camera trick

John Larkin · 2012-05-16T21:46:26+00:00

These big old Tek 11801 scopes don't put screen snaps on memory sticksor anything fancy like that, so I photograph the screen for manuals.To get a nice flat field, you have to back off some and zoom, and thenyou need a tripod to hold the camera steady. Light level is low, sothe camera takes a long exposure. When you push the button, thatjiggles the camera. The delayed exposure thing takes too long.Here's the trick, which works with my camera: deliberately shake thecamera as you push the exposure button, and step back. The camera'santi-shake logic will wait until it thinks it's steady, then shoot.This seems to make sharper pix than any other way.Zoom up on this one:I post-process with Irfanview.-- John Larkin Highland Technology, Incjlarkin at highlandtechnology dot comPrecision electronic instrumentationPicosecond-resolution Digital Delay and Pulse generatorsCustom laser drivers and controllersPhotonics and fiberoptic TTL data linksVME thermocouple, LVDT, synchro acquisition and simulation

May 16, 2012 64 Replies

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Nico Coesel 14 years ago

I guess it greatly depends on the image format. From the limited choice I selected BMP because that is compatible with about everything. IIRC the scope can also export as TIF but I did not check if that is much smaller. HPGL would be much smaller but most software messes that up badly.

Failure does not prove something is impossible, failure simply indicates you are not using the right tools... nico@nctdevpuntnl (punt=.) --------------------------------------------------------------

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Joerg 14 years ago

TIF is not very standard but PNG is nice. It can render a clean scope plot in less than 10k.

HPGL used to be the best once you had circumvented its quirks such as missing "pen down" commands. During my first years of consulting in the early 90's I used HPGL almost exclusively for writing reports and module specs. HP printers could print a pristine plot and MS-Word for DOS imported it so well that clients sometimes asked me how expensive my deskptop publishing software was. My what?

But then MS blew it, support for HPGL has gone out the window. Meaning now I have to immediately convert to PNG or something similar.

Regards, Joerg http://www.analogconsultants.com/

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Sjouke Burry 14 years ago

snipped-for-privacy@puntnl.niks (Nico Coesel) wrote in news: snipped-for-privacy@news.kpn.nl:

Thanks, I snagged them all! :)

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Jasen Betts 14 years ago

formatting link

?? 100% natural --- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net

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Fred Abse 14 years ago

Doesn't your camera have a remote?

Mine does, a sort of "infrared cable release"

Ancient, now, 2001 vintage.

"For a successful technology, reality must take precedence over public relations, for nature cannot be fooled." (Richard Feynman)

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