AstroSystems amazing Dew Guard secondary mirror heating system automatically senses the air temperature and the mirror temperature, then maintains the secondary at a preset (adjustable) temperature above the ambient air temperature. Gently warms the secondary at 2-4 watts when on full. The DG-2 has 6 evenly spaced contact points for optimal thermal distribution. Uses any external 9-15 volt dc supply or you can run on a 9v battery mounted at the holder, eliminating the need for wires across the spider. Note: 9V rechargeable NiCd or NiMH batteries will not work, they are only 7.2-8.4V and have low capacity, rechargeable Lithium cells are 9V and will function properly. No more heat ropes! Three sizes to choose from.

The DG-2 is suitable for small secondary mirrors with a Minor Axis of 2.5 to 3.1 inches

Note:  AstroSystems Dew Guard is designed to work with AstroSystems Newtonian Secondary Mirror Holders. If your secondary is glued to a centre post, the Dew Guard cannot be used. If your secondary is exposed and not inside a shroud the Dew Guard will not be effective in controlling dew.

An Optional Dew Guard installation kit contains all the hardware to wire the Dew Guard across the spider and connect to a remote switched battery box.

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AstroSystems DG-2 Dew Guard Secondary Mirror Heater

SKU: AS-DG-2

$55.00

1 in stock

✅ Expert Advice
✅ Australian Owned
✅ Lifetime Technical Support

    Need Expert Advice?

    Visual Astronomy, Astrophotography, Microscopy and Macro Photography can be a little complicated sometimes as there are a lot of options. If you'd like to check something before you purchase just let us know and we'd be happy to help!

    Enquire now or call us (03) 9042 2293

    AstroSystems DG-2 Dew Guard Secondary Mirror Heater

    SKU: AS-DG-2

    $55.00

    1 in stock

    AstroSystems amazing Dew Guard secondary mirror heating system automatically senses the air temperature and the mirror temperature, then maintains the secondary at a preset (adjustable) temperature above the ambient air temperature. Gently warms the secondary at 2-4 watts when on full. The DG-2 has 6 evenly spaced contact points for optimal thermal distribution. Uses any external 9-15 volt dc supply or you can run on a 9v battery mounted at the holder, eliminating the need for wires across the spider. Note: 9V rechargeable NiCd or NiMH batteries will not work, they are only 7.2-8.4V and have low capacity, rechargeable Lithium cells are 9V and will function properly. No more heat ropes! Three sizes to choose from.

    The DG-2 is suitable for small secondary mirrors with a Minor Axis of 2.5 to 3.1 inches

    Note:  AstroSystems Dew Guard is designed to work with AstroSystems Newtonian Secondary Mirror Holders. If your secondary is glued to a centre post, the Dew Guard cannot be used. If your secondary is exposed and not inside a shroud the Dew Guard will not be effective in controlling dew.

    An Optional Dew Guard installation kit contains all the hardware to wire the Dew Guard across the spider and connect to a remote switched battery box.

    Reviews

    There are no reviews yet.

    Be the first to review “AstroSystems DG-2 Dew Guard Secondary Mirror Heater”

    Your email address will not be published. Required fields are marked *

      Need Expert Advice?

      Visual Astronomy, Astrophotography, Microscopy and Macro Photography can be a little complicated sometimes as there are a lot of options. If you'd like to check something before you purchase just let us know and we'd be happy to help!

      Enquire now or call us (03) 9042 2293