Path: utzoo!attcan!uunet!mcsun!hp4nl!philapd!ssp18!michiel
From: michiel@idca.tds.PHILIPS.nl (Michiel Fierst van Wijnandsbergen)
Newsgroups: comp.misc
Subject: Re: photo of crt
Keywords: photo, crt
Message-ID: <986@ssp18.idca.tds.philips.nl>
Date: 22 Feb 90 14:50:51 GMT
References: <146@tslwat.UUCP>
Organization: Philips Information Systems, Apeldoorn, The Netherlands
Lines: 41

In article <146@tslwat.UUCP> louk@tslwat.UUCP (Lou Kates) writes:
>Does anyone have any experience in taking photos of what is on a CRT screen?
>What lighting, if any, should be used, what f stop, what shutter speed?  I
>am using a 35 mm camera.
>
>Lou Kates, Teleride Sage Limited, ...!watmath!looking!tslwat!louk
>519-725-0277

My original Follow-up failed I believe. Here it is again. Sorry
if I posted it twice now.



I did it a few times. Here's how:

	Put up your tripod to have the display full in your finder.

	Measure the time you need.

	Choose an exposure time/aperture that is 1 of 2 stops over
	what you measured (+1 or +2). I would take two pictures; one
	at +1 and one at +2. If your screen has bright text on a
	dark background that is. If your screen is reverse use
	-1 and -2 instead. If the image is full color or a normal
	tv set, don't correct the time at all.

	Make sure your exposure time is at least twice as long as the
	screen refreshing frequency. Usually this is 1/30 for 60Hz
	screens, or longer. The longer the the, then better it is
	up to a time of about 1 second. Don't use longer times.

Good luck.

-- 
#  Michiel Fierst van Wijnandsbergen   Internet fierst@idca.tds.philips.nl #
#  Philips Telecomm. and Data Systems  UUCP       ...!mcvax!philapd!fierst #


-- 
#  Michiel Fierst van Wijnandsbergen   Internet fierst@idca.tds.philips.nl #
#  Philips Telecomm. and Data Systems  UUCP       ...!mcvax!philapd!fierst #