I am new to dslr photography (christmas) and have been reading a lot today. I have a question that I didn't see answered anywhere.
If you have a subject at a given distance and you change the f-stop you are changing the size of the aperture. But if you make the aperture bigger aren't you letting light enter the camera and hit an area that is larger than the sensor? And vice versa, if you make the aperture smaller then you may be shading part of the sensor? I know there must be something wrong with this thought experiment because when I make the aperture small and look through the viewfinder or at pics I took they all seem to be full size. What am I missing?
Is the camera adjusting the focal length based on the aperture size so that it always lets the light fall on the sensor correctly?
If you have a subject at a given distance and you change the f-stop you are changing the size of the aperture. But if you make the aperture bigger aren't you letting light enter the camera and hit an area that is larger than the sensor? And vice versa, if you make the aperture smaller then you may be shading part of the sensor? I know there must be something wrong with this thought experiment because when I make the aperture small and look through the viewfinder or at pics I took they all seem to be full size. What am I missing?
Is the camera adjusting the focal length based on the aperture size so that it always lets the light fall on the sensor correctly?