Tasco Sierra 10X42 Binoculars
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- Quality optics with stunning HD clarity
- 100% quality materials used and tested extensively
- Beautiful design and durability built to last
- Rugged and with a big 50mm objective lens
- Waterproof full-size binocs
- Ideal for long-range observation
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|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Sold By||Amazon.com||Amazon.com||Amazon.com||Amazon.com||M Z Photo|
|Item Dimensions||10 x 13 x 3 in||3 x 7 x 8 in||3.11 x 6.1 x 5.91 in||3 x 9 x 5.75 in||—|
|Item Weight||1.1 lbs||2 lbs||1.85 lbs||0.77 lb||1 lb|
|Objective Lens Diameter||42 millimeters||42||42||32 millimeters||25 millimeters|
No matter what the day has in store, our new Sierra binoculars keep foul weather out and deliver bright, crisp views with 100% waterproof, fogproof construction and premium multi-coated optics. Their rugged rubber armor protects against rough handling. Specifications.Objective Lens Diameter: 42mm.Lens Coating: Multi Coated.Focus Type: Center.Comes with case..
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Not to worry though, I've fixed hundreds of cameras, telescopes, etc. in my life. This would be a fun project (for someone like me).
Here's some help for those of you that might have gotten a bad pair. (Tasco never known for their stellar construction and product line. I knew what I was getting into.)
If there is no rattle in your binocs, you're in luck. The fix-it process is easier. The rubberized coating on each half of the binocs peels back from the eyepiece end in a sort of snap-lock fit. Peel-back the one on