GOYOJOThermal Imaging Monocular for Hunting, 15mm Focal Lens 256x192 Infrared Night Vision Telescope with Long Battery Life, Thermal Scopes for Outdoor Night Vision Camera Telescope (15mm)

The media could not be loaded. # Physical constructionThe device fits well in hand and feels sturdy. The buttons have a good positive click and are weather sealed. For transport a carry case is included, which has some space to store accessories.When comparing this to a smartphone dongle thermal camera there are obvious advantages to the monocular form factor. Firstly this is much tougher. It will survive a drop. A phone with a camera sticking out of it won't. Secondly, having an eyepiece is a really big advantage, in the daytime you aren't competing with screen glare and at night time the light of a screen doesn't give away your location.The GOYOJO eyepiece is good, it's bright and at 800x600 pixels it looks sharp. The viewfinder diopter has a huge range of adjustment allowing you to place the apparent distance of the image quite close or almost infinity. This range of adjustment should be really helpful for people who wear glasses.The lens cap is rubber and fits securely. It is retained on a string to make it hard to lose. The string is long enough you can easily hold it and prevent it bouncing around while you move, again just very nicely thought out little details on this product. There is also an adjustable wrist tether to prevent you dropping the device.On the bottom there is a standard ¼ inch tripod mount which is compatible with almost any tripod or monopod. When unmounted the device balances well on it's nose making it easy to place down and bring up to a viewing position which is a nice touch.# Image qualityThe sensor is 256x192 pixels and runs at 25Hz. There is no latency and the image feels very "live" through the viewfinder. The sensor is paired with quite a large and fast lens making it quite sensitive for its size. The sensor does not need to recalibrate every couple of seconds like the Seek Thermal devices and is much higher resolution than the FLIR ones in the same price range.I have the 10mm model. The included carry case has a little extra space cut out so you can tell the 15mm version is about 5mm longer (funny that).As for color palettes the device has all the major palettes you'd expect in a thermal camera. Classic "Iron Red" being the most visually appealing and "Black Hot" being the most useful in my opinion. You also get "Rainbow", "White Hot", etc, etc.The menus on the camera also allow adjustment of image brightness and contrast. The default brightness is about one click too high for my liking but this is very easy to adjust.There are also scene modes which I haven't quite figured out yet. They appear to fine tune the image for different situations.# Sample imagesI've included a few photos taken with the device: cat tax, power poles, a fence in the sunlight, and some photos of the device and my reviewing process, and a screenshot of the app. The video combines a shot of a fast moving fan to show the framerate and two others of spotting and approaching a rabbit from 200ft away. Of particular interest to me is the range you can identify such a small animal at and how easy it is to see the rabbit while it is inside a hedge and completely invisible to the naked eye. The device does not have a microphone and videos have no sound.# Bonus featuresThis thing has a freakin laser beam. It can project a red dot which is pretty accurately aligned with the center point on the screen. This allows you to make sure you are looking at the right spot even if there is no thermal contrast. Nice!# Battery lifeThe battery provided is a protected button top 18650 battery 3200mAh from ZLY. Protected means that it has an integral over discharge board in the battery. These are the same kind you would use in a high performance flashlight and are readily available if you want to carry a spare or two. But you probably don't need to, keep reading!Powered off the device draws less than 4.4 microamps. This is far below the self discharge level of lithium batteries so it's effectively zero. (If you had a magic battery which had no self discharge you'd have to swap it out once every 83 years to keep the clock in this thing going)Powered up it's drawing 294mA on average with occasional spikes to 400mA when it moves the shutter. This should result in 10 hours battery life with the included battery! Conveniently it doesn't lose settings or the clock value when changing batteries so it's painless to swap if you manage to run one flat.Turning on additional features does increase the battery draw somewhat. WiFi adds 100mA, the laser adds 20mA, recording a video adds 30mA, if you turn the screen off by short pressing the power button you save 15mA. Really though none of this matters the runtime is excellent even if you turn everything on.Charging wise the device charges whatever battery is installed when plugged into USB (C). You can also run the device while plugged in if you need even more endurance.# App and WiFiNo permissions needed for the app! This does however mean you need to connect to the WiFi network the device broadcasts manually. But this is easy. When turning on WiFi on the device it will display the SSID and Password on screen. These stay constant until you choose to change them so typing these out is a one time deal. If you are on Android you'll see the "no internet connection available" prompt after connecting the first time. Select "always stay connected" and your phone won't prompt you any more about it. From there return to the app and hit "scan".The video feed has surprisingly little latency. Approximately 50ms by my estimation. The image quality over WiFi is just as good as through the viewfinder.WiFi range is pretty good at least 30 feet with no issues. Plenty of distance to allow you to put the device somewhere you wouldn't want your head to be while you monitor from a safe or warm location.# ImprovementsMinor but I'd like to see a setting to keep WiFi on both at startup. The manual notes WiFi is disabled at startup to avoid wasting power. Reasonable! But with battery life as good as this I think it's fine to let the user spend that battery how they see fit especially when there is an indicator showing the WiFi state.# ConclusionThis is a great device, it has none of the usability issues you might be worried about if you thought this device was simply too cheap to be true. If you are buying it for hunting I think the 15mm version is going to be worth the price difference but even with the 10mm lens you can easily see a rabbit at 200 ft in pitch black. Definitely a good buy!

