Thank you! I notice that the Flickr page has had more views already than the shot of a helicopter's exhaust causing heat-ripples in front of a building (http://flickr.com/photos/29474483@N00/2684709204/)[1], so I know somebody's been pointing other people to it.
[1] That one is also in the high-magnification category because I used a telescope as a lens, but at a mile away the whole helicopter fits in the frame despite the magnification. ;-)
That's just too cool. I remember seeing a photo back when I was a Computer Jockey it was of exhause from a smokestack hitting 2 different thermals from 2 different directions ....
I've seen the plume from the Baltimore recycling plant bent nearly into a question mark by passing through a couple of wind-direction transitions; it's unusual enough to hold my attention (I usually see it pass through just two layers / one transition, or go in a single direction). It's an interesting effect. I've shot it on film, but haven't caught it on digital yet (and that roll of film hasn't been developed yet -- it's part of the 200+ roll backlog waiting for me to be able to afford processing).
Boy howdy do I hear you on the afford part. I need to get a new camera. I can't get batteries for my fTb any more. :-( Hearing aid batteries *work* but they're always on, and they slow trickle down, so you can't tell if the battery is no longer adequately functional till it's too late. And they're too dad-dang expensive to put a new one every time you want to take pictures!
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[1] That one is also in the high-magnification category because I used a telescope as a lens, but at a mile away the whole helicopter fits in the frame despite the magnification. ;-)
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*sigh*