ATN Viper was the best suited to the task, headgear is awkward. Focusing eyepiece and close focuses. Not telephoto (1:1). Don’t make them anymore but great for the job.
I have the Viper for use in the darkroom when needed but so far I have not had to use them very often. I agree with Bill that the headgear is awkward to use and probably the biggest reason I don't use it often in the darkroom. I took it out camping a couple of years ago and thought I would have a look around while we were getting ready for bed and looked across the towards the trees across from our site and saw a couple of eyes looking back at me from the dark. Last time I did that and I did not tell my wife.