Each country has its own flag. Each of these in a big list of world flags is technically the same in the sense that they should be rendered respect and reverence. Even drawing them or taking pictures of them should be done with good meaning and intentions. In order to get the best photos for your flags, here are some tips.
Present the photos of world flags as natural as possible. While it may be possible to set the flag against a set up background, the natural term pertains to the lack of alteration of photos afterwards. Some would define the terms as unfiltered. Since unfiltered photos may have blemishes and inconsistencies in the background such as minor imbalances, it would be best to leave it be and instead focus on the flag as a central focus.
Allow the world flag to unfurl. Nobody wants to have their picture in an unready pose, nor have their facial expression in the most unworldly instance. Much like world flags warranting respect and good image, it would be unjust to have a picture of a nation’s flag lazily drooping at the side of a flag pole. Have a good gust of wind pick up the flag and unfurl it in a majestic manner.
Experiment with the lighting. Common photography concepts would indicate that the light should be behind the camera and onto the focus. However, a world flag may make good use of an experiment wherein the light would be placed behind the flag, making a glowing effect and through the fabric. This might make some good shots and some interesting outputs.