I just purchased a Vortex crossfire II red dot from Cabelas. This red dot sight has 11 illumination levels. Noticed there was no dot at low levels from 1 to 3 at all. I tried three new batteries, all the same. I turned off the lights in the room, total darkness, still see no dots. The lowest level I can see dots is level 4. Has anybody else having the same issue, or is mine defective?




















































