Hi. My Nikon Sprint 8x21 diopter lens came off after a fall. I am battling to understand how it fits to the body of the binoculars. Is it glued on, or is there a part that fell out?

Here are the steps to collimate your Nikon Venturer II10x23 6.3 degrees compact binoculars:

1. Adjust the diopter: The diopter adjustment is usually located on the right eyepiece, and it helps to adjust the focus of the image for your right eye. Close your left eye and adjust the focus of the right barrel using the diopter adjustment until the image is clear.
2. Look at a distant object: Choose a distant object, such as a building or tree, and focus on it using both barrels. Keep your eyes on the object while you perform the next step.
3. Adjust the barrel alignment screws: The barrel alignment screws are located on the hinge that connects the two barrels. You may need a small screwdriver to adjust them. Use the screws to adjust the alignment of the barrels until the images in both barrels are aligned. If the image on the right barrel is above and to the right of the image in the left barrel, you need to adjust the right barrel downwards and to the left.
4. Test your binoculars: Once you have adjusted the alignment screws, check the alignment of the barrels again by looking at a distant object. If necessary, make further adjustments until the images are aligned.
5. Repeat the process: Over time, the alignment of your binoculars may shift slightly, so it's a good idea to check the alignment periodically and make adjustments as needed.

the right lens is also controlled (overridden) by the diopter focus ring. may take both pins to repair.

diopter focus ring behind central focus ring.

possible that the set screws are loose and not turning the eyepiece inside..other than that try cleang the lenses...larry@reichinstruments

First you must focus the left eye on a given object with the center focus wheel. Once the left eye is sharp while looking at the same object adjust the right eye to be as sharp as possible. The right eye diopter is only meant to adjust for the small differences between the eyes.
Thomas E. Kuenzli Eagle Optics (800) 289-1132

The entire diopter setting eyepiece was off.I separated the eye cup from the rest of the diopter setting eyepiece, and aligned the channel guides on the lens piece to slide it into place. Then holding it in place, taking care not to gum up the lens, I experimented with how to screw in the retainer ring so that its white dot registered correctly. Finally reattach the eye cup and focus. It's like new!

this is usually caused by the bino's being dropped or banged knocking the internal prisms out of alignment.

did you check out the camera with another lens? is the mirror returning fully down to the mirror stops? is the diopter on the finder adjusted properly?
i would not send both the lens and body together, unless there is impact damage.

hi,

are the photos also blurred when they come out? if adjusting the diopter doesnt fix the issue, you might need to have your camera and lens calibrated. why the lens? its because the issue may be isolated to the lens calibration otherwise the technician will only calibrate the body.

I agree with you on that! I have a feeling they are either Nikon or Leupold sourced. The body is alot like green ring leupold ive seen but the lenses have a magenta multicoating on a lens surface which ive seen on nikon. I'm in the process of looking for the maker of them myself as I need an objective lens. I'm going to call the Cabela's Cust SVC number and see what they say. I've heard the new Euro styled binoculars are made by Meopta.