Kitpedia

Dew heater

Astronomy

A low-power heating strap that keeps dew off a lens or scope through the night.

Approx. cost
$20–$80
Weight
2–6 oz
Used in
1 kit

Purpose

Prevent condensation from fogging optics during long night sessions.

Used in kits

Alternatives

  • Lens hood— Delays dew a little; won’t stop it on a humid night.

Maintenance notes

  • Runs off a USB battery — budget its draw into your power plan.

Buying considerations

  • Match the strap length to your lens or scope diameter.
  • A controller lets you use just enough heat.

Page history & editing

Revision status: approved Last edited 2026-07-01 by human editor