How do you manage the problem of lens fogging or condensation?

How do you manage the problem of lens fogging or condensation?

Fogging, lens condensation, or dewing is a well-known problem in astronomy, too often responsible for interrupting observations. To handle this problem, STELLINA incorporates a heating resistance system (dew heater) that activates automatically to ensure you always have a dry optic system!
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    • Will Vespera incorporate a heating resistance system?

      Unlike Stellina, Vespera will not incorporate an anti-fog heating resistor. This will be offered as an accessory. 
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    • What are Vespera's full specs?

      Weight 5 kg (11lbs) Height 40cm (15 in) Width 20 cm (8 in) Depth 9 cm (3.5 in) Battery life 4 hours Aperture 50 mm Focal length 200 mm Resolution 1920 x 1080 (2MP) Lens Apochromatic Quadruplet Lens special features Extra low dispersion S-FPL52 ...