Posted by a reviewer on Amazon

That said thermal vision is also considerably more costly than daylight or image intensifier scopes and until recently boasted very low image resolution making it difficult to figure out what it is that youre looking at

Posted by a reviewer on Amazon

But the desire to reduce weight also means some tradeoffs in particular the model does not have a focusing ring and you generally wont be able to get a sharp picture of anything closer than 5 yards away

Posted by a reviewer on Amazon

This may be a drawback in close quarters type of situations or if you just want to play with thermal imaging around your backyard without putting it on a gun

Posted by a reviewer on Amazon

The other drawback is that the model does not have an internal shutter thermal sensors need to be recalibrated every minute or so in response to the unit itself warming up or cooling down

Posted by a reviewer on Amazon

Many thermal cameras including pulsar do this automatically by closing an internal shutter

Posted by a reviewer on Amazon

All of this is understandable

Posted by a reviewer on Amazon

For one reapir comes with a black and white display whereas many competing 640x480 units now feature fullcolor amoled

Posted by a reviewer on Amazon

Finally to connect the unit to a computer to download captures you need a costly proprietary cable not included in the box