SVBONY SV172 USB Dew Heater Strip for Telescopes and Lenses

Keep Your Optics Clear During Dewy Observing Sessions

The SVBONY SV172 dew heater strip gently warms compatible telescope tubes, eyepieces, spotting scopes, and camera lenses to help reduce moisture buildup during outdoor observing and imaging. Wrap the strip around the outside of the lens barrel, connect it to a suitable 5V USB power source, and choose the heat level that suits the conditions.

Key features

• Designed for telescopes and compatible camera lenses, eyepieces, and spotting scopes
• 5V USB Type-A input
• Adjustable heating levels
• Approximate power range: 7.25W to 10W, depending on the selected size and setting
• 1.8 m nylon power cable
• Narrow 50 mm heater width
• Available lengths: 240 mm, 320 mm, 400 mm, and 430 mm PWM

Choose the correct size

Measure the outside circumference of the optical tube or lens barrel before ordering. Select a strip long enough to wrap securely without obstructing controls, focus rings, or other accessories. The 430 mm PWM option is a separate variant - please confirm the selected option before checkout.

Power and safe use

Use only with a regulated 5V USB power source able to supply the required current. A power bank or USB power adapter is not confirmed as included. Keep electrical connections dry, do not use a damaged cable, and disconnect power before storing the strip. This heater is intended to reduce dew, not to dry equipment that is already wet.

FAQ

What does a dew heater do?
It adds gentle warmth around the outside of compatible optics to help reduce condensation during humid or cool conditions.

Which size should I choose?
Measure your tube or lens barrel circumference and select the size that fits securely while leaving controls accessible.

What power source is required?
The listed input is 5V through a USB Type-A connection. Check your power source can provide adequate current.

Is it suitable for DSLR lenses?
It is listed for compatible DSLR camera lenses as well as telescopes, eyepieces, and spotting scopes. Confirm the selected strip size fits your lens.