extension tube question. DougFraser. Contributor. Options. 02-23-2021 12:20 PM. I need to know the inside diameter of the Canon 12mm extension tube . I want to use the extension tube between my 1.4X III teleconverter and my 100mm 2.8 L macro (which are otherwise non-compatible). I have read where people are using this combo successfully BUT the Amazon.com: extension tube canon. Skip to main content.us. Delivering to Lebanon 66952 Choose location for most accurate options All. Select the department you Extension tube sizes. Extension tubes come in different sizes, for examples Canon offers two sizes, 12mm and 25 mm in length. Other manufacturers offer different lengths, Kenko offers a set of three sizes 12 mm, 20 mm, and 36 mm. Fotodiox offers a set of three sizes 7 mm, 14 mm, and 28 mm. As the length of the tube increases the magnification Most extension tubes for Canon's EF mount that cost more that $50 should pass power and communication between the lens and the body. If your tubes support "auto focus", then they have the required electrical connections, and you should be able to focus your STM lens. Canon EF 25 II Extension Tube. 4.5 out of 5 stars 226. $165.00 $ 165. 00. FREE delivery Wed, Oct 18 . Or fastest delivery Tomorrow, Oct 15 . Only 7 left in stock. The EF25II is longer than the EF12II. Both feature new digitally optimized air ;) Actually the only difference with the original versions is that the new versions let you mount EF-S lenses. I use a set of three Kenko tubes and they work fine for me with light lenses but will not mount EF-S lenses. AF quits on most Canon bodies if the camera Extension Tubes. Extension tubes are a way of extending the length of your existing lens. Camera extension tubes fit between the body of the camera and the built-in lens and will make your lens appear longer than it previously was. The main purpose of them is to aid the photographer in moving closer to an object, while at the same time being Canon EOS 550D Canon EF -S 55-250mm f/4-5.6 IS In reply to jopezu • Oct 25, 2013 The 50/1.8D on extension tubes works okay for casual macro on the cheap if YwMn.

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