The Auto Extension Tube Set for Micro Four Thirds Lenses by Kenko is a set of two extension tubes for mirrorless interchangeable lens cameras. This set has tubes of 10 mm and 16mm. The tubes can be used individually or in combination to obtain the desired magnification.

Extension tubes are hollow cylinders without optics designed to enable a camera's lens to focus closer than its minimum focusing distance and therefore provide more magnification. They are placed between the lens and body and are particularly useful in allowing lenses without macro capability to shoot macro, but in general, they offer increased magnification for whatever need. 

An extension tube increases lens magnification by an amount equal to the extension distance divided by the lens focal length. For example, adding a 25 mm extension tube to a 50 mm lens will give a magnification gain of 0.5X. Therefore, if the lens's original magnification was 0.15X, then the new magnification will be 0.15X + 0.5X = 0.65X.

Kenko's Auto Focus extension tubes are designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with Micro Four Thirds lenses.

Two Extension Tubes    Compatible with Micro Four Thirds Lenses    Use Individually or Combined    Macro Conversion

Related Questions and Answers

Q: 1. Does this adapter maintain autofocus?

A: It is a manual focus only adapter. This Viltrox would support AF but it is not a "booster" adapter: https://bhpho.to/3tewTL7

Q: 2. can I used canon lense with panasonic Linux gh4 camera with help of this adapter

A: No, this is an adaptor for 4/3 (older Olympus and Panasonic) lenses. Vello have two Canon to Micro 4/3 adapters on B&H: one for Canon EF/EF-S lenses and one for Canon FD lenses. However, neither of these provides automatic aperture control, focusing, or exposure metering.

Q: 3. Is this lens good for infrared photography?

A: If you have a camera with Micro Four Third mount that's converted for Infrared photography you can use the Venus Optics Laowa 7.5mm f/2 MFT Lens for Micro Four Thirds (Auto Aperture Version) with it.

Q: 4. Will it work with 20, 24, 28, 35mm lenses with the aperture open? The Viltrox doen't.

A: It would have to be a G type lens. If the lens is E type the Vello Accelerator Lens Adapter cannot open the aperture.

Q: 5. will this work for Nikon APS-C lenses?

A: Yes that should work.

Q: 6. Can you explain why this would not work with all Canon EF-Mount compatible lenses? I have the Sigma 24-70 1:2.8 DG HSM lens for example. It is not listed in Vello's compatibility chart, though other Sigmas are.

A: The S in EF-S stands for short. The rear optic protrudes out of the back of the lens puting it closer to the focal point / sensor of a Canon APS-C sensor. This protrusion is what will stop an EF-S lens from attaching to this adapter.

Q: 7. Does this work with the Nikon Z9?

A: The Venus Optics Laowa 7.5mm f/2 MFT Lens for Micro Four Thirds (Auto Aperture Version) is not compatible with the Nikon Z9; it is only compatible with cameras having a Micro Four Thirds lens mount.

Q: 8. Will this lens activate peaking and image magnification when the focus ring is turned?

A: Yes. For example Sony and Panasonic come fully equipped with two powerful tools for manual focusing. This is useful for photographers using old manual lenses, with an adapter, or those filming videos.

Q: 9. When using this lens on a BMPCC 4K, will the lens automatically adjust the aperture in video going from outdoor to indoor?

A: If you set your camera to "Iris + Shutter" Mode (or "Shutter + Iris" Mode), the Blackmagic Design Pocket Cinema Camera 4K will maintain the correct exposure level by automatically adjusting the aperture and shutter when using the Venus Optics Laowa 7.5mm f/2 MFT Lens for Micro Four Thirds (Auto Aperture Version).

Q: 10. does this adapter change the focal length of the lens used?

A: It doesn't change focal length. Just allows four thirds lenses to work on Micro four thirds cameras. Some lenses however, focus better than others with this adapter and I wouldn't recommend attaching heavy lenses to it.