I've been using a Ltl Acorn 5210 for the last 18 months & although compact & easy to use I'm not too impressed with the night time performance. Although it detects the heat source easily enough, the resulting video images are much too dark. I might be doing something completely stupid, but do any of you have the same problem & if so how did you remedy it? The previous Bushnell worked a treat but was battery hungry & needed a bloody thick tree trunk to support the weight!!