by
jlwilm » Thu Apr 09, 2009 7:13 pm
Suzi,
Not exactly. You can crop any image to any aspect ratio.
Your DSLR shoots in a 2:3 ratio.
If you crop nothing - i.e. the original image straight out of the camera it is 2:3 and will print perfectly on a sheet of 4x6 paper.
Now, if you wanted to crop tour DSLR images to a 4:3 aspect ratio to fit completely and undistorted on yout "old style" monitor or TV (4/3=1.33333etc) then set your width to 10.24 inches and your height to 7.68 (10.24/7.68=1.33333etc) and it will fit perfectly.
So, any image can be cropped to any aspect ratio. In so doing, you usually wind up loosing a small fringe area of your original image, but the crop works and the resultimk image will "fit" wherever you want it to.
I was once preparing a DVD show for a HD tv and didn't know what its resolution was. Simple solution, brought my tape rule, measured the width and height (42/24=1.75) which is pretty close to the 16:9 aspect ratio result of 16/9=1.7777
It may sound complicated, but you are fitting a thing into a hole and it just has to be the same shape (aspect ratio) and you can stretch it out and make it fit perfectly.