SVBONY SV192 12V Dew Heater Strip Heater Warmer for Telescope/DSLR Camera Lens Outer Diameter below 7.01in /178mm

Features Designed specifically for astronomical telescopes protect optical equipment such as telescopes from fogging or freezing Compatible with astronomical primary mirrors of OD below 178mm or Camera Lenses 5 5X2 1 female interface design easy connected to various 12V power inputsThree speed regulator with medium weak heating mode You can adjust the temperature according to different usage requirements Super fast continuous heating quick start heating The narrow width of 50mm will not interfere with focusing and will not produce vignetting in the field of view the width also reduces the interference of other accessories on the lens barrelGood heat preservation effect imitating OK cloth SBR and Black T three layer heat preservation material reducing heat dissipation and no wrinkles on the inner surface after bending It is more suitable for the lens barrel and increases the warmth retention effectUniform heating the built in aluminum film has a uniform heating surface and no dead ends TPE Silica of material the power cord low temperature non become hardSafe use and prevent short circuit Alloy fiber heating wire can provide super fast continuous heating The silicone insulation process prevents internal short circuits Specification 1 Brand SVBONY2 Model SV1923 Dew heating belt size 560 50mm4 Dew heater strip length approx 720mm5 Interface type 5 5 2 16 Input voltage 12V7 Input current 1 7A±0 1A8 Power 19 2W 21 6W9 Adjustable temperature yes10