Binocular lens fog problem

[Jmatt1957]

when I wear a face mask my eye piece lens fog up.My face mask is a mesh type with the mouth and eyes cut out. Any advise on preventing this would be appriciated.

[yaderehey]

Whenever I experience this it is because my face mask is directing moist air from either my mouth or my nostrils towards the eye piece lenses. Only way I know to try and prevent it is to adjust or modify the face mask to change the direction of the exhaled air flow.  In your case cutting an opening for the bottom of your nose might help.

[Tajue17]

I notice my steiners fog up when its really cold and I think its from my eyes beign too close,, I turn the eye cups so the part that sticks out usually for the sides to block the sun,, well i turn those down so they keep my eyes from getting too close and then their fine.