Both the Canon DLSR series and the Canon mirrorless R series of cameras come in full frame sensors and smaller "crop" sized sensor versions. The M series cameras all have the smaller APS-C "crop" sensors.

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It's definitely a challenge to understand Canon lens compatibility between the different lenses and Canon camera lens mounts. This compatibility guide will help make it easy for you to understand which lenses can be used on which cameras.

There are a few Canon lens adapters that give you the ability to adapt your lens to a different mounting system.  The adapter is attached to the front of your camera and then the lens is attached to the adapter.

Cleary the Canon 17-40mm wide-angle zoom was the most popular super wide angle lens Canon had. Is it still a good buy these days. Thoughts on whether the Canon EF 17-40mm lens is worth buying and is the 17-40 good for portraits?

You can easily tell which lens mount system your camera has by looking for the type of marking on the front of your camera.

The adapters give you full functional compatibility, including auto-focusing, image stabilization, and aperture control. More on that in a minute. Lets get right to what you were looking for, Canon lens compatibility between Canon lenses and cameras.

The 3rd version is the one I chose. It has an extra adjustment ring that can be set to adjust various camera settings by simply rotating it. Here is my complete review of the EF-EOS R adapter.

Any EF lenses they will fit on any of the 5 different Canon camera types, although you will need an adapter for these lenses to attach to the M series and R series of mirrorless cameras.

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EF has by far the most extensive lens choices, new and used. The EF lenses are like type O negative blood. They're also the "universal donor" and can be used on all 5 camera lens mounts (some with adapter)

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There are currently 5 different Canon camera lens mounts. They are the EF,  EF-S,  EF-M,  RF, and RF-S. These 5 mounts fit on 3 different types of Canon digital cameras. The 3 types of Canon cameras are the original Canon DSLR cameras, the first mirrorless Canon M class of digital mirrorless cameras, and the most recent R class of Canon mirrorless cameras.

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Also note that with all of the smaller sensor cameras in all 3 different types of mounts, the EF-S, the M, and the RF-S, you get a "crop factor" of 1.6x. That means whatever lens you use, your effective focal length is 1.6 times the actual focal length of the lens. Here's my simplified explanation of Crop Factor.

EOS M is the least flexible system of the 3 Canon lens mount systems. The lens selection is limited and Canon will not be making any more new M lenses.

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Bruce Lovelace is the publisher of Canon Camera Geek. Read more about him on the About Page. He also publishes how to articles and camera gear reviews at the Photography Tips website.

If starting as a first time photographer who wants an ILC (interchangeable lens camera) system, one of the Canon mirrorless "R" cameras will give you incredible features and image quality.

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Which Canon portrait lens is right for you? Lens guide on how to choose the best Canon portrait lens and how to use best canon lens for portrait photography

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My goal is to provide useful information and sometimes I recommend products that I believe will help you with your photography, but there are no guarantees. I have used most, but not every single one of these products personally. There are simply too many (millions) for one person to try. I base my recommendations on the performance of the product, other photographers' feedback I gather, as well as my personal experiences with photography equipment since 1969. Yes, I'm that old!  THANK SO MUCH!  Bruce

Some Canon lenses do fit on all Canon cameras, some of which require an adapter to make them compatible. Other Canon lenses will only work on their own series of cameras and still other, smaller Canon lenses will not work on the larger Canon camera bodies. See the compatibility table below.

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Beginning macro shooters, you want to find the best macro lens for Canon to start with. Here is what you need to know in this simple beginners guide

EF-EOS R. There are 3 versions of this adapter. All of them allow you to use EF and EF-S lenses on the newest Canon mirrorless cameras that are part of the "R" line of cameras. One version has a drop in filter drawer. One is a standard version.

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There are two big takeaways you can see from the table above. First, EF lenses are the most versatile because they will fit on ALL 5 different Canon camera mounts. Secondly, M lenses are the least versatile, as they can only be used on the Canon M mount cameras.

With that said, the M cameras still may appeal to you if you want a small, capable camera and don't need more than a few lenses.

Is the Canon 85mm lens one of the best portrait lenses for the money? Comparison of 85mm lenses will help you choose which Canon 85mm lens is right for you.