Scope going blurry at highest magnifications

[bigfella350]

Anyone ever experienced a scope you've owned for awhile and never had any sort of trouble with, all of a sudden start being blurry on its higher powers ? In my case it's a sightron s-tac 4-20x50. Worked perfect the past 2 years and didn't even really have any darkness/ or bluriness around the edges even on 20 power. Shot targets out to 800 with it several times. This has me boggled though, it's not the parallax adjustment or ocular adjustment either. I've already fiddled with both of those.

 

[Dr. Vette]

I had it with a Burris pistol scope. I sent it back and they repaired it. Works fine now.

 

[Buck Buster]

I would do what the Dr. prescribed. Something happened to let the gas escape or something is wrong with your coatings. Good luck, I'm sure it or a new one will be back to you fast.

 

[bigfella350]

I think your right. I've never experienced one going bad in that way and work on powers 4-16 fine but go completely blurry on 18 or 20. I'll send it back to sightron. It's been a great scope for 2-3 years now.