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Olympus M.Zuiko Digital MC-20 2X Teleconverter Instruction Manual

Olympus M.Zuiko Digital MC-20 2X Teleconverter FEATURE

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Olympus M.Zuiko Digital MC-20 2X Teleconverter

Olympus M.Zuiko Digital MC-20 2X Teleconverter PRODUCT

About Olympus

Olympus Corporation is a Japanese multinational corporation specializing in manufacturing and selling optical and imaging products, medical equipment, and scientific equipment. The company has a long history and has significantly contributed to various fields, including photography, medical imaging, and scientific research.

Before use

  • Be sure to update the firmware of the lens before mounting it on the teleconverter (MC-20).
  • When the teleconverter is used, the composite focal distance and iris value of the lens are multiplied by 2.
  • The aperture value displayed on the camera is the composite aperture value.

Name of parts (Fig. 1)Olympus-M.Zuiko-Digital-MC-20-2X-Teleconverter-Instruction-Manual-1

  1. Front cap (BC-3)
  2. Rear cap
  3. Lens release button
  4. Mount Index
  5. Electrical contacts

* You cannot use another front cap than BC-3.

Mounting (Fig. 2)Olympus-M.Zuiko-Digital-MC-20-2X-Teleconverter-Instruction-Manual-2

  1. Mount the teleconverter on the camera.
  2. Mount the shooting lens.

Applicable Lenses

For details on applicable lenses, visit the Olympus website or contact the Olympus customer support center.

* Do not attach lenses except supported. There is a risk of performance degradation or damage to the body and lens.

Main Specifications

  • Lens configuration: 4 groups, 9 lenses 
  • Weight: 150 g (5.3 oz.) (excluding cap)
  • Dimensions: Max. dia. Ø 59.8 (2.4 in.) × length 25.9 mm (1.0 in.)

* Specifications are subject to change without any notice or obligation on the part of the manufacturer.


Be Sure to Read the Following

Warnings: Safety Precautions

  • Do not view the sun through the lens. It may cause blindness or vision impairment.
  • Do not leave the lens without the cap. If solar light is converged through the lens, a fire may result.
  • Do not point the camera lens at the sun. Sunlight will converge in the lens and focus inside the camera, possibly causing a malfunction or fire.

Handling the teleconverter and lens

  • More than one MC-20 cannot be used at a time. The MC-20 also cannot be used with another lens converter at the same time.
  • Do not hold only the camera body without holding the lens. The splashproof and optical performance may be compromised.
    Do not touch the electrical contacts on the teleconverter.
  • Olympus has no responsibility for the use of this product, which may be prohibited by regulations in countries or regions other than the country or region in which it was purchased.


Blow any dust off the lens with a commercially available blower.

European Technical Customer Support

FAQS About Olympus M.Zuiko Digital MC-20 2X Teleconverter

Which optics work with the Olympus MC 20?

Only the Olympus 40-150 mm f/2.8 Pro, 300 mm f/4 Pro, and 100-400 mm f/5-6.3 IS are now compatible with the MC-20.

What is a 2x teleconverter’s focal length?

The apparent focal length will double with a 2x teleconverter.

What is the stop count for a 2x teleconverter?

2 stops

Can other cameras be used with Olympus lenses?

The lenses cannot be switched out.

Can I use different lenses with my Olympus?

On your Olympus, you may use practically any lens.

Does a teleconverter change the quality of the image?

When utilizing one, it has a negative impact on the visual quality.

How does the focal length change with a teleconverter?

Actually, there is no change to the focal length.

How is teleconverter calculated?

Add the teleconverter’s multiplication factor to the focal length.

How is aperture determined when using a teleconverter?

The focal length of the lens is multiplied by the teleconverter.

How is an Olympus lens mounted?

The Micro Four Thirds lens mount is used by Olympus mirrorless cameras.

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