EF-M

What Is An EF-M Lens? With the launch of the Canon EOS M mirrorless system in 2013, came the EF-M mount.  A mount that allowed Canon engineers to create a smaller line of lenses that complimented the smaller body size of the EOS M series mirrorless cameras with APS-C sensors. There is an EF to EF-M adapter which allows you to use EF or EF-S lenses on an EF-M mount camera, and still maintain full electronic control and autofocus. There is not, however, an RF to EF-M adapter, so it’s not possible to use EF-M lenses at all on Canon’s …

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EF-S

What Is A Canon EF-S Lens? EF-S lenses are designed specifically for Canon APS-C sensor cameras.  It is not possible to mount an EF-S lens on an APS-H, or a full frame camera. Since crop sensor cameras do not make use of the full width of full frame lenses, you end up carrying around a lot more lens than is really necessary! EF-S lenses are lighter and smaller, because they don’t need to cover such a large image circle. Most popular EF-S lenses: Canon EF-S 24mm f/2.8 STM Pancake | Canon EF-S 10-22 f/3.5-4.5 | Canon EF-S 10-18mm f/4.5-5.6 IS STM   Additional Reading …

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EOS

What Is An EOS Camera? EOS stands for Electro-Optical System and it was introduced in 1987 by Canon to unveil their line of autofocus SLR cameras with the new EF Mount lens range.  Of course today, this name has stuck, and it now encompasses their DSLR lineup and their mirrorless cameras as well.  The first EOS camera was the Canon EOS 650 35mm film camera, and this was followed in 2000 with Canon’s first DSLR, the Canon EOS D30.  These days the EOS lineup has expanded to include the EOS-M Mirrorless system, the EOS R mirrorless full-frame cameras with the …

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EOS M

What Are Canon EOS M Cameras? EOS M is Canon’s crop sensor (APS-C) mirrorless camera lineup which uses the EF-M lens mount. These mirrorless cameras do not contain the mirror and optical viewfinder of a traditional DSLR, so they are much more compact, instead using either an EVF or simply liveview on the LCD for composing the image. They use the same APS-C sensors from Canon’s DSLR cameras, though, so the image quality is very similar and regular EF or EF-S lenses from the DSLRs can be used with EOS M cameras by way of an adapter. –>> These are the …

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Extender

What Is An Extender? An extender is the same thing as a teleconverter, it’s an optical accessory that sits between the lens and the camera and multiplies the focal length. One fact of note is that Canon call theirs ‘extenders’, whilst Nikon and other manufacturers call theirs ‘teleconverters’. This results in a split in terminology that you will find in books and all over the internet! Extenders can be a very cost-effective way to reach longer focal lengths that are typically useful for sports and wildlife photography.  Prices of longs lenses increase almost exponentially, but an extender can get you great results …

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Extension Tube

What Is An Extension Tube? First things first, an extension tube should not be confused with an extender! An extender, sometimes called a teleconverter, is a VERY different thing. You can read more about extenders in our feature tutorial: The Ultimate Guide to Extenders. Or catch the quick version in the extender entry of the glossary. An extension tube is simply a spacer that goes between the lens and the camera, they contain no optical elements whatsoever, so whilst they look like a lens of some sort at first glance, this is not actually the case. There’s no glass in …

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