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Re: [OM] Why you should never point your 250/2.0 into the sun

Subject: Re: [OM] Why you should never point your 250/2.0 into the sun
From: Dawid Loubser <dawidl@xxxxxxxxxxx>
Date: Thu, 24 Dec 2009 13:59:59 +0200
On 24 Dec 2009, at 4:28 AM, Chuck Norcutt wrote:

<snip>
> Telescopes eyepieces with elements
> tightly constrained within metal cells may explode with some vigor due
> to thermal expansion.
<snip>

Awesome! err.... I think...?
-- 
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