For users of smartphones or small cameras mostly:
Reduce the contrast between the pipe and its background. Specifically, don't photograph a dark pipe on a white background. Nor a white or light pipe on a dark background. The reason is many cameras on auto exposure average out the light, so dark pipes get underexposed, and light ones on black get under exposed.
Have the light come mostly from behind the camera. Indirect natural lighting is best. Not direct sunlight nor flash if it can be avoided.
Some smartphones allow you to choose the focal point and it will also set—to some degree— the exposure to that area.
For experienced photographers none of the above need be said as there are countless ways to make adjustments. Please add any further comments below.
Reduce the contrast between the pipe and its background. Specifically, don't photograph a dark pipe on a white background. Nor a white or light pipe on a dark background. The reason is many cameras on auto exposure average out the light, so dark pipes get underexposed, and light ones on black get under exposed.
Have the light come mostly from behind the camera. Indirect natural lighting is best. Not direct sunlight nor flash if it can be avoided.
Some smartphones allow you to choose the focal point and it will also set—to some degree— the exposure to that area.
For experienced photographers none of the above need be said as there are countless ways to make adjustments. Please add any further comments below.