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Greg Lloyd
@Roundtrip@federate.social  ·  activity timestamp 3 days ago

#FotoVorschlag

Werkzeug >> Tool

Light pen, colorized photo
IBM 2250 vector CRT display
Hypertext Editing System (1969)
Brown University
Providence RI USA

#photography #hypertext #FilmPhotography

Bright green-for-white colorized black and white photo of a hand pointing a silver cylindrical light pen with a black tip at a word of glowing green text on a CRT screen.

IBM 2250 vector CRT display 
Hypertext Editing System (1969)
Brown University
Providence RI USA
Photo by Greg Lloyd 
Kodak Plus-X 35mm BW
Bright green-for-white colorized black and white photo of a hand pointing a silver cylindrical light pen with a black tip at a word of glowing green text on a CRT screen. IBM 2250 vector CRT display Hypertext Editing System (1969) Brown University Providence RI USA Photo by Greg Lloyd Kodak Plus-X 35mm BW
Bright green-for-white colorized black and white photo of a hand pointing a silver cylindrical light pen with a black tip at a word of glowing green text on a CRT screen. IBM 2250 vector CRT display Hypertext Editing System (1969) Brown University Providence RI USA Photo by Greg Lloyd Kodak Plus-X 35mm BW
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Rainer
@saxbass.bsky.social@bsky.brid.gy replied  ·  activity timestamp 3 days ago

Irre sowas nochmal zu sehen. Einen Lichtgriffel hatte ich selbst gebaut. Aus der Hülle eines Kugelschreibers, einer Fotodiode und Transistor. Der war an einen ZX81 angeschlossen. Über die Laufzeit vom Bildaufbausignal bis zum Erkennen des Lichtpunktes auf dem Monitor (Fernseher) wurde die Pos. calc

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