length of a thick spherical lens can be calculated using the thick lens equation below. In this expression, nl  is the index of refraction of the lens, R1 and R2 are the radii of curvature for surfaces 1 and 2, respectively, and d is the center thickness of the lens.

thick lens equation

For bi-convex lenses, where the front and back radii of curvature are equal in magnitude and opposite in sign, R1 = -R2 = R, we have

Lens Equation Final Biconvex

The focal length of the lens calculated using the simplified thick lens equation directly above is the distance between the second (back) principle plane (H") and the position at which a collimated beam incident on the curved surface of the bi-convex is focused. The same analysis can be performed using a point source and the first (front) principle plane (H'). The principle plane positions of a thick lens can be calculated with the following equations:

principal plane equation one and Principal plane equation two

Again, for the same bi-convex lens, R1 = -R2 = R, we can solve for H' and H' :

Principle Plane Final

CXY1 in 30 mm Cage System
Click to Enlarge

CXY1 Translation Mount and
SM1 Lens Tube Mounted in a
30 mm Cage System
Threaded Mounting Adapter
Click to Enlarge

Ø1" Optic Mounted in a
ST1XY-S XY Translator

Click to Enlarge

LMR1 Fixed Mount with Ø1" Lens

Click to Enlarge

LM2XY Translating Mount with Ø2" Lens
Recommended Mounting Options for Thorlabs Lenses
Item # Mounts for Ø5 mm to Ø10 mm Optics
Imperial Metric
(Various) Fixed Lens Mounts for Small Optics, Ø5 mm to Ø10 mm
(Various) Small Optic Adapters for Use with Standard Fixed Lens Mounts, Ø5 mm to Ø10 mm
Item # Mounts for Ø1/2" (Ø12.7 mm) Optics
Imperial Metric
LMR05 LMR05/M Fixed Lens Mount for Ø1/2" Optics
LM05XY LM05XY/M Translating Lens Mount for Ø1/2" Optics
SCP05 16 mm Cage System, XY Translation Mount for Ø1/2" Optics
(Various) Ø1/2" Lens Tubes,
Optional SM05RRC Retaining Ring for High-Curvature Lenses (See Below)
Item # Mounts for Ø1" (Ø25.4 mm) Optics
Imperial Metric
LMR1 LMR1/M Fixed Lens Mount for Ø1" Optics
LM1XY LM1XY/M Translating Lens Mount for Ø1" Optics
ST1XY-S ST1XY-S/M Translating Lens Mount with Micrometer Drives (Other Drives Available)
CXY1 30 mm Cage System, XY Translation Mount for Ø1" Optics
(Various) Ø1" Lens Tubes,
Optional SM1RRC Retaining Ring for High-Curvature Lenses (See Below)
Item # Mounts for Ø2" (Ø50.8 mm) Optics
Imperial Metric
LMR2 LMR2/M Fixed Lens Mount for Ø2" Optics
LM2XY LM2XY/M Translating Lens Mount for Ø2" Optics
CXY2 60 mm Cage System, XY Translation Mount for Ø2" Optics
(Various) Ø2" Lens Tubes,
Optional SM2RRC Retaining Ring for High-Curvature Lenses (See Below)
Item # Adjustable Optic Mounts
Imperial Metric
LH1 LH1/M Adjustable Mount for Ø0.28" (Ø7.1 mm) to Ø1.80" (Ø45.7 mm) Optics
LH2 LH2/M Adjustable Mount for Ø0.77" (Ø19.6 mm) to Ø2.28" (Ø57.9 mm) Optics
VG100 VG100/M Adjustable Clamp for Ø0.5" (Ø13 mm) to Ø3.5" (Ø89 mm) Optics
SCL03 SCL03/M Self-Centering Mount for Ø0.15" (Ø3.8 mm) to Ø1.77" (Ø45.0 mm) Optics
SCL04 SCL04/M Self-Centering Mount for Ø0.15" (Ø3.8 mm) to Ø3.00" (Ø76.2 mm) Optics
LH160C LH160C/M Adjustable Mount for 60 mm Cage Systems,
Ø0.50" (Ø13 mm) to Ø2.00" (Ø50.8 mm) Optics
SCL60C SCL60C/M Self-Centering Mount for 60 mm Cage Systems,
Ø0.15" (Ø3.8 mm) to Ø1.77" (Ø45.0 mm) Optics

