I own one of the 2-10x40 ZA5 Minox scopes. They are good optically in the daylight. They are no better than the old Leupold VXII's in the low light performance. They also have a very narrow alignment field at 10x. They are okay in field alignment up only to 8X, at 10X they are very touchy and especially difficult to find the field of view in low light. The are equal to the Conquest in daylight but not at dusk or really low light.
The other thing that bothered me about the Minox is value. Mine is the 2-10x40 BDC which I paid the going price for ($510). Now you can buy them new on several venues as open box, or demos for as low as $319. Which means used, they are worth $250. I have never bought another German company optic made in the US or Germany which was worth half of its price used!
If you pay a little more money for the Conquest, it will still be worth nearly its retail as used merchandise.