NEEWER Usb-lensverwarming, 500 mm lensverwarmer voor DSLR-camera en telescoop, 3 temperatuurinstellingen, verwarmingsstrip voorkomt dauw, mist en condensatie, voor astrofotografie met telescopische

Muy buen producto, ideal para tubos pequeños y teleobjetivos

I have had other lens warmers and the quality was not there. This one is solid, good quality product.

Seems like a well-made heater and does get good and warm based on human body temperature.Temperature Control: Single tactile mini PCB button cycles through 3 LED-lit heat levels.Temperature Feedback: Includes a NTC thermistor which may be used in control algorithm, or just for a high-temperature cutoff. (Don't know.)There is a 14-pin integrated circuit on an SMT circuit board.Good quality manufacturing techniques using surface-mounted components.Electrical Input: 5 V, 2 A = 10 W nominal.Actual measured voltage: 4.7 VMade in China.Note: Does not maintain previous setting after power interruption. This may cause issues depending on application.The maximum diameter with a full heating circumference is 7" diameter. This won't fit around my entire humoungous head, but it can be extended and fastened over 8" in diameter, leaving a gap between the end of the heating elements. This can be connected to a full-sized USB connector. Could be connected to an electromagnetic receiver or transmitter, to send or receive signals through brainwaves. Possibly entertainment value when combined with binaural beats. Please Note: this is not a recommended use for this product. Please only use it for keeping camera lenses anti-dewed.

Have not used them but seem to work fine

Je n'ai rien à lui reprocher pour son prix et le faite que c'est une petite bande chauffante en 5 volts.Je l'utilise sur un lulu de 60mm de diamètre. A voir en hivers si elle est fait son job ou pas.