FZ8: Heat waves!
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| Forum | Panasonic Talk |
| Subject | FZ8: Heat waves! [SIMILAR] |
| Posted by | Entropius [PROFILE] |
| Date/Time | 18:57:25, 17 June 2007 (GMT) |
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So, I vaguely remember a conversation about noise and noise reduction a while back (I don't remember about what camera, if it was a Panasonic or the H9 or what), that went like:
SOME DUDE: That's really horrible watercoloring! What a sucky sensor!
SOME OTHER DUDE: No it's not! It's, uh, heat waves!
FIRST DUDE: Riiiiight.
It can happen. :)
420mm equivalent, f/5.6, ISO 100, 1/320 second, ~60% crop
Taken in Huntsville, AL, a few days ago.
http://i19.photobucket.com/albums/b167/entropius/heatwaves.jpg
For those who don't know: warm air and cold air have different indices of refraction. Light going from one to the other will bend, just like light going from air to glass in a lens.
If you have warm air and cold air all mixed up, like when the wind blows over the hot ground railroad tracks (or, worse, the cars leave turbulent air behind them), you get random lensing of the light.
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