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Re: [OM] circuit to measure shutter speed

Subject: Re: [OM] circuit to measure shutter speed
From: "Tom Trottier" <TomATrottier@xxxxxxxx>
Date: Fri, 18 Feb 2000 14:28:17 -0500
Hey, the simplest way, at least for speeds faster than 1/60 is to 
take a picture of your TV screen. NTSC (US, Canada, Japan) has 525 
lines every 30th of a second, so each line is 
6.34920634920634920634920634920635e-5 seconds. Just count the lines. 
1/1000 should be 15.75 lines, 1/250 63 lines

You could also use your computer monitor using its refresh rate & 
resolution.

Tom
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