I am new to binoculars world and and found this great forum. I have already picked up a few good tips here. So much knowledge and gems. This is my first post. So, please forgive me if I have posted in a wrong section. I am more than happy to move it.
My wife and I have a Glacier National Park trip coming up. Immediately I thought we should bring binoculars because it will be a great opportunity for wildlife spotting, as well as the high elevation stargazing. I found a pair of no-name 15x60 porror prism with Bak4 for my wife. It needed some vertical comlimation when it first arrived. I followed the Oberwerk instruction and successfully colimated it(arguably but much better than before). It works great and she loves it.
Then I found myself a pair of Jason Empire Mercury 10x50 in the used market (similar to this one). The condition is good but it needs vertical colimation as well. This time, the Oberwerk method is not applicable (at least i can't see it) because the four screws mentioned are not visible on this Jason. My question is, how do you colimate (if possible at all) an older binoculars like this Jason?
-------------------- Barska X-Trail 15x70, Jason Empire Mercury 10x50, china-brand 15x60