I've had these binoculars for more than six years. They are totally outstanding.They are supremely bright, sharp and are fast focusing. They have a wide field of view and feel great in the hand. I birded with them for hundreds and hundreds of hours in all kinds of conditions. They've traveled from the heat and dust of East Africa to the humidity of Central America. Two years ago, during the Christmas Bird Count, I changed my clothes twice while birding in pouring rain. The binocular's seal held tight while exposed to hours of torrential downpours. They are expensive but the quality of these binoculars makes them worth the cost. One day I found that I had dented one of the binocular tubes on the end. Although it didn't affect the view, I didn't like how it looked. I sent them back to Zeiss for repair, expecting to pay. They repaired them free! I was very happy with the service.