 

Mounting High-Curvature Optics

Thorlabs' retaining rings are used to secure unmounted optics within lens tubes or optic mounts. These rings are secured in position using a compatible spanner wrench. For flat or low-curvature optics, standard retaining rings manufactured from anodized aluminum are available from Ø5 mm to Ø4". For high-curvature optics, extra-thick retaining rings are available in Ø1/2", Ø1", and Ø2" sizes.

Extra-thick retaining rings offer several features that aid in mounting high-curvature optics such as aspheric lenses, short-focal-length plano-convex lenses, and condenser lenses. As shown in the animation to the right, the guide flange of the spanner wrench will collide with the surface of high-curvature lenses when using a standard retaining ring, potentially scratching the optic. This contact also creates a gap between the spanner wrench and retaining ring, preventing the ring from tightening correctly. Extra-thick retaining rings provide the necessary clearance for the spanner wrench to secure the lens without coming into contact with the optic surface.


Posted Comments:
panhujie  (posted 2014-04-22 09:34:22.657)
I need to know the typical energy density limit for "N-BK7 Bi-Convex Lenses, Uncoated",whose code is LB1761, but I cannot find it out. And I find that many of your optical products ignore the data(typical energy density limit) or it may be not obvious. Would you please send me an email and offer me the data since it's very important. Thanks.
jlow  (posted 2014-04-23 03:38:13.0)
Response from Jeremy at Thorlabs: The LB1761 is uncoated so it can take a fairly high amount of energy. The surface damage threshold for N-BK7 substrate should be at least 30J/cm^2 (532nm, 10ns). Please note that this is assuming the lens is clean. If there are any contaminants on the surface of the lens, it can be damaged even with low power.

Ø6.0 mm N-BK7 Bi-Convex Lenses (Uncoated)

Item # Diameter Focal Length Dioptera Radius of Curvature Center Thickness Edge Thickness Back Focal Length Reference
Drawing
LB1157 6.0 mm 10.0 mm +100.0 9.9 mm 2.4 mm 1.5 mm 9.2 mm Bi-Convex Lens Drawing
LB1406 6.0 mm 12.0 mm +83.3 12.0 mm 2.3 mm 1.5 mm 11.2 mm

Suggested Fixed Lens Mount: LMR6(/M)

  • Reciprocal of the Focal Length in Meters
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
LB1157 Support Documentation
LB1157N-BK7 Bi-Convex Lens, Ø6.0 mm, f = 10.0 mm, Uncoated
$22.75
Today
LB1406 Support Documentation
LB1406N-BK7 Bi-Convex Lens, Ø6.0 mm, f = 12.0 mm, Uncoated
$21.32
Today

Ø9.0 mm N-BK7 Bi-Convex Lenses (Uncoated)

Item # Diameter Focal Length Dioptera Radius of Curvature Center Thickness Edge Thickness Back Focal Length Reference
Drawing
LB1494 9.0 mm 12.0 mm +83.3 11.7 mm 3.6 mm 1.8 mm 10.7 mm Bi-Convex Lens Drawing
LB1212 9.0 mm 20.0 mm +50.0 20.1 mm 2.8 mm 1.8 mm 19.0 mm

Suggested Fixed Lens Mount: LMR9(/M)

  • Reciprocal of the Focal Length in Meters
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
LB1494 Support Documentation
LB1494N-BK7 Bi-Convex Lens, Ø9.0 mm, f = 12.0 mm, Uncoated
$23.56
Today
LB1212 Support Documentation
LB1212N-BK7 Bi-Convex Lens, Ø9.0 mm, f = 20.0 mm, Uncoated
$21.32
Today

