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<blockquote data-quote="Bob Blaylock" data-source="post: 337030" data-attributes="member: 16749">Here's my entry—not as big a stretch as I thought I'd have to make.&nbsp; I was thinking I might use my car's engine, or an arrangement of a gun and ammunition—things that use fire to operate, but where the fire isn't really apparent.&nbsp; Then I thought of this butane-powered soldering iron.&nbsp; Though there is no open flame, the orange glow is from the combustive reaction of butane and oxygen, to produce heat—fire in the technical sense, if not in quite the form in which we think of fire.&nbsp; I was hoping to catch drops or splashes of melted solder, as I have sometimes done with water.&nbsp; No such luck.&nbsp; But I did get some interesting patterns of smoke, sufficient to make a worthwhile image.&nbsp; I was startled, in postprocessing this image, to realize that at some points, the smoke is sharply-enough resolved that I can see individual smoke particles—not something that I think I've ever seen before in any context.&nbsp; There's even a bit of a rainbow in that portion of the smoke.&nbsp; You can't see that in the whole image, shrunk down to the size that this forum shrinks it to, but I've included a detail portion afterward, and have put <a href="https://flic.kr/p/ougZD4" target="_blank">the full-sized image on Flickr</a>.&nbsp; Whole image (This one is my entry.):[ATTACH]103585[/ATTACH]&nbsp; Fine detail of smoke (This image is not, itself my entry, but just here to show some fine detail that you otherwise won't be able to see in the main entry.):[ATTACH]103587[/ATTACH]</blockquote>

[QUOTE="Bob Blaylock, post: 337030, member: 16749"] Here's my entry—not as big a stretch as I thought I'd have to make. I was thinking I might use my car's engine, or an arrangement of a gun and ammunition—things that use fire to operate, but where the fire isn't really apparent. Then I thought of this butane-powered soldering iron. Though there is no open flame, the orange glow is from the combustive reaction of butane and oxygen, to produce heat—fire in the technical sense, if not in quite the form in which we think of fire. I was hoping to catch drops or splashes of melted solder, as I have sometimes done with water. No such luck. But I did get some interesting patterns of smoke, sufficient to make a worthwhile image. I was startled, in postprocessing this image, to realize that at some points, the smoke is sharply-enough resolved that I can see individual smoke particles—not something that I think I've ever seen before in any context. There's even a bit of a rainbow in that portion of the smoke. You can't see that in the whole image, shrunk down to the size that this forum shrinks it to, but I've included a detail portion afterward, and have put [URL="https://flic.kr/p/ougZD4"]the full-sized image on Flickr[/URL]. Whole image (This one is my entry.): [ATTACH=CONFIG]103585._xfImport[/ATTACH] Fine detail of smoke (This image is not, itself my entry, but just here to show some fine detail that you otherwise won't be able to see in the main entry.): [ATTACH=CONFIG]103587._xfImport[/ATTACH] [/QUOTE]

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