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Resolv4K® Modular Zoom Lens Components


  • Components for Building High-Magnification Zoom Lens Systems
  • Configurations to Support Magnifications from 0.22X to 18X
  • Use with Objectives to Achieve Other Magnifications
  • Compatible with Thorlabs’ CCD, sCMOS, and CMOS Cameras

MVR4K

7X Afocal Zoom Lens

MVR10A

1.0X Rear Adapter

MVR05L

0.5X Lens Attachment

MVRCMC

C-Mount Adapter

MVRLC

Coupler for Lens Attachments

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Features

  • Build High-Magnification Zoom Lens Systems for Machine Vision and Other Imaging Applications
  • 7X Afocal Manual Zoom Lens with 0.4X to 2.8X Magnification Range
  • Working Distances from 32.3 mm - 173 mm
  • Ideal for 2/3", 1", 4/3", or 32 mm (APS) Senor Format Cameras
  • Compatible with Objectives or Lens Attachments (Sold Below)
  • Zoom Lens System Optimized for 445 nm - 655 nm Range
  • 0.61 - 55 mm Field of View (See the Field of View Tab for Details)
  • Use 7X Zoom Lens and Rear Adapter to Build a Zoomable Tube Lens
Zoom Lens Exploded
Click to Enlarge

An example configuration of a Resolv4K zoom lens system.

The Resolv4K®1 Modular Zoom Lens Components allow users to build high-magnification zoom lens systems that are ideal for machine vision and other imaging applications. The core 7X afocal zoom lens must be used with a rear adapter (sold below) and can be used with either a magnifying lens attachment (sold below) or microscope objective. Resolv4K zoom lens configurations can support a wide field of view ranging from 0.61 mm - 55 mm and working distances from 32.3 mm - 173 mm (see the Field of View tab for details). Thorlabs also offers 6X and 12X high-magnification zoom lenses that have built in objective lenses and are designed for machine vision applications that require long working distances.

The modularity of the Resolv4K zoom lens components allows users to design their own configurations to meet a range of imaging needs. The MVR4K is an afocal zoom lens that is infinity-corrected on both the object and image side, and is optically designed to be apochromatic from 430 nm - 670 nm. In addition to machine vision applications, these components can also be used as a zoomable infinity-corrected tube lens for widefield imaging. Users can easily build a zoom microscope using a rear adapter, the core afocal zoom lens, and an infinity-corrected objective, as shown in the image to the lower right. This system is designed to provide near diffraction-limited images over a large field of view with minimal vignetting.

MVR4K Transmission
Click to Enlarge

The Resolv4K system can be used as a zoomable infinity-corrected tube lens. By using any infinity-corrected objective, the appropriate coupler, zoom lens, and rear adapter, users can construct a zoom microscope. 

A complete modular zoom lens system consists of the MVR4K 0.4X - 2.8X afocal zoom lens (7X zoom range), a rear adapter (0.6875X, 1X, 1.375X, or 2X), and an optional magnifying lens attachment that includes fine focus adjustment (0.5X, 1X, or 2X), as well as a camera mounting adapter and a coupler to hold the lens attachment (all sold separately below). Together, these components can be configured to achieve focal lengths ranging from 64 mm - 448 and provide a net magnification of 4.5X - 18X with a 7X magnification adjustment range. The magnification adjuster (zoom) is a recessed rotating collar on the barrel of the core afocal zoom lens. We also offer a variety of adapters that allow users to modify their system. To connect a camera, we have two mounting adapters with either a Nikon male F-mount or external C-mount (1.000"-32) threading for compatibility with our C-Mount sCMOS, CMOS, or CCD cameras. Alternatively, the lens attachment can be replaced by a user-selected objective. To connect an objective instead of a lens attachment, we offer couplers for M25 x 0.75-, RMS-, or M26 x 0.706-threaded objectives. For additional information on building a zoom lens system, please see the Assembly and Adjustments tab.

Magnification Calculation
The net magnification, M, of the system (M = image size / object size) is equal to

,

where fRear Adapter is the rear adapter focal length, fObjective is the objective focal length, and MZoom Lens is the zoom lens magnification, which ranges from 0.4X - 2.8X. When using a lens attachment in the system, the objective focal length is the lens attachment focal length.

