NEEWER USB Lens Heater, 12"/300mm Lens Warmer for DSLR Camera and Telescope, 3 Temperature Regulator Settings, Dew Heater Strip Prevents Dew, Fog & Condensation for Telescope Camera Astrophotography

I've got this so that I can use my camera for long periods in the dark. Specifically, I'm getting back into Timelapse photography, where I'll be running the camera for several hours in the dark. It's highly likely that even with a lens hood on, it'll get dew on the lens. So, one of these wrapped around the lens should be more than enough to keep the dew off. I think for the most part, I'll only need to use it on the lowest setting, but it's good to have more power available in case I do the stupid thing and forget to turn it on. I'm planning on powering this from the USB powerbank, which should give me enough power for the sessions that I have in mind. (several hours from before sunset to maybe after sunrise.

Don’t know why I didn’t have one of these already. Really worked out well and the lens remained crystal clear all night long! Good value for money and extended my session (ie forgot to check lens the night before and had over an hour of pics taken through a fogged up lens!) Added this the next day(prime delivery) and the fogging is a thing of the past!

A nicely made dew heater with included storage bag that does its job but seems also to be intended as a hand warmer and baby bottle warmer (sic). Even on its lowest setting stays at about 40 degrees C, which is much warmer than you are likely to need to control dew. I bought it for astrophotography use and there its important to keep the camera sensor cool to reduce noise. I would be concerned that this would heat the lens up sufficiently to also affect the sensor which is not great. On first press of the power button it comes on at the high setting (55-65 degrees) which would even be damaging for the lens and potentially painfully hot to the touch. Further presses select medium then low. A lower setting - say 30 degrees - and default to lowest not highest heat would make it ideal

Great item when you need it

Does exactly what I need it to do, can be a little bit of a faff with most focusers being at the end of a lens but it works for me in freezing weather no problem

Currently use this as a supplimentary heater around a smart telescope to ensure batteries and electronics are not exposed to subzero winter nights. Great value for money and easy to use.

Works well but sucks the juice out of power supplies. All 3 heating modes worked well and I only needed it on the low setting to keep my telescope dew free. If you're running from mains power then it's really good but it drained 10000mAh power pack in a under 4 hours.

Works a treat for long nights of Astrophotography. Beware, it will very quickly drain a power bank so don’t leave unattended without keeping an eye on levels!

温度もしっかり上がるし、巻きやすく使い勝手は良いです。

A simple item, keeps lens warm to avoid dew/condensation problems. Good Things: -Sort of elastic-y, seems to fit 50mm to bigger lens (see picture) -Will run all night on a large USB power brick, did not try with a small one -Has 3 power settings Where I live, cold is 35F, so I did not try it in the snow or where 'cold' is colder than that. Before using this I did have problems with lens condensation in situations where the camera/lens were outdoors overnight. This fixed that problem. Low worked for me (~40F) overnight. I did not try other settings. Did not use with 'star tracker'. Cannot speak to that, but I doubt that there would be problems. Bad Things: -None that I can think of

funciona perfecto, me encanto.

I really like the elastic velcro attachment. I means I can get a nice secure fit a round the telescope.

Perfecto cumple su cometido todo ok