Lens cover on or off?

19 years 6 months ago #7975 by Seanie_Morris
Replied by Seanie_Morris on topic Re: Lens cover on or off?

Still though, it's hard to avoid getting condensation after stuff has been outside for a while - any more options?

If your scope allows, a small fan is never any harm. A low rpm fan just blowing air accross the objective lens or objective mirror, helps keep it a stable temperature. This limits the amount of expansion, keeps ita constant temperature, and prevents dew/condensation from settling on the surface.

Just that in winter, have a few spare batteries handy - they tend to die quicker, especially rechargeables, in extreme cold.


Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.

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