Cropping an image needs to be done when the size of the required print is different to the aspect ratio that the picture was created in. The Canon cameras I use have an aspect ratio of 3:2, so that means photos can be printed at 6x4, 7.5x5, 9x6, 12x8, 15x10, 18x12, 24x16 and 30x20 (all inches) without and cropping applied. An example shot is shown here.
The image is taken directly from the camera, so the longest side is 3 units long and the shortest is 2 units long. This equates to a print at the sizes mentioned above, either 6x4, 7.5x5, 9x6, 12x8, 15x10, 18x12, 24x16 or 30x20.
If you wanted this picture in a different size, lets say 10x 8, that equals an aspect ration of 5:4, different from the original of 3:2, so some cropping will take place. The picture on the right is the same shot, but with the new crop applied.
You can see with this crop applied that the height has remained the same, but the left and right hand edges have been pulled in, losing some detail. Compare it with the picture above which has the original aspect ratio.
This photo has plent of 'dead space' around it, so it takes the crop quite well, but some shots such as group pictures at weddings may not lend themselves well to being cropped as some members of the group might be chopped out.
Finally, here's the same image again, but this time with a square 1:1 aspect ratio applied. See how different it looks?
If you want to have a print which is other than 6x4, 7.5x5, 9x6, 12x8, 15x10, 18x12, 24x16 or 30x20 please let me know before you place your order and I'll add a version to your private gallery so you can see the effect before you confirm you want it. I'd rather you saw the image on screen before buying the print and not being happy with the result.
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