Ø1/2" (12.7 mm) N-BK7 Bi-Convex Lenses (Uncoated)

Item # Diameter Focal Length Dioptera Radius of Curvature Center Thickness Edge Thickness Back Focal Length Reference
Drawing
LB1092 1/2" 15.0 mm +66.6 14.6 mm 4.7 mm 1.8 mm 13.4 mm Bi-Convex Lens Drawing
LB1450 1/2" 20.0 mm +50.0 19.9 mm 3.9 mm 1.8 mm 18.7 mm
LB1014 1/2" 25.0 mm +40.0 25.2 mm 3.4 mm 1.8 mm 23.8 mm
LB1258 1/2" 30.0 mm +33.3 30.4 mm 3.1 mm 1.8 mm 28.9 mm
LB1378 1/2" 40.0 mm +25.0 40.7 mm 2.8 mm 1.8 mm 39.1 mm
LB1844 1/2" 50.0 mm +20.0 51.1 mm 2.6 mm 1.8 mm 49.1 mm
LB1187 1/2" 100.0 mm +10.0 102.6 mm 2.2 mm 1.8 mm 99.3 mm

Suggested Fixed Lens Mount: LMR05(/M)

  • Reciprocal of the Focal Length in Meters
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
LB1092 Support Documentation
LB1092N-BK7 Bi-Convex Lens, Ø1/2", f = 15.0 mm, Uncoated
$24.68
Today
LB1450 Support Documentation
LB1450N-BK7 Bi-Convex Lens, Ø1/2", f = 20.0 mm, Uncoated
$24.38
Today
LB1014 Support Documentation
LB1014N-BK7 Bi-Convex Lens, Ø1/2", f = 25.0 mm, Uncoated
$22.64
Today
LB1258 Support Documentation
LB1258N-BK7 Bi-Convex Lens, Ø1/2", f = 30.0 mm, Uncoated
$22.34
Today
LB1378 Support Documentation
LB1378N-BK7 Bi-Convex Lens, Ø1/2", f = 40.0 mm, Uncoated
$21.93
Today
LB1844 Support Documentation
LB1844N-BK7 Bi-Convex Lens, Ø1/2", f = 50.0 mm, Uncoated
$21.83
Today
LB1187 Support Documentation
LB1187N-BK7 Bi-Convex Lens, Ø1/2", f = 100.0 mm, Uncoated
$21.83
Today

Ø1" (25.4 mm) N-BK7 Bi-Convex Lenses (Uncoated)

Item # Diameter Focal Length Dioptera Radius of Curvature Center Thickness Edge Thickness Back Focal Length Reference
Drawing
LB1761 1" 25.4 mm +39.4 24.5 mm 9.0 mm 1.9 mm 22.2 mm Bi-Convex Lens Drawing
LB1757 1" 30.0 mm +33.3 29.5 mm 7.7 mm 2.0 mm 27.3 mm
LB1811 1" 35.0 mm +28.6 34.9 mm 6.8 mm 2.0 mm 32.7 mm
LB1027 1" 40.0 mm +25.0 40.1 mm 6.1 mm 2.0 mm 37.9 mm
LB1471 1" 50.0 mm +20.0 50.6 mm 5.2 mm 2.0 mm 48.2 mm
LB1596 1" 60.0 mm +16.7 61.0 mm 4.7 mm 2.0 mm 58.4 mm
LB1901 1" 75.0 mm +13.3 76.6 mm 4.1 mm 2.0 mm 73.6 mm
LB1676 1" 100.0 mm +10.0 102.4 mm 3.6 mm 2.0 mm 98.8 mm
LB1904 1" 125.0 mm +8.0 128.2 mm 3.3 mm 2.0 mm 123.9 mm
LB1437 1" 150.0 mm +6.7 154.0 mm 3.1 mm 2.0 mm 149.0 mm
LB1294 1" 175.0 mm +5.7 179.8 mm 2.9 mm 2.0 mm 174.0 mm
LB1945 1" 200.0 mm +5.0 205.6 mm 2.8 mm 2.0 mm 199.1 mm
LB1056 1" 250.0 mm +4.0 257.1 mm 2.6 mm 2.0 mm 249.1 mm
LB1779 1" 300.0 mm +3.3 308.6 mm 2.5 mm 2.0 mm 299.2 mm
LB1391 1" 400.0 mm +2.5 411.7 mm 2.4 mm 2.0 mm 399.2 mm
LB1869 1" 500.0 mm +2.0 514.7 mm 2.3 mm 2.0 mm 499.2 mm
LB1475 1" 750.0 mm +1.3 772.2 mm 2.2 mm 2.0 mm 749.3 mm
LB1409 1" 1000.0 mm +1.0 1029.8 mm 2.2 mm 2.0 mm 999.3 mm

