NEEWER USB-lensverwarming, 300 mm lenswarmer met FPC snelle, gelijkmatige verwarmingstechnologie voor DSLR-cameralens, telescoop, astrofotografie, 3 temperatuurniveaus, voorkomt

Too cold to take my camera equipment outside, but I do use it to keep my coffee, hot and it does a wonderful job

Das Heizband wird wie erwartet in den drei Heizstufen unterschiedlich warm. Die Leistungsaufnahme schwankt zwischen 0 und 9 Watt, die Heizleistung wird also über die (Einschalt-)Zeit gesteuert. In der niedrigsten Heizstufe wird es handwarm; in der höchsten schon merklich wärmer - mangels Thermometer würde ich ca. 50° C schätzen (bei Raumtemperatur versucht).

Used product sold as new

As an avid astrophotographer, I often face the challenge of keeping my lens clear on cold, dusty nights. This lens heater has been a great solution, effectively preventing my lens from fogging up. However, the only drawback is that it requires more power than a standard 5V 2A power bank can provide. I had to purchase a more powerful power bank, which I also use for my flashlight, so it wasn't a big issue in the end. Despite this minor inconvenience, the lens heater performs exceptionally well and is a valuable addition to my gear. Overall, it's a good product that I would recommend.

Having read reviews of similar, but cheaper, products I decided to spend a few extra quid and get the Neewer dew strap as I've always been pleased with other Neewer products.Worked as expected when plugged into a power bank and a difference could be felt between each of the 3 heat settings. Fitted fine on the lens I plan to use as well as a 4" telescope I have. It does not wrap all the way round the telescope, but the elastic velcro strap bridges the last part. With heat coming from underneath it should not matter that an inch or so is missing at the top.However, when measuring the "max" temp reached by the strap it does not seem to tally with the documentation. That claims that you can get 65 degrees Celsius from the strap. However, even after letting the lens and body heat soak for some time in a room at around 19 degrees the max temp I recorded was just over 50 degrees C. Somewhat short of the 65 claimed.Is this going to matter? Well I guess I'll discover when I'm freezing my fingers off in the middle of Norwegian nowhere!