What's the difference between a Ef lens or a Ef-S lens null

One addition that previous answer did not make clear is that EF-S lenses are also measured in full frame focal length sizes just like EF or full-frame lenses. In other words, an EF-S lens listed at say 60mm would have an effective focal length of 96mm, just like a full frame lens. The only real difference between the EFS and EF lens is that the EF-S lens is designed to fit only Crop Sensor or APS-C cameras. But the focal lengths are the same as Full Frame cameras, even though the effective focal lengths are 1.6 (times) what it says on the EF-S lens. So, go figure!

EF lenses are designed for 35mm sensors and, going back more than 30 years, 35mm film cameras. The EOS 90D is an APS-C sensor which is 37.5% smaller than a standard 35mm sensor. EF-S lenses are designed for the smaller APS-C sensor. That being said, the EF lenses still work on APS-C sensor cameras, like the 90D, there is just a difference in how the lenses perform. Primarily, the effective focal length will be increased by 1.6x, resulting in a 50mm EF lens having an effective focal length of 80mm on the APS-C sensor camera. There are also changes related to depth of field related to the lens' aperture. While EF lenses are compatible with APS-C sensor cameras, EF-S lenses are not compatible with full frame, 35mm sensor cameras (without an adapter, at least, but there would still be an impact on the image).

The mount that goes on the lens

“What's the difference between a Ef lens or a Ef-S lens”

Asked by Rick 6 years ago

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Canon - EOS 90D DSLR Camera with EF-S 18-135mm Lens - Black-Front_Standard

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One addition that previous answer did not make clear is that EF-S lenses are also measured in full frame focal length sizes just like EF or full-frame lenses. In other words, an EF-S lens listed at say 60mm would have an effective focal length of 96mm, just like a full frame lens. The only real difference between the EFS and EF lens is that the EF-S lens is designed to fit only Crop Sensor or APS-C cameras. But the focal lengths are the same as Full Frame cameras, even though the effective focal lengths are 1.6 (times) what it says on the EF-S lens. So, go figure!
Answered by phillip 6 years ago
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EF lenses are designed for 35mm sensors and, going back more than 30 years, 35mm film cameras. The EOS 90D is an APS-C sensor which is 37.5% smaller than a standard 35mm sensor. EF-S lenses are designed for the smaller APS-C sensor. That being said, the EF lenses still work on APS-C sensor cameras, like the 90D, there is just a difference in how the lenses perform. Primarily, the effective focal length will be increased by 1.6x, resulting in a 50mm EF lens having an effective focal length of 80mm on the APS-C sensor camera. There are also changes related to depth of field related to the lens' aperture. While EF lenses are compatible with APS-C sensor cameras, EF-S lenses are not compatible with full frame, 35mm sensor cameras (without an adapter, at least, but there would still be an impact on the image).
Answered by th58pz700u 6 years ago
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The mount that goes on the lens
Answered by Willijames 6 years ago
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