If a system is made up of all Resolv4K components, another equation for calculating the net magnification is

,

where MRear Adapter is the rear adapter magnification, MLens Attachment is the lens attachment magnification, and MNet System is the magnification of the entire Resolv4K zoom lens configuration, which ranges from 0.64X - 4.5X. For example, the zoom lens system can be set to a magnification between 0.64X and 4.5X (corresponding to a 7X zoom range). If it is used at its maximum magnification setting of 4.5X, along with a 2X rear adapter and a 2X lens attachment, the maximum system magnification of 4.5 x 2 x 2 = 18 is realized. See the Specs tab for the maximum and minimum magnifications of each lens combination.

  1. Resolv4K is a registered trademark of Navitar Optical Solutions.
System Specifications
Lens Attachmenta Core Afocal
Zoom Lens
Rear Adaptera System Magnification Objective NA Resolving Limitb Depth of Field
Lowc Highc Low Mag. High Mag. Low Mag. High Mag. Low Mag. High Mag.
MVR05L (0.5X)
Working Distance: 173 mm
MVR4K
(0.64X - 4.5X)d
MVR068A (0.6875X) 0.22 1.55 0.016 0.048 20.43 µm 7.06 µm 1.85 mm 0.22 mm
MVR10A (1.0X) 0.32 2.25
MVR137A (1.375X) 0.44 3.09
MVR20A (2.0X) 0.64 4.50
MVR10L (1.0X)
Working Distance: 90 mm
MVR068A (0.6875X) 0.44 3.09 0.033 0.095 10.21 µm 3.53 µm 0.46 mm 0.055 mm
MVR10A (1.0X) 0.64 4.50
MVR137A (1.375X) 0.88 6.19
MVR20A (2.0X) 1.28 9.00
MVR20L (2.0X)
Working Distance: 32.3 mm
MVR068A (0.6875X) 0.88 6.19 0.066 0.190 5.11 µm 1.77 µm 0.116 mm 0.014 mm
MVR10A (1.0X) 1.28 9.00
MVR137A (1.375X) 1.76 12.38
MVR20A (2.0X) 2.56 18.00
  • For more specifications on the lens attachments and rear adapters, please see the tables below.
  • Minimum resolvable feature size is half of the threshold line pair limit [Minimum Feature Size = 1/(3 x NA) µm]
  • The low and high system magnification values are calculated using the lowest (0.64X) and highest settings (4.5X) on the MVR4K zoom lens. Please refer to the Magnification Calculation section on the Overview tab for more details.
  • The 0.64X - 4.5X magnification is assuming a 1X lens attachment and 1X rear adapter. This is the magnification range of an entire Resolv4K system; used on its own the MVR4K zoom lens has a magnification range of 0.4X - 2.8X.
Rear Adapter Specifications
Item #a MVR068A MVR10A MVR137A MVR20A
Magnification 0.6875X 1.0X 1.375X 2.0X
Focal Length 110.0 mm 160.0 mm 220.0 mm 320.0 mm
Sensor Coverage 11 mm
(2/3" Format)
16 mm
(1" Format)
22 mm
(4/3" Format)
32 mm
(APS Format)
Distortion 0.13% 0.16% 0.16% 0.17%
Image NA 0.0748 0.0515 0.0375 0.0258
Typical Transmission 91.7%
(445 - 655 nm)
91.9%
(445 - 655 nm)
95.1%
(445 - 655 nm)
95.2%
(445 - 655 nm)
  • For more specifications, please see the Field of View tab.
Lens Attachment Specifications
Item #a MVR05L MVR10L MVR20L
Focal Length 200.0 mm 100.0 mm 50.0 mm
Working Distance 173 mm 90 mm 32.3 mm
Objective Coverage 50.0 - 7.1 mm
(Low - High Mag)
25.0 - 3.55 mm
(Low - High Mag)
12.5 - 1.78 mm
(Low - High Mag)
Distortion 1.58% to -0.031% 1.77% to -0.044% -0.3% to -0.5%
Object NA 0.165 - 0.0474 0.033 - 0.095 0.066 - 0.19
Typical Transmission 97.2% (445 - 655 nm) 93.7% (445 - 655 nm) 89.8% (445 - 655 nm)
Fine Focus Travel 10 mm 10 mm 10 mm
  • For more specifications, please see the Field of View tab.
Lens Attachment Core Zoom Lens Camera
Format
Field of View (mm)a
MVR068A (0.6875X) 
Rear Adapter
MVR10A (1.0X)
Rear Adapter
MVR137A (1.375X)
Rear Adapter
MVR20A (2.0X)
Rear Adapter
Low Mag.b High Mag.b Low Mag.b High Mag.b Low Mag.b High Mag.b Low Mag.b High Mag.b
MVR05L (0.5X)
Working Distance: 173 mm
MVR4K
(0.64X - 4.5X)c
2/3" 50.00 7.11 34.38 4.89 25.00 3.56 17.19 2.44
1" - - 50.00 7.11 36.36 5.17 25.00 3.56
1.1" - - 55.00 7.82 40.00 5.69 27.50 3.91
4/3" - - - - 50.00 7.11 34.38 4.89
32 mm - - - - - - 50.00 7.11
MVR10L (1.0X)
Working Distance: 90 mm
2/3" 25.00 3.56 17.19 2.44 12.50 1.78 8.59 1.22
1" - - 25.00 3.56 18.18 2.59 12.50 1.78
1.1" - - 27.50 3.91 20.00 2.84 13.75 1.96
4/3" - - - - 25.00 3.56 17.19 2.44
32 mm - - - - - - 25.00 3.56
MVR20L (2.0X)
Working Distance: 32.3 mm
2/3" 12.50 1.78 8.59 1.22 6.25 0.89 4.30 0.61
1" - - 12.50 1.78 9.09 1.29 6.25 0.89
1.1" - - 13.75 1.96 10.00 1.42 6.88 0.98
4/3" - - - - 12.50 1.78 8.59 1.22
32 mm - - - - - - 12.50 1.78
  • The above fields of view are measured diagonally across a 4:3 aspect ratio sensor. (Horizontal = Diagonal x 0.8 and Vertical = Diagonal x 0.6) 
  • The high and low magnification values are calculated using the zoom lens magnification settings (0.64X - 4.5X).
  • The 0.64X - 4.5X magnification is assuming a 1X lens attachment and 1X rear adapter. This is the magnification range of an entire Resolv4K system; used on its own the MVR4K zoom lens has a magnification range of 0.4X - 2.8X.
Zoom Lens Exploded
Click to Enlarge

