Dew Zapper Dew Heater Straps

New product

Choose The Right Strap Length From Drop Down Option

Heater Straps Need A "Heater Controller" To Operate.

More details

Delivery In 1-5 Days*

£ 25.95 Tax included

1-5 Days UK Delivery*

Data sheet

Is this product normally on display at Grovers? Yes - But Check First If Making A Special Journey!

More info

If you point a telescope or any lens at the night sky, condensation usually forms on the lens within half an hour or so. This is caused by rapid cool down of the lens to below ambient temperature.

Why do telescopes dew up so easily? The universe has a rather low background temperature (which has dropped considerably since the Big Bang), and the more angular surface you expose to it (such as a telescope objectve lens) the more heat is lost through radiation. As a result, a telescope lens can easily drop to below ambient air temperature, especially when clear. That causes condensation or even frost to form on the lens which impairs the view somewhat. We're told the sky "temperature" (if it could be said to have one), can be equivalent to minus 40C or less, when ambient air temperatures are taken into account. Not only telescopes suffer. We recommend wearing a large woollen hat (of preferably silly design) to combat these conditions.

  • Stops condensation, moisture, fogging and dew forming on telescope eyepieces, microscope eyepieces, camera lenses, CCTV systems.
  • Very effiencient with low power consumption. (Power consumption & heat output are determined by 12v controller power setting).
  • High quality silicon cable with rubber outer sheath, glued to RCA jack for strain relief, remaining flexible at below zero temperatures, and moisture resistant.
  • High-quality long lasting Nichrome wire heating element embedded in a fused flexible silicon substrate for moisture resistance and reliability. (NO "thin-film resistors" or "foil elements" are used!)
  • Produces max 11 Watts, 0.9A at 12v 100% duty cycle. High-quality Male RCA plug fits most Dew Controllers with a 12v output (never exceed 12v).

Dew heaters consist of a strip or band, which wraps around the front of the telescope, and plugs into the dew controller, gently warming your telescope optics to keep them free of condensation, which forms very quickly at night.

2" OUTER DIAMETER (OD)

DewZapper 2" OD Dew Heater Tape for Telescope Eyepiece Finder Scope Microscope (28cm length, 4W)

  • Fits Telescope, Microscope Eyepieces, DSLR lens or Finder Scope optical tubes with 2-3" (50-75mm) OD. Total length 280mm, width 30mm.
  • Stops condensation, moisture, fogging and dew forming on telescope eyepieces, microscope eyepieces, camera lenses, CCTV systems.
  • Very effiencient with low power consumption. (Power consumption & heat output are determined by 12v controller power setting).
  • High quality silicon cable with rubber outer sheath, glued to RCA jack for strain relief, remaining flexible at below zero temperatures, and moisture resistant.
  • High-quality long lasting Nichrome wire heating element embedded in a fused flexible silicon substrate for moisture resistance and reliability. (NO "thin-film resistors" or "foil elements" are used!)
  • Produces max 4 Watts, 0.3A at 12v 100% duty cycle. High-quality Male RCA plug fits most Dew Controllers with a 12v output (never exceed 12v).

3 - 4" OD

DewZapper 3-4" OD Dew Heater for Telescope, Finder Scope (52cm length, 11W)

  • Fits Telescope, Spotting Scope or Finder Scope optical tubes approx. 3-6" (75-130mm) OD. Total Length 52cm, width 40mm.
  • Stops condensation, moisture, fogging and dew forming on telescope eyepieces, microscope eyepieces, camera lenses, CCTV systems.
  • Very effiencient with low power consumption. (Power consumption & heat output are determined by 12v controller power setting).
  • High quality silicon cable with rubber outer sheath, glued to RCA jack for strain relief, remaining flexible at below zero temperatures, and moisture resistant.
  • High-quality long lasting Nichrome wire heating element embedded in a fused flexible silicon substrate for moisture resistance and reliability. (NO "thin-film resistors" or "foil elements" are used!)
  • Produces max 11 Watts, 0.9A at 12v 100% duty cycle. High-quality Male RCA plug fits most Dew Controllers with a 12v output (never exceed 12v).

3 - 4.5" OD

DewZapper 3-4.5" OD HIGH POWER Dew Heater for Large Telescope Eyepiece, Spotting Scope, DSLR or Movie Camera Lens - but not the whole camera. You may want a longer strap that covers more of the camera! (40cm length, 20W)

  • Fits Telescope, Spotting Scope or Finder Scope optical tubes approx. 3-4.5" (75-115mm) OD. Total Length 40cm, width 40mm.
  • Stops condensation, moisture, fogging and dew forming on telescope eyepieces, microscope eyepieces, camera lenses, CCTV systems.
  • Very effiencient with low power consumption. (Power consumption & heat output are determined by 12v controller power setting).
  • High quality silicon cable with rubber outer sheath, glued to RCA jack for strain relief, remaining flexible at below zero temperatures, and moisture resistant.
  • High-quality long lasting Nichrome wire heating element embedded in a fused flexible silicon substrate for moisture resistance and reliability. (NO "thin-film resistors" or "foil elements" are used!)
  • Produces max 20 Watts, 1.7A at 12v 100% duty cycle. High-quality Male RCA plug fits most Dew Controllers with a 12v output (never exceed 12v).

7 - 8" OD

DewZapper Dew Heater for 7-8" Telescope inc. Celestron Nexstar 8, Evolution, Meade 8, Skywatcher 180 Mak (87cm length, 20W)

  • Fits Celestron Nexstar 8, CPC 8, Meade LX series 8" SCT, Skywatcher 180 Maksutov or any telescope with 7-9" outer tube tube dia. Total Length 870mm, width 40mm.Stops condensation, moisture, fogging and dew forming on telescope eyepieces, microscope eyepieces, camera lenses, CCTV systems.
  • Very efficient with low power consumption. (Power consumption & heat output are determined by 12v controller power setting).
  • High quality silicon cable with rubber outer sheath, glued to RCA jack for strain relief, remaining flexible at below zero temperatures, and moisture resistant.
  • High-quality long lasting Nichrome wire heating element embedded in a fused flexible silicon substrate for moisture resistance and reliability. (NO "thin-film resistors" or "foil elements" are used!)
  • Produces max 20 Watts, 1.7A at 12v 100% duty cycle. High-quality Male RCA plug fits most Dew Controllers with a 12v output (never exceed 12v).

9 - 10" OD

DewZapper Dew Heater for 9-10" Telescope inc. Celestron Nextar / C9.25, Evolution, Meade 10" LX Series SCT (102cm length, 28W 

DewZapper dew heater technical specs:
  • Fits Celestron C9.25 Series SCT, Meade LX series 10" SCT or any telescope with 9-10" outer tube tube dia.
  • Total Length 1020mm, width 40mm. Stops condensation, moisture, fogging on large telescope lenses or optics.
  • Efficient with low power consumption. (Power consumption & heat output are determined by 12v controller power setting).
  • High quality silicon cable with rubber outer sheath, glued to RCA jack for strain relief, remaining flexible at below zero temperatures, and moisture resistant.
  • Includes neoprene insulator on the back of the heater to direct heat inwards to the optics for better efficiency.
    High-quality long lasting Nichrome wire heating element embedded in a fused flexible silicon substrate for moisture resistance and reliability. (NO "thin-film resistors" or "foil elements" are used!)
  • Produces max 28 Watts, drawing 2.3A at 12v 100% duty cycle. High-quality Male RCA plug fits most Dew Controllers with a 12v output (never exceed 12v).
Path: > > > > Dew Zapper Dew Heater Straps

Accessories

14 other products in the same category: