Focusing Yukon NVMT 20040WP Monocular

Does the IR light up? Also, is there a switch to turn on the IR. Don't look in the IR lens use a mirror or in darkness put you hand in front of IR lens. stewbison

Don't IR illuminator in the dark room. Turn on a small light in one of the corner; such as, a small light bulb. increase ambient light a little at a time until you can focus. You flooding the dark room with IR illumination which will reflect everywhere in there. This might take care of the fuzziness in the monocular. stewbison

Hello David. David you night vision doesn't use any batteries that one installs. You have Kalinka Zenit NV monocular that is Russian manufactured but is sold by Night Vision Optics. Your night vision uses a piezo electric ignitor to charges the batteries and charge a couple capacitors.

The lever on top to the Zenit monocular is activated by squeezing the handle that is covered in a rubber type material. Just keep squeezing on the lever and in while things will start working. Best of Luck David. GB...stewbison

it sounds like the light "pickup" at the front is not working,, was it stored with the front lens cap fitted and in the dark? if not you may have bamaged this "pickup" it could also just be dirt on it,,you can undo the front lens and clean the "pickup" if the unit is turned off and you use a soft lint free cloth

The scope may flicker or flash when used in a bright environment. To fix this you should only use a NVMT in a dark. It will restore itself in a few minutes or hours, depending on how long it has been exposed to light.
It may also flicker for the first several seconds of use in dark, before the device corrects itself.
With a severe exposure to bright light for prolonged time the light enhancing unit may damage beyond repair.

Weak battery (below 2V). Lens cover on. Focus off (it can be adjusted). Too bright environment.
Without handling the scope myself these are the best guesses.

Define 'clear'.
Is it blurry? Focus the scope or clean the lenses.
Is it distorted? Don't know how to fix. Especially if the lens is cracked/scratched etc.
Is it dark/snowy? Put fresh batteries in.
Do you see black spots in the tube? Don't worry, certain amount of these are quite acceptable.
Anyway: It's a night vision for pete's sake. The picture won't ever be like the one on normal binoculars.

'it does not have objective lens'?! Yes, it could be the reason why you cannot see anything. Your NVMT should have a lens in both ends. It's just a regular telescope with some extra features.

take the flipping cover off

Try to jank it left-right and simultaneously try to force it back to threads (either pulling or pushing). Don't hit it with anything since this may damage the insides.