An exploded example configuration of a Resolv4K zoom lens system to help assist when assembling and disassembling components. Note the location of the setscrews for each dovetail connection.

Assembly

With the exception of the mounting adapters which use threads, all Resolv4K® zoom lens components are connected together via dovetails that each can be secured using the three included M4 setscrews. To avoid damaging the components, we recommend tightening the setscrews using a 2 mm hex key to a torque of 20 in-oz (0.14 N·m). When assembling and disassembling the zoom lens system, be sure to adjust the appropriate setscrews for the dovetail connections; see the image to the right. We recommend assembling the components in the following order:

  1. Thread the rear adapter's external M42 x 0.75 threads into the mounting adapter's internal M42 x 0.75 threads.
  2. Secure the rear adapter's female dovetail onto the zoom lens' male dovetail using the three included M4 setscrews; see the example configuration to the right for the locations of the setscrew holes.
  3. Secure the zoom lens' female dovetail onto the coupler's male dovetail using the three included M4 setscrews; see the example configuration to the right for the locations of the setscrew holes.
  4. If using an objective, thread it onto the coupler. If using a magnifying lens attachment, connect the coupler's female dovetail to the lens attachment's male dovetail. Secure with the three included M4 setscrews.
  5. Attach the camera to the mounting adapter. If a C-mount camera is used, attach it via the external C-Mount (1.000"-32) threads on the mounting adapter. If an F-mount camera is used, attached it via the male F-mount on the mounting adapter.

For disassembling, we recommend doing the assembly steps in reverse.

Parfocality and Boresight Adjustments

On the rear adapter, users can set the parfocality of the zoom lens system. This allows users to adjust the magnification without losing focus. To set the parfocality:

Rear Adapter
Click to Enlarge

Rear adapters offer boresight and parfocality adjustability. 
  1. Set the magnification to the highest setting and adjust the z-axis until the best focus is achieved.
  2. Set the magnification to the lowest setting. Do not adjust the z-axis to refocus.
  3. To refocus, rotate the parfocality adjustment collar on the rear adapter.
  4. Once in focus, secure the parfocality adjustment collar by tightening the two M3 setscrews using a 1.5 mm hex key; see the image to the right.
  5. Zoom to high magnification. Do not adjust the z-axis to refocus.
  6. Repeat steps 3 and 4.

Boresight can also be adjusted on all rear adapters. This allows users to change the magnification without the image shifting positions. To do this, adjust the M3 setscrews on the top of the adapter using a 1.5 mm hex wrench; see the image to the right. The boresight adjusment can be simplified by aligning one of the screws along either the x- or y-axis of the sensor, then adjusting screws on opposite sides of the adapter, along that axis, to “push” the image in that direction.


