Night Vision Clip on NV question

[Riverlife87]

Just got a armasight co LR from a buddy, spec sheet has super high numbers and shows no blemishes. Under magnification i see quite a bit in zone one. Is this normal for a unit that says no specs when magnified. Virtually nothing on it when looking at it with no power

 

[cake5150]

You can magnify the cleanest tube on planet earth and still find some tiny blems. There are certain size thresholds for a blem to be counted on the spec sheet. I wouldn't worry about it unless it interferes with function, which they usually don't.