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Home Accessories Dew Prevention Dew Controllers and Bands Altair DewZapper High Power DSLR Lens Dew Heater 40cm 20W
DewZapper high power 20w Dew Heater for Large Telescope Eyepieces, Spotting Scopes, DSLR or Movie Camera Lenses (40cm length, 20W) - perfect where lenses have smaller or no physical dew shield and require maximum protection. You can of course use this band on any optic and simply regulate the heat to lower normal levels with your dew controller.DewZapper dew heaters are the high quality solution, with a geniune Nichrome wire heating element embedded in a silicon rubber subtrate, for durability and moisture-resistance. The 22 awg silicon coated wires have a synthetic rubber outer sheath, which remains flexible even in very low temperatures reducing "cable pull" related tracking errors. The RCA power jacks are bonded with flexible glue and a heatshrink tube for strain relief. A high quality Velcro pad sewn onto an elasticated strap is included for easy fitment. An internal neoprene insulator directs heat into the optics so you won't waste any power. There is simply no comparison with heaters which use thin audio cables and thin-film or "foil" heating elements, which are crimped to the wires, creating a failure point. DewZapper dew heater specifications: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 1.2m 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. Dew controller requiredHigh-quality Male RCA plug fits most Dew Controllers with a 12v output (never exceed 12v).
Keeps lens warm Have used on my 600mm lens that doubles as a wide field scope. Also used on 50mm guide scope as it does not have an adequate dew shield. Works well in both applications. Good service from HT. (29/01/2024) DaveP - Chester
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