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7X Zoom Lens (0.4X - 2.8X Magnification Range)

MVR4K Transmission
Click to Enlarge

This graph shows a typical transmission curve of the MVR4K zoom lens. The lens has an AR coating optimized for 430 nm - 670 nm, denoted by the blue shaded region in the graph above. 
  • 7X Zoom Range (Core Lens Has a Magnification of 0.4X to 2.8X)
  • AR Coated for the 430 nm - 670 nm Range
  • 0.016 - 0.190 System NA; See the Specs Tab for Details
  • Build a Zoomable Tube Lens with a Rear Adapter (Sold Below)

The MVR4K Resolv4K zoom lens features a 7X zoom range with a variable magnification of 0.4X to 2.8X. This manual zoom lens can be adjusted by rotating the recessed collar on the barrel of the lens. It has an afocal design, meaning the lens does not diverge or converge the incoming beam. Designed to offer a wide field of view and high resolution, this lens provides a variable focal length from 64 mm - 448 mm, while maintaining focus at the image plane. The optics in the lens are AR coated for 430 nm - 670 nm, making this lens ideal for imaging applications in the visible range.

This zoom lens features a male dovetail for connecting with a rear adapter (sold below), as well as a female dovetail to attach to a coupler (sold below). Three M4 setscrews for securing the female dovetail and two end caps for protecting the zoom lens are included.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
MVR4K Support Documentation
MVR4KCustomer Inspired! 7X Resolv4K Zoom Lens
$3,740.00
Today

Rear Adapters

Rear Adapter
Click to Enlarge

Rear adapters offer boresight and parfocality adjustability. 
  • Connects a Mounting Adapter to the Zoom Lens
  • Provide an Additional 0.6875X to 2.0X Magnification
  • AR Coated for the 445 nm - 655 nm Range
  • Designed for 2/3", 1", 4/3" or 32 mm (APS) Sensor Format Cameras; See the Table Below
  • Build a Zoomable Tube Lens with the 7X Afocal Zoom Lens (Sold Above)

These Resolv4K rear adapters provide an additional 0.6875X, 1.0X, 1.375X, or 2.0X magnification (see the Magnification Calculation section in the Overview tab above). Each adapter has an ideal sensor format and is AR coated for the 445 nm - 655 nm range; see the table below for specifications. On every adapter, users can adjust the parfocality and boresight, as shown in the image to the right. The parfocality adjustment collar can be secured by tightening the two setscrews with a 1.5 mm hex key. The boresight can be adjusted via the four setscrews using a 1.5 mm hex key. For more information on how to set the parfocality and boresight of a zoom lens system, please see the Assembly and Adjustments tab.

Each rear adapter has M42 x 0.75 threads for attaching to a mounting adapter (sold below) and a female dovetail for attaching to the zoom lens (sold above). Three M4 setscrews for securing the dovetail and two end caps for protecting the adapter are included.

Item #a MVR068A MVR10A MVR137A MVR20A
Magnification 0.6875X 1.0X 1.375X 2.0X
Focal Length 110.0 mm 160.0 mm 220.0 mm 320.0 mm
Sensor Coverage 11 mm
(2/3" Format)
16 mm
(1" Format)
22 mm
(4/3" Format)
32 mm
(APS Format)
Distortion 0.13% 0.16% 0.16% 0.17%
Image NA 0.0748 0.0515 0.0375 0.0258
Typical Transmission 91.7%
(445 - 655 nm)
91.9%
(445 - 655 nm)
95.1%
(445 - 655 nm)
95.2%
(445 - 655 nm)
  • For more specifications, please see the Specs and Field of View tabs.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
MVR068A Support Documentation
MVR068ACustomer Inspired! 0.6875X Resolv4K Rear Adapter, f = 110.0 mm
$1,397.00
Today
MVR10A Support Documentation
MVR10ACustomer Inspired! 1.0X Resolv4K Rear Adapter, f = 160.0 mm
$1,397.00
Today
MVR137A Support Documentation
MVR137ACustomer Inspired! 1.375X Resolv4K Rear Adapter, f = 220.0 mm
$1,815.00
Today
MVR20A Support Documentation
MVR20ACustomer Inspired! 2.0X Resolv4K Rear Adapter, f = 320.0 mm
$1,925.00
Today