Suggested Fixed Lens Mount: LMR1(/M)

  • Reciprocal of the Focal Length in Meters
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
LB1761 Support Documentation
LB1761N-BK7 Bi-Convex Lens, Ø1", f = 25.4 mm, Uncoated
$25.90
Today
LB1757 Support Documentation
LB1757N-BK7 Bi-Convex Lens, Ø1", f = 30.0 mm, Uncoated
$25.20
Today
LB1811 Support Documentation
LB1811N-BK7 Bi-Convex Lens, Ø1", f = 35.0 mm, Uncoated
$24.50
3-5 Days
LB1027 Support Documentation
LB1027N-BK7 Bi-Convex Lens, Ø1", f = 40.0 mm, Uncoated
$24.20
Today
LB1471 Support Documentation
LB1471N-BK7 Bi-Convex Lens, Ø1", f = 50.0 mm, Uncoated
$23.60
Today
LB1596 Support Documentation
LB1596N-BK7 Bi-Convex Lens, Ø1", f = 60.0 mm, Uncoated
$23.30
Today
LB1901 Support Documentation
LB1901N-BK7 Bi-Convex Lens, Ø1", f = 75.0 mm, Uncoated
$23.10
Today
LB1676 Support Documentation
LB1676N-BK7 Bi-Convex Lens, Ø1", f = 100.0 mm, Uncoated
$22.50
Today
LB1904 Support Documentation
LB1904N-BK7 Bi-Convex Lens, Ø1", f = 125.0 mm, Uncoated
$22.40
Today
LB1437 Support Documentation
LB1437N-BK7 Bi-Convex Lens, Ø1", f = 150.0 mm, Uncoated
$21.80
Today
LB1294 Support Documentation
LB1294N-BK7 Bi-Convex Lens, Ø1", f = 175.0 mm, Uncoated
$21.60
Today
LB1945 Support Documentation
LB1945N-BK7 Bi-Convex Lens, Ø1", f = 200.0 mm, Uncoated
$21.50
Today
LB1056 Support Documentation
LB1056N-BK7 Bi-Convex Lens, Ø1", f = 250.0 mm, Uncoated
$21.30
Today
LB1779 Support Documentation
LB1779N-BK7 Bi-Convex Lens,Ø1", f = 300.0 mm, Uncoated
$21.20
Today
LB1391 Support Documentation
LB1391N-BK7 Bi-Convex Lens, Ø1", f = 400.0 mm, Uncoated
$21.20
Today
LB1869 Support Documentation
LB1869N-BK7 Bi-Convex Lens, Ø1", f = 500.0 mm, Uncoated
$21.20
Today
LB1475 Support Documentation
LB1475N-BK7 Bi-Convex Lens, Ø1", f = 750.0 mm, Uncoated
$21.20
Today
LB1409 Support Documentation
LB1409N-BK7 Bi-Convex Lens, Ø1", f = 1000.0 mm, Uncoated
$20.90
Today

