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All Products / Optics / Optical Filters / Neutral Density (ND) Filters / Circular Variable Neutral Density (ND) Filters
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50mm Diameter Unmounted 0.04-1.0 OD, Circular Variable Neutral Density (ND) Filter

Unmounted Circular Variable Neutral Density (ND) Filters

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Stock #43-763 3-5 days
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Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
A$552.00
Qty 1-10
A$552.00
Qty 11+
A$497.60
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Specifications

General

Type:
Neutral Density Filter
Linearity (%):
±5

Physical & Mechanical Properties

Inner Diameter (mm):
7.5
Outer Diameter (mm):
50.0
Thickness (mm):
1.52
Thickness Tolerance (mm):
±0.25
Parallelism (arcmin):
±3
Dimensional Tolerance (mm):
±0.10 ID, ±0.20 OD

Optical Properties

Angle of Incidence (°):
0.00
Optical Density OD (Average):
0.04 - 1.0
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
B270
Coating:
Variable
Surface Quality:
60-40
Blocking Wavelength Range (nm):
400 - 700
Optical Density Tolerance (%):
±5
Coating Specification:
Continuously Variable Inconel from 0 - 270°

Threading & Mounting

Mount:
Unmounted

Regulatory Compliance

Reach 181:
Compliant
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RoHS 2015:
Compliant
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Certificate of Conformance:
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Product Details

  • Continuously Variable Over 270°
  • Spectrally Flat from 400-700nm
  • Mounted and Unmounted Versions Available

Circular Variable Neutral Density (ND) Filters are continuously variable over 270° of the filter. These filters provide linear attenuation of incident light by rotating the filter. Designed to be spectrally flat from 400 to 700nm, they provide excellent attenuation for spectrometers and other optical instruments. Circular Variable Neutral Density (ND) Filters, with a durable anodized aluminum mount, have an indicator arrow that accurately identifies the angular position of the filter for increased repeatability. The 50mm OD filters are available mounted or unmounted. The 360° rotating mount comes complete with a 4" Length, 0.5" Diameter stainless steel post. 

Technical Information

 
Optical Density
Unmounted
 Mounted
  25.4mm Outer Diameter (OD)
7.5mm Inner Diameter (ID)		 50.0mm Outer Diameter (OD)
7.5mm Inner Diameter (ID)		 100.0mm Outer Diameter (OD)
25.4mm Inner Diameter (ID)		 50.0mm Outer Diameter (OD)
7.5mm Inner Diameter (ID)
0.04-1.0 #43-759 #43-763 #43-767 #54-534
0.04-2.0 #43-760 #43-764 #43-768 #54-535
0.04-3.0 #43-761 #43-765 #43-769 #54-536
0.04-4.0 #43-762 #43-766 #43-770 #54-537

Accessories

Title CompareStock Number  Price Buy
Circular Variable Filter Mount Only, 50mm Diameter #54-570 A$339.20 Qty 11+ A$305.60   Request Quote
  • Contact Us
    ×
50mm Diameter Substrate for Circular Variable Filter #47-376 A$97.60 Qty 11+ A$88.00   Request Quote
  • 3-5 days
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Frequently Purchased Together

Resources

Filter
Application Note

Understanding Neutral Density Filters

Neutral Density (ND) Filters are designed to evenly reduce transmission. For more information on specifications and products, read more at Edmund Optics.

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FAQ

What is an ND Filter?

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FAQ

Can I place ND filters back-to-back and increase optical density?

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FAQ

What is the difference between using an absorptive ND filter and a reflective ND filter?

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FAQ

How should I orient my reflective ND or interference filter?

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Glossary term

Continuously Variable Apodizing Filter

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Glossary term

Neutral Density Filter (ND)

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Application Note

Optical Filters

Do you want to learn about optical filters? Find terminology, fabrication techniques, a selection guide, and application examples at Edmund Optics.

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FAQ

How do I clean my filters?

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FAQ

What is the largest diameter filter available from Edmund Optics®?

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FAQ

What are some of the most common filter substrates?

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FAQ

How do I select the right filter for my application?

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What types of filters can Edmund Optics® manufacture?

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Glossary term

Filter

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Glossary term

Optical Density (OD)

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Glossary term

Stopband

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Video

Removing Protective Plastic Coating

A protective plastic coating protects a variety of our flat optics, such as optical windows, optical mirrors, and beamsplitters, from scratches during shipping.

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Glossary term

Transmission

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FAQ

How do I clean my optics?

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Glossary term

Clear Aperture (CA)

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Edmund Optics Global Manufacturing Facilities

Edmund Optics® (EO) manufactures millions of precision optical components and subassemblies every year in our 5 global manufacturing facilities.

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Metrology at Edmund Optics: Measuring as a Key Component of Manufacturing

Learn about the metrology that Edmund Optics® uses to guarantee the quality of all optical components and assemblies.

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Glossary term

Surface Quality

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