12869Re: Zenithstar ll 80mm ED APO
- Jan 1, 2007Technically, you should leave the dust cap off until the optics reach ambient temperature.
--- In William-Optics@yahoogroups.com, "w.stanley07" <w.stanley07@...> wrote:
> I would appreciate advice on lens cap. After using my telescope in
> cold weather , when I return home should I leave the lens cap on or off
> as it warms up with indoor air ? Thanks and Happy New Year with lots
> of clear skies.
> Toronto, Canada
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