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Registered Member #10
Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
Yep. It's the LED shining through a 180mm camera lens which projects a very clear image onto the corrugated shed wall. You can see great detail with the 30 times magnification including the bonding wires and chip details. It so happens that the chip light is in a "3" shape brought out with contrast adjustment. One of the individual LEDs is marginally brighter or in better focus and stands out unusually. More details on the "Mother of all LED's" thread.
Registered Member #10
Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
lhl_henrylui wrote ...
The sky in the night taken by long exposure?
Reasons for: I've done it before with a big lens. Reasons against: it just doesn't look like Hubble Deep Field. This amount of exposure would leave star trails unless I have a proper tracking mount.
Harry wrote ...
Raindrops or dew on a window-screen?
Reasons for: they are spots against a background. Reasons against: dew forms uniformly on a screen as a mist obscuring vision then coalesces and with rain it seems too non uniform (perhaps).
No screen is involved.
Anyone else?
Edit: Oops this post crossed Dr Kilovolts
Dr. Kilovolt wrote ...
To me it looks like raindrops in the night, illuminated by something bright from behind the camera...
Correct. That bright light is called a camera flash..... It is only our persistence of vision and our understanding of the trajectory that makes us "see" rain as streaks. Freeze it with a flash and you just get to see dots. More interesting info and the original photo when I get home. Yes that is a tree silhouette on the left side.
Edit again. The original photo of my back yard with the city lights giving a glow in the sky. Interestingly, not all or the raindrops are white. Some are red yellow orange green or blue and on one occasion I got a tiny full spectrum. I presume that these are due to prismatic effects due to distorted or colliding drops. The blobs are just out of focus drops.
Registered Member #2028
Joined: Mon Mar 16 2009, 08:13PM
Location: Norway
Posts: 319
It is only our persistence of vision and our understanding of the trajectory that makes us "see" rain as streaks. Freeze it with a flash and you just get to see dots.
Have you ever seen night rain lit by a powerful strobe lamp? It looks awesome, like the rain has stopped.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Tesladownunder wrote ... Interestingly, not all or the raindrops are white. Some are red yellow orange green or blue and on one occasion I got a tiny full spectrum. I presume that these are due to prismatic effects due to distorted or colliding drops. The blobs are just out of focus drops.
Was that a 100% crop? The colors might be because of the CCD, if it sees a single pixel it cannot know which color it is as CCD pixels are only either red, green or blue.
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Mystery Photos from TDU
