Originally posted by Droogie
reply to post by CHRLZ
If it's a flare I would like to know what this kind of flare is called for future reference, including some information regarding it.
I've also looked through OzWeathermans' thread of Atmospheric Phenomenen Identyifying-
List, and I couldn't find anything that's quite like this, although some examples might not show it very clearly.
I gotta go now, but I'll check in later.
Droogie, there are a *few* special types of flare that have names, but mostly.. no. Flare just means scattered light in an image, and it is applied
to just about everything from 'blooming', where a bright object (eg Sun) appears much larger than it is because of the 'spill' from overloaded
sensors (or the equally overloaded heat/light-induced chemical reactions in film grain), right through to diffraction spikes from point sources, to
the little rings and circles you get lining up across an image (usually the more elements in the lens, the more 'flares' - modern zoom lenses often
have 10-15 elements..).
To a photographer, it really refers to the haze you get (a loss of contrast), when shooting into the light, but it has become an all encompassing term
including just about everything that isn't in the real scene, including from windows or lucite/perspex covers on crappy little webcams...
And frankly, flares are inevitable. Every time you have an air-glass interface (eg 2 x for every lens element, front and back), you will get a
refraction (bending). The lens is designed to do that of course, but any *stray* light rays (and there are lots of sources of those) will produce an
Then, whenever there is a polished surface, there is also a reflection
, and those reflections don't just happen once - the light keeps
bouncing around... So, there are also all those additional reflections at the front and back of every lens element, also at the front and back of any
filters, windows or transparent covers AND on the surface of the sensor, then again on the surfaces of its filters, even on the microlenses in the
sensor itself... Plus, the curve or flatness of the reflective surface also comes into play, throwing light in all sorts of directions.
1. Flare is inevitable in any image involving a lens and a bright light source. Sometimes you may not be able to detect it, but trust me, it's
2. Better lenses have reduced amounts of flare (lens designers can take great pains to put on anti-reflective coatings, put matt coatings on any
exposed metal inside the lens barrel, etc..)
3. Zoom lenses normally have MORE elements that non-zoom and are more prone to flare.
4. Flare can manifest itself in many ways, from circles and rings to odd shapes and general loss of contrast.
5. Flares can appear from things outside the camera, eg transparent covers, windows..
6. Every glass-air surface will potentially produce a flare. recognising them is the trick.
7. If the images are moving (ie a movie), the flares will move/change in synchronisation with the motion of the camera relative to the light source.