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Re: [OM] Star Trails

Subject: Re: [OM] Star Trails
From: Matt BenDaniel <matt@xxxxxxxxxxxx>
Date: Mon, 09 Jun 2003 04:54:29 -0400
At 15:54 06/08/2003 -0300, Fernando Gonzalez Gentile wrote:
>What I cannot figure out is how did you manage not to overexpose the
>foreground objects. 

At dark sites, the sky is brighter than the landscape.

>Maybe because they're red (why red_please), but I saw
>another picture in your site -8 hours exposure, must have been during
>winter- with common buildings in the foreground and they were not
>overexposed. 

Astronomers use dim red lights when they need to illuminate what they're 
working on. That has the minimum impact on imaging and human dark adaptation.

>I got a little overexposure on this situation, and remember to
>have +1 compensation only. Maybe I should have trusted the circuitry better.

I never use automatic exposure for star trails. It yields unpredictable results 
and drains camera batteries.

--
Matt BenDaniel
matt@xxxxxxxxxxxx
http://starmatt.com


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