Most binoculars sold have a zoom capability.
Zoom and fixed-power binoculars differ in exit pupil magnification, which controls the amount of light allowed into the optic chamber. Zoom binoculars generally perform better at lower exit pupil settings. Unless you are a certified lens technician it is not recommended you try to repair any lens damage yourself. Repairs you can perform in a home workshop include cracks in the housing, sticky or stuck dials and levers, or gaps between housing and barrels. Use a checklist to go through the optics to get them back up and functioning again.
Instructions
1. Go over the entire outer cover of the binoculars. Look at the hard rubber, particularly around the ends where the lens caps fit and at any dial or lever, for cracks or gaps between the cover and the optic barrels.
2. Apply clear super adhesive to the cracks or gaps. Use a cotton swab to get the adhesive under the gaps. Push the gap down with a finger until the glue sets and the gap is closed.
3. Unscrew any dial or lever from the optics. Dip the end of a cotton swab into degreaser and wipe off the threads on the screws and on the holes. Add lubricant to the threads and hole. Screw the dials and levers back on. Press or spin them to test the lubricant and work it into the mechanisms.
4. Squirt lens cleaner onto the non-abrasive cloth and clean the lenses on the binoculars. Go all around the edges to make sure any grime on the lens edges is removed.
5. Blow off any further dust particles from the lenses and hard shell using a can of compressed air.
Tags: cotton swab, cracks gaps, dial lever, dials levers, exit pupil, gaps between
