[NLRS] Another thought about light QSO's

[aflowers at frontiernet.net]

Back when I was actively working with small IR lasers and cloudbounce I used my (cheap) digital camera to view the 784nm beam.  To adjust the divergence of the beam, I made a big black set of circles on a piece of paper at the other end of the the hall and illuminated it with the laser. 

Old VHS video cameras work well too.  You can usually run baseband video back to a monitor with those.

Andy K0SM/2



----- Original Message -----
From: "Brent Casavant" <b.j.casavant at ieee.org>
To: "Zack Widup" <w9sz.zack at gmail.com>
Cc: "NLRS List" <nlrs at mailman.qth.net>
Sent: Thursday, December 10, 2009 2:45:52 PM GMT -05:00 US/Canada Eastern
Subject: Re: [NLRS] Another thought about light QSO's



On Thu, 10 Dec 2009, Zack Widup wrote:

> My Nikon D-70S is not sensitive to infrared light. I don't see anything from
> a remote on it.
> 
> Maybe this only works with cheap cameras?

That's not far from the truth.  DSLR sensors have infrared filters
on them, and I imagine many other cameras do as well.  In fact,
there's a whole group of people who do infrared photography who
send their cameras in for modification to remove the IR filters.

A quick Google image search for "infrared photography" will turn
up some really beautiful but surreal photographs.

Brent

-- 
Brent Casavant				If you had nothing to fear,
www.angeltread.org			how then could you be brave?
KD5EMB, EN34lv				  -- Queen Dama, Source Wars
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