perfect intersection of performance and cost, toss this into your pocket for biking, hiking, camping, hunting, finding thermal energy leaks on your home etc etc.I am in love with thermal again. About a year ago i bought a unit that attaches to your phone and it was and still is awesome, but for hiking and what not, i wanted to put it away and only whip it out when i needed it, but there was no fast way to put it away as it can be large with the handle and the wires every where that could damage ports so i started looking for a monocular style unit.i started out my thermal life in the 256x192 @25hz and didnt want to down grade so i started looking for models that had that spec. also, i wanted a model that could be attached to a screen of phone for more of a stationary viewing scenario but a small built in veiwing screen for one eye viewing was a must.also it must have 1/4 x20 threads for a tripod, a lens cap that is some how teathered to the unit so i dont loose it and removeable battery and it most cost between $300 to $500 dollars and thats when i landed on this unit.It is perfect for a waist style bag, plate carrier pouch etc etc, quickly pulling it out and viewing your targets. also, it has a standby mode so you can power it on, then tap the power button which seems to turn off the camera and the viewing lens to save on battery and put it away, so when you pull it out you can quickly whip it out, tap the power button and get to viewing.the removeable battery is a 18650 li-ion cell, which is very common and inexpensive, you can likely buy a 4 way charger and 4 cells, so you can take enough batteries with you for many days of use and its super easy to swap the battery out.the camera also has a highest temp box that it can overlay on the screen, this may help you identify warm things on the screen that your eye might be missing for some reason, on my other thermal camera this is what helped me see a mouse hopping around on the bank of a canal about 80 feet away, other wise i would have missed this one.cons:1 getting used to that tiny screen that you hold up to your eye, at first this was really throwing me off, coupled with not properly adjusting the focus, which was my fault, i thought this unit was junk but i was wrong in all sorts of ways, now i love that little screen, also that little screen doesnt light up your entire face like the phone style unit will do, this is really not much of a con.2 here is an actual real con, that is not a deal breaker and i suspect most people wont even use this feature. you can turn on the wifi on this thermal camera, install the "thermal camera app" on your phone, and link the phone to the thermal camera, fire up the app and view and somewhat control and view the thermal camera on your phone. its hard to get the app to connect reliably to the phone and once it does it will disconnect and crash about every 3 to 5 minutes from my experience. some times you have to even power cycle the thermal camera to get them to reconnect in the app.3 it has 16GB of internal storage, the box says 16GB sd card, but this just isnt true. 16GB is not very much, but the resolution is low so maybe it will last a few months of filming occasionally, then you will connect to your pc to drag the items off and delete them from internal storage and you should be good. it would have been better if you could just add a 128GB micro sd card of your own so you dont have to worry about space for a long time.4 manual focus, im not sure why its manual but my other one is too, maybe it helps make it more precise? be prepared to be adjusting it if you are constantly looking back and forth between close and distant objects.i may purchase another one so that i have two and can people out with me on hikes, but the next one will be the slightly higher resolutionthis unit is a 9/10 to me

This thermal camera performs equal to or better than other thermal optics on the market, for least expense.This thermal camera can easily show heat signatures at 500 yards or closer. We’ve had luck at 600 yards at times, verified by a range finder, spotting heat but not able to identify.The reason for the four star review, the WiFi on the device doesn’t connect, the device I received does not produce a WiFi signal.