iOptron’s PowerWeightTM rechargeable counterweight battery pack is designed for using with various iOptron mounts. It can be fitted onto a mount which has a counterweight (CW) shaft with a diameter of 20mm or 28mm. Use this battery pack in place of your traditional CW, or as an additional CW, and avoid long extension cords.
SvBony SV172 Dew Heater for Telescopes and Camera Lens, 400mm
Designed for astronomy telescopes and cameras, protecting optical devices like telescopes and cameras from fogging or freezing
Prevents dew condensation from forming on the glass surface
Provides even heat distribution. Power-efficient design will not result in an extra drain on your power supply.
Three-speed regulator strong-medium-weak heating modes, you can adjust the temperature in different situations
Width of the 50mm narrow width design, will not block your field of view and will not have dark corners in the field
Great heat preservation effect: Imitating OK cloth, SBR and Black-T three-layer keep warm material fits the lens better, fast and even heating
Alloy fiber heating wire provides super fast and continuous warming, silicone insulation process can prevent internal short circuit
Measure the circumference of the telescope tube or camera lens (or measure the tube diameter - not the scope aperture - ×3.14). Compatible with OD of telescopes/lenses below 127mm