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Camera Frame, view angle and focal length

What is camera frame?

Camera frame indicates the sensor size of the the camera.

36 x 24 mm sensor: full Frame (most expensive)

24 x 16 mm sensor: called APS-C, or DX frame (by Nikon)

The larger the frame is, the wider the camera can capture in a photo.


camerqa frame size, sensor size

The relation between frame size and focal length:

focal length and view angle.


focal length and view angle

Full frame is suitable for shooting landscapes. Here is why.


A 85mm (fixed) lens on a full frame camera, its equivalent focal length is 85mm


A 85mm (fixed) lens on a 24 x 16 mm APS-C (DX)frame, its equivalent focal length is 85mm X 1.6mm = 136mm (85mm X 1.5mm = 127mm


And a 16mm wide angle lens, if on a APS-C (DX)frame, its equivalent focal

length is 26mm (24mm). 16mm lens view angle is 98 degree, while 26mm (24mm) lens view angle 80 degree (84 degree).


To be updated.

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