Taking the thermal monocular out of its box and removing the lens caps, I turned it on and put it to my eye. I looked out of the kitchen window into the dark morning, expecting to pick a rabbit or other critter out in the garden. To my surprise, all I saw was my own mundane reflection staring back at me. I suppose I’d never really thought about it before, but I didn’t ever consider that the reflection in a glass window would have a heat signature, yet here was the new ZEISS DTI 6/20 picking it up. I’d never seen that in a thermal before; I was impressed.
Wanting to put the machine to the test in a more trying environment than my kitchen, I called up my friend Harry Coups, the agent at Grimsthorpe Castle just up
