I was looking at the Zeiss 8x40 victory BT’s specs and there are two numbers that I am not too sure about.
1. Twilight performance. The BT’s scored a 17.9. Is this a good score? Is a higher number better than a lower number? What exactly does this number represent?
2. Relative Geometric Brightness. The BT’s scored a 25-same Q’s as above.
Thanks for the knowledge,
Brett.
check out:
http://www.meditec.zeiss.com/C1256E...ex/?ReadForm&84
click on T..as in Twilight factor..
the higher the twighlight factor, the brighter the image. usually.