How do I tighten the hinge on a Nikon Sportstar II binoculars?

Cloudynights person says it was very difficult to get the cap off the hinge so that he could tighten it. He had to hone small screwdrivers until he could pop off that hinge (it is so well sealed for the WR rating, I suppose). Then he could get to the bolt that tightened the hinge so the binos stopped flopping about. I still don't know how he got that cap off, though.

Simple solution: Pry or unscrew the cap covering the end of hinge shaft on the rear of the binocs (between the eyepieces). Use a screwdriver that fits snugly in the slot on the end of the shaft & tighten to desired tension. Place a dab of Goop-type cement on the inside of the cap if it was pried off & press it firmly back on the shaft . Helpful hint: Slide a small knife blade (an old dull one you don't use for cutting) under the cap and gently work your way around to pry it off. Note the position of the index numbers before you remove it so you can replace it in the same position.

Does this pair have two parallel tubes with a bridge in between?
If it does, then removing the caps at the eyepiece end of each hinge will reveal a grub screw. Tightening these will add tension to the hinge and give you the proper feel once more.

Most compact binoculars have a central bridge. The objective (big lens) end of the binocular hinge usually has a ball bearing in it. The other end may either have a blanking cap or a hub where the neck strap attaches. Removing this cap or hub will reveal a grub screw which tightens another ball bearing against the bridge. Take the appropriate part off the limp side and look for the grub screw. Tightening it will decrease the "limpness". Be careful, as these are sometimes set in place with a locktite of some kind. Best to release pressure first before tightening.

It depends upon the model.
For Monarchs the serial number is on the underside of the RH hinge
On the Actions it is on th central hinge plate with the PD scale
For the compact Sportstars it is under the central bridge.

must have been dropped ...have to be realigned if you want i can supply estimate 15088331232 ...larry

under the bottom hinge cover there should be a hinge nut you can tighten, if i can help further call 5088331232...larry

there is a hinge nut at the bottom of the hinge..sometimes you have to turn of the cover or peel back the rubber to get at it

Hi cmbaldwin,
Double vision is caused by misaligned collimation,
Make sure all segments are screwed tightly together.
including the screw under the little cap on the center hinge.

If none of the above fixes it, you probably have a misaligned prism In the binoculars. That unfortunately is a factory fix.
I would call Nikon customer service on the phone,
Tell them you love their product, but are very, very, frustrated with the same problem repeating itself ( I hope you haven't dropped the binoculars)

If you get nowhere, ask to speak to the customer service manager, explain the problem all over again.
If that will not resolve it. Ask them them if they have a trade up program.
Never hurts to ask.

As you say, they are a outstanding company to work with.
and let them know that you won't settle for anything less than a Nikon. They do want you as a lifelong customer.

Don't get frustrated, just keep jumping through the hoops until you get the problem resolved to your satisfaction.
Good luck and best regards, Paul