Only one way to tell, here is what I did. I went to a store located in the country who sold all the big names. I wanted to see 6mm bullet hole at 500 yards. I took a shot target. I located a telephone pole almost 600 yards away. I was able to look through 6 top end scopes. Took a friend along, we both looked and did not discuss what we were seeing. I went with the idea to but a Swaroski. I wrote by pick on a piece of paper and had my buddy do the same. We compared notes, we both picked Zeiss. So my Ziess Diascope 85 has served be well for over 12 years. Now, here is the rest of the story. I also have a B&L/ Bushnell Dicover I think is 15 to 60. For 90 percent of what I need it works fine, its 40 years old and was 150.00. Will it work for 500 yd Bullet holes in all conditions, NO. But to get that little extra was an extra 3000.00 dollars, worth it to me but maybe not to everyone. I see lots of guys with 500.00 to 800.00 dollar scopes trying to do the same as me but 99 percent of the time they are worthless. So, know what you require and test for what you need with your eyes, only way you can make a good decision, for you. I had to drive 4 hours to do the test I did, it was worth it.