Ø2" (50.8 mm) N-BK7 Bi-Convex Lenses (Uncoated)

Item # Diameter Focal Length Dioptera Radius of Curvature Center Thickness Edge Thickness Back Focal Length Reference
Drawing
LB1723 2" 60.0 mm +16.7 59.3 mm 14.4 mm 3.0 mm 55.0 mm Bi-Convex Lens Drawing
LB1309 2" 75.0 mm +13.3 75.2 mm 11.8 mm 3.0 mm 71.0 mm
LB1630 2" 100.0 mm +10.0 101.4 mm 9.5 mm 3.0 mm 96.8 mm
LB1106 2" 125.0 mm +8.0 127.4 mm 8.1 mm 3.0 mm 122.3 mm
LB1374 2" 150.0 mm +6.7 153.3 mm 7.2 mm 3.0 mm 147.6 mm
LB1607 2" 175.0 mm +5.7 179.1 mm 6.6 mm 3.0 mm 172.8 mm
LB1199 2" 200.0 mm +5.0 205.0 mm 6.2 mm 3.0 mm 198.0 mm
LB1889 2" 250.0 mm +4.0 256.6 mm 5.5 mm 3.0 mm 248.2 mm
LB1917 2" 300.0 mm +3.3 308.2 mm 5.1 mm 3.0 mm 298.3 mm
LB1862 2" 400.0 mm +2.5 411.3 mm 4.6 mm 3.0 mm 398.5 mm
LB1909 2" 500.0 mm +2.0 514.4 mm 4.3 mm 3.0 mm 498.6 mm
LB1247 2" 750.0 mm +1.3 772.0 mm 3.8 mm 3.0 mm 748.7 mm
LB1859 2" 1000.0 mm +1.0 1029.5 mm 3.6 mm 3.0 mm 998.8 mm

Suggested Fixed Lens Mount: LMR2(/M)

  • Reciprocal of the Focal Length in Meters
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
LB1723 Support Documentation
LB1723N-BK7 Bi-Convex Lens, Ø2", f = 60.0 mm, Uncoated
$35.70
Today
LB1309 Support Documentation
LB1309N-BK7 Bi-Convex Lens, Ø2", f = 75.0 mm, Uncoated
$35.45
Today
LB1630 Support Documentation
LB1630N-BK7 Bi-Convex Lens, Ø2", f = 100.0 mm, Uncoated
$34.94
Today
LB1106 Support Documentation
LB1106N-BK7 Bi-Convex Lens, Ø2", f = 125.0 mm, Uncoated
$34.94
Today
LB1374 Support Documentation
LB1374N-BK7 Bi-Convex Lens, Ø2", f = 150.0 mm, Uncoated
$34.43
Today
LB1607 Support Documentation
LB1607N-BK7 Bi-Convex Lens, Ø2", f = 175.0 mm, Uncoated
$34.43
Today
LB1199 Support Documentation
LB1199N-BK7 Bi-Convex Lens, Ø2", f = 200.0 mm, Uncoated
$34.43
Lead Time
LB1889 Support Documentation
LB1889N-BK7 Bi-Convex Lens, Ø2", f = 250.0 mm, Uncoated
$34.43
Today
LB1917 Support Documentation
LB1917N-BK7 Bi-Convex Lens, Ø2", f = 300.0 mm, Uncoated
$34.43
Today
LB1862 Support Documentation
LB1862N-BK7 Bi-Convex Lens, Ø2", f = 400.0 mm, Uncoated
$34.43
Today
LB1909 Support Documentation
LB1909N-BK7 Bi-Convex Lens, Ø2", f = 500.0 mm, Uncoated
$34.43
Today
LB1247 Support Documentation
LB1247N-BK7 Bi-Convex Lens, Ø2", f = 750.0 mm, Uncoated
$34.43
Today
LB1859 Support Documentation
LB1859N-BK7 Bi-Convex Lens, Ø2", f = 1000.0 mm, Uncoated
$34.43
Today
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