Lens Attachments

Item #a MVR05L MVR10L MVR20L
Focal Length 200.0 mm 100.0 mm 50.0 mm
Working Distance 173 mm 90 mm 32.3 mm
Objective Coverage 50.0 - 7.1 mm
(Low - High Mag)
25.0 - 3.55 mm
(Low - High Mag)
12.5 - 1.78 mm
(Low - High Mag)
Distortion 1.58% to -0.031% -1.77% to -0.044% -0.3% to -0.5%
Object NA 0.165 - 0.0474 0.033 - 0.095 0.066 - 0.19
Typical Transmission 97.2% (445 - 655 nm) 93.7% (445 - 655 nm) 89.8% (445 - 655 nm)
Fine Focus Travel 10 mm 10 mm 10 mm
  • For more specifications, please see the Specs and Field of View tabs.
  • Optional Magnifying Lens Attachments Provide an Additional 0.5X to 2X Magnification
  • AR Coated for the 445 nm - 655 nm Range
  • 10 mm of Fine Focus Adjustment
  • Compatible with the MVRLC Coupler (Sold Below)

These magnifying lens attachments provide an additional 0.5X, 1.0X, or 2.0X magnification (see the Magnification Calculation section in the Overview tab above). Every attachment has a male dovetail for connecting to the MVRLC coupler (sold below). Each lens attachment is AR coated for the 445 nm - 655 nm range and offers 10 mm of fine focus adjustment. See the table to the right for specifications. Two end caps are included for protecting the lens.

Note: A magnifying lens attachment is optional in a zoom lens system. A user-defined objective may be used in place of a lens attachment.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
MVR05L Support Documentation
MVR05LCustomer Inspired! 0.5X Resolv4K Magnifying Lens Attachment, f = 200.0 mm
$1,853.00
Today
MVR10L Support Documentation
MVR10LCustomer Inspired! 1.0X Resolv4K Magnifying Lens Attachment, f = 100.0 mm
$1,853.00
Today
MVR20L Support Documentation
MVR20LCustomer Inspired! 2.0X Resolv4K Magnifying Lens Attachment, f = 50.0 mm
$2,964.00
Today

Couplers

  • Connects the Zoom Lens to a Lens Attachment or Objective
  • Three Threaded Couplers for Compatibility with Objectives 
    • MVRM25: M25 x 0.75 Internal Threading
    • MVRRMS: RMS Internal Threading
    • MVROC: M26 x 0.706 Internal Threading

The MVRLC coupler allows users to connect a lens attachment to their Resolv4K zoom lens system. It features a male dovetail for attaching to the zoom lens (sold above) and a female dovetail for attaching to a lens attachment (sold above). Three M4 setscrews are included for securing the female dovetail. 

We also offer three couplers for incorporating objectives into a Resolv4K zoom lens system. The MVRM25 coupler is compatible with M25 x 0.75-threaded objectives, while the MVRRMS is compatible with RMS-threaded objectives. The MVROC coupler can be used to connect M26 x 0.706-threaded objectives to the lens system. Each of these couplers has a male dovetail for attaching to the zoom lens and internal threads compatible with their respective objective thread type.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
MVRLC Support Documentation
MVRLCCustomer Inspired! Resolv4K Coupler for Lens Attachments
$132.00
Today
MVRM25 Support Documentation
MVRM25Customer Inspired! Resolv4K Coupler for M25 x 0.75-Threaded Objectives
$132.00
Today
MVRRMS Support Documentation
MVRRMSCustomer Inspired! Resolv4K Coupler for RMS-Threaded Objectives
$132.00
Today
MVROC Support Documentation
MVROCCustomer Inspired! Resolv4K Coupler for M26 x 0.706-Threaded Objectives
$132.00
Today

Mounting Adapters

  • Connect a Camera to the Rear Adapter
  • Two Mounting Options
    • External C-Mount (1.000"-32) Threading
    • Nikon Male F-Mount

The MVRCMC and MVRCMF adapters allow users to mount a camera to their Resolv4K zoom lens system. The MVRCMC adapter has external C-mount (1.000"-32) threading for attaching a standard C-mount camera, including our scientific cameras, directly to the system. Additionally, when used with the SM1A9 or SM1A10 adapters, this C-mount adapter can integrate Thorlabs' SM1-threaded optomechanics. The MVRCMF adapter has a Nikon male F-mount to attach Nikon camera bodies. Both adapters have internal M42 x 0.75 threading for connecting directly to the Resolv4K rear adapters sold above.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
MVRCMC Support Documentation
MVRCMCCustomer Inspired! Resolv4K C-Mount Adapter
$77.00
Lead Time
MVRCMF Support Documentation
MVRCMFCustomer Inspired! Resolv4K F-Mount Adapter
$77.00
Today
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