Having compared, not 8x but 10x, this two binoculars, my HT 10x42 and the shop's Noctivid, for several hours, the LEAST thing I would be concerned, is the light transmission difference!! To me, the TRULY EXCEPTIONAL veiling glare control of the Noctivid is really a BIG step over the others first class binoculars, overlapping 2 or 3% of light transmission!!!
I read the GLOBETROTTER's Noctivid mechanical problems with some concern...I hope it would be an initial samples issues...the Noctivid will be my next binocular!!!