u/Guilty-Resort-4665

I want to get into night vision and I want dual tubes but I just don’t know how big the difference is between the 15 vs the 31 I tested the 31 against the 14’s and saw a massive difference but how big is between the 15 and 31. I want it to be a one time purchase I don’t want to regret later on “but I don’t want to spend money I don’t need to”.