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Re: [APML] FL change with temperature

To: Discussion of Film Astrophotography <astro-photo@seds.org>
Subject: Re: [APML] FL change with temperature
From: Matt BenDaniel <matt@starmatt.com>
Date: Tue, 18 Mar 2003 22:28:24 -0500
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A dew heater only needs to heat the lens a degree or two warmer than the ambient temperature. If it does more than that, it's being over-used.

At 15:24 18-03-03 -0800, westergren wrote:
>Dale, your question about dew heaters raises a good point.  If the lens FL changes with temperature, then it will be affected by dew heaters.

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

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References:
- [APML] FL change with temperature
  - From: "westergren" <westergren@netzero.net>
- Re: [APML] FL change with temperature
  - From: "westergren" <westergren@netzero.net>

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