Though generally halo effect is not considered good in normal photography, however, occasionally, it can be used through deliberate back lighting and its availability in nature or surroundings of the subject.
When halo is caused by diffraction light or bending of light around sharp edges or hairy periphery of the subject due to back lighting, it can produce better pictures. Also, at times Polaroid filters are used externally in front of the camera to produce deliberate halo effect.
When attached camera lens and rotated rightly, a polarizing filter cuts out most of the reflected light to enhance photographs through color saturation and contrast.
In optics,halos are the bright circles that surround a source of light. Halos occur during dark or semi dark conditions while glares occurs in normal light conditions.
A halo bright line can also appear in areas of high contrast on a photo when the photo has been subjected to very heavy HRD editing. Halo effect can also be created through external Polaroid sheet or filters.
If is created due digital editing or heavy HRD edit, depending on the nature of the subject, halo can enhance selectively the beauty of the subject.
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