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Michael C
Michael C
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The terms Ultra-Wide and Standard apply more to the resulting field of view in an image than the actual focal length of the lens used to produce the image. Field of view is a result of both the focal length of the lens and the size of the recording media. In large format photography a 50mm lens is considered Wide Angle. In 35mm photography it is considered Normal. With sensors such as those APS-C size and smaller it is considered Telephoto. In all three cases the description is based on the field of view of the resulting image.

For lenses such as the EF-S 15-85mm f/3.5-5.6 that may only be used on an APS-C camera body the resultingthe resulting images have the same angle of view as a 24-135mm lens would have on a camera with a 35mm-film sized "full frame" sensor. Thus it is considered a Standard zoom because of the field of view of the photos that can be taken with it.field of view of the photos that can be taken with it. Likewise, if the EF 17-40mm f/4 lens is mounted on an APS-C body, the resulting field of viewthe resulting field of view is equivalantequivalent to a 28-65mm zoom lens on a full frame camera. In this case it would also be considered a Standard Zoom Lens. Canon also makes an EF-S 10-22mm f/3.5-4.5 lens that is considered an Ultra-Wide zoom lens on APS-C cameras.

The terms Ultra-Wide and Standard apply more to the resulting field of view in an image than the actual focal length of the lens used to produce the image. Field of view is a result of both the focal length of the lens and the size of the recording media. In large format photography a 50mm lens is considered Wide Angle. In 35mm photography it is considered Normal. With sensors such as those APS-C size and smaller it is considered Telephoto. In all three cases the description is based on the field of view of the resulting image.

For lenses such as the EF-S 15-85mm f/3.5-5.6 that may only be used on an APS-C camera body the resulting images have the same angle of view as a 24-135mm lens would have on a camera with a 35mm-film sized "full frame" sensor. Thus it is considered a Standard zoom because of the field of view of the photos that can be taken with it. Likewise, if the EF 17-40mm f/4 lens is mounted on an APS-C body, the resulting field of view is equivalant to a 28-65mm zoom lens on a full frame camera. In this case it would also be considered a Standard Zoom Lens. Canon also makes an EF-S 10-22mm f/3.5-4.5 lens that is considered an Ultra-Wide zoom lens on APS-C cameras.

The terms Ultra-Wide and Standard apply more to the resulting field of view in an image than the actual focal length of the lens used to produce the image. Field of view is a result of both the focal length of the lens and the size of the recording media. In large format photography a 50mm lens is considered Wide Angle. In 35mm photography it is considered Normal. With sensors such as those APS-C size and smaller it is considered Telephoto. In all three cases the description is based on the field of view of the resulting image.

For lenses such as the EF-S 15-85mm f/3.5-5.6 that may only be used on an APS-C camera body the resulting images have the same angle of view as a 24-135mm lens would have on a camera with a 35mm-film sized "full frame" sensor. Thus it is considered a Standard zoom because of the field of view of the photos that can be taken with it. Likewise, if the EF 17-40mm f/4 lens is mounted on an APS-C body, the resulting field of view is equivalent to a 28-65mm zoom lens on a full frame camera. In this case it would also be considered a Standard Zoom Lens. Canon also makes an EF-S 10-22mm f/3.5-4.5 lens that is considered an Ultra-Wide zoom lens on APS-C cameras.

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Michael C
Michael C
  • 176.3k
  • 10
  • 213
  • 578

The terms Ultra-Wide and Standard apply more to the resulting field of view in an image than the actual focal length of the lens used to produce the image. Field of view is a result of both the focal length of the lens and the size of the recording media. In large format photography a 50mm lens is considered Wide Angle. In 35mm photography it is considered Normal. With sensors such as those APS-C size and smaller it is considered Telephoto. In all three cases the description is based on the field of view of the resulting image.

For lenses such as the EF-S 15-85mm f/3.5-5.6 that may only be used on an APS-C camera body the resulting images have the same angle of view as a 24-135mm lens would have on a camera with a 35mm-film sized "full frame" sensor. Thus it is considered a Standard zoom because of the field of view of the photos that can be taken with it. Likewise, if the EF 17-40mm f/4 lens is mounted on an APS-C body, the resulting field of view is equivalant to a 28-65mm zoom lens on a full frame camera. In this case it would also be considered a Standard Zoom Lens. Canon also makes an EF-S 10-22mm f/3.5-4.5 lens that is considered an Ultra-Wide zoom lens on APS-C cameras.