Based on a number of posts on PST ITF filter, I mustered up some courage this weekend and opened the eyepiece section (views lately have been very fuzzy without any details, also cannot see any prominences which were visible earlier), it opened without any issues. Here is a quick shot of the business end, does it need to be replaced? I am by no means experienced on this, trying to get ready for the upcoming Mercury Transit. Any inputs/suggestions would be helpful to me. Thank you.