I am a little confused on what is happening. Are you twisting up the eye cup and it doesn't have a stop? or is it just pulling up and off? on the swaro eyecup, it shouldn't slide, it twists, it is threaded. if it has been removed and not screwed back on all the way down, it will then unscrew right off without stopping. once you remove the cup you then need to thread it on all the way down before it will engage the stop again. if it just pulls straight off it is either cracked, or broken. if you call Swarovski they will help you out. just be aware that they do not service spotting scopes in the USA like they do their binoculars. spotting scopes are generally sent back to Austria and they will charge you a fee if they feel it is not a factory defect. If they tell you if needs to be sent back I would take it back to Cabela's and exchange it. the good and bad of Cabela's is they are expensive but they are the Nordstrom's of outdoor products.
