Hey Ahmet,
The reason why the photo is cropped is because we fix the width / height of the photo so that it appears as square. To fit all images in the same size would be impossible as this would only result into non proportionate image.
To change this behavior, you can add the following block of css codes into your template's css,
This will ensure that the exact image is shown as is but do take note that because of that, it would be more difficult to view the image since it would be smaller.