Could somebody give me some info on this scope ? Are they any good ? , I have one but the screen doesn't seem to light up ? the tubes inside do and it's fairly clean inside and out . Any info would be appreciated. thanks
http://i20.ebayimg.com/05/i/000/cd/c5/b544_3.JPG
http://i20.ebayimg.com/05/i/000/cd/c5/b544_3.JPG