Oil Darkfield Condenser for AmScope B660, B690, T660 & T690 Series Microscopes

SKU: DK-OIL200

Availability: In Stock

Regular price $165.99 $137.99

The Higher the Magnification - The More Detail You'll See

Magnification 40x
Magnification 1000x
Magnification 2500x

Magnification is the ability of your microscope to make small objects seem larger. As the magnification increases the area being viewed will be decrease is size but the detail of the area being viewed will improve.

Amscope microscopes come with multiple magnifications to aid you in finding the proper magnification for viewing each specimen.

Camera Connection Types

When comparing 2.0 and 3.0 there are few major differences. First the transfer rates. USB 2.0 offers transfer rates of 480 Mbps and USB 3.0 offers transfer rates of 4.8 Gbps - that's 10 times faster.

Camera Resolution

The most important factor in ensuring successful microscopic imaging is choosing the appropriate optics and camera for your application that gives you more data and higher image quality. When selecting a microscope camera, it is best to base your decision on the most important requirements for your microscopic observation.

Key Features

  • This is a high quality oil immersion darkfield condenser for AmScope B660, B690, T660 & T690 series compound microscopes.
  • Darkfield Condenser: Oil
  • NA: 1.36-1.25
  • Shipping Weight: 1 lb

The darkfield condenser allows you to render detail in specimens that would otherwise be transparent. Using principles of light-diffraction to suppress field-illumination, the condenser illuminates edges of cells, microorganisms, and other objects. This is particularly useful for live blood analysis.

This darkfield condenser is designed for use with immersion oil. The 1.36 maximum numerical aperture will accommodate higher-magnification objective lenses with numerical apertures up to 1.25. However, it is recommended to use objective lenses with numerical apertures at or below 1.0 for true darkfield. Objective lenses designed for darkfield, such as those with iris-control like our PA100X-IRIS, are recommended for high magnifications. As well, magnifications of 10X and below may experience vignetting, in which case a dry condenser is preferable.

The condenser has two centering screws for properly aligning the illumination halo. This allows you to optimize the lighting on microscopes that do not have centerable condenser-holders.

This condenser is designed to work with compound microscopes with a 37mm front-mount condenser holder. Compatible models include: B660, B690, T660, T690, FM690

Condenser Compatibility
Condenser Mount front mount
Mounting Diameter 37mm
Model Compatibility B660, B690, T660, T690, FM690
Condenser Specifications
Numerical Aperture 1.25-1.36
Immersion Medium oil
Centerable Optics Yes
application Condenser-Compound
condenser application Compound
condenser immersion Oil
condenser iris Without Iris
condenser microscope model B660 Series, B690 Series, T660 Series, T690 Series
condenser optic NA 1.36-1.25
condenser optics Condenser-NA 1.36-1.25
condenser type Darkfield
immersion Condenser-Oil
Manufacturer AmScope
ns_spec_table Condenser-B/T 660/690 Series
prop 65 Prop 65 Warning
special feature Condenser-Without Iris
type Condenser-Darkfield

AmScope products are warranted against manufacturer’s defects in material and workmanship from the original date of purchase, for the following years: 


• Five Year Warranty for Microscopes: All our microscopes come with a five (5) year factory warranty against manufacturing defects, covering labor and parts. 
• One Year Warranty for Telescopes: All our telescopes come with a one (1) year warranty, except when specified in the description. 
• One Year Warranty for Accessories: All our microscope accessories (USB cameras, illuminators, illumination, dust covers, and etc.) come with a one (1) year warranty, except when specified in the description.
• One Year Warranty for Items labeled as “Product Ships From Manufacturer”: All products that are shipped directly from the manufacturer come with a one (1) year warranty, except when specified in the description. 

Warranty does not apply for consumable accessories and parts such as bulbs, batteries, fuses, cords, optical components or any add-on accessories such as mechanical specimen holders that are not built into the microscope stage as an integral part of the original manufacture, etc. Warranty does not cover microscopes, lenses cameras or other accessories that have become inoperable due to dirt or damage due to misuse or lack of maintenance. 

Note: Buyers are responsible for return shipping and handling cost for warranty services. Our warranty covers parts and labor only.

The darkfield condenser allows you to render detail in specimens that would otherwise be transparent. Using principles of light-diffraction to suppress field-illumination, the condenser illuminates edges of cells, microorganisms, and other objects. This is particularly useful for live blood analysis.

This darkfield condenser is designed for use with immersion oil. The 1.36 maximum numerical aperture will accommodate higher-magnification objective lenses with numerical apertures up to 1.25. However, it is recommended to use objective lenses with numerical apertures at or below 1.0 for true darkfield. Objective lenses designed for darkfield, such as those with iris-control like our PA100X-IRIS, are recommended for high magnifications. As well, magnifications of 10X and below may experience vignetting, in which case a dry condenser is preferable.

The condenser has two centering screws for properly aligning the illumination halo. This allows you to optimize the lighting on microscopes that do not have centerable condenser-holders.

This condenser is designed to work with compound microscopes with a 37mm front-mount condenser holder. Compatible models include: B660, B690, T660, T690, FM690

Condenser Compatibility
Condenser Mount front mount
Mounting Diameter 37mm
Model Compatibility B660, B690, T660, T690, FM690
Condenser Specifications
Numerical Aperture 1.25-1.36
Immersion Medium oil
Centerable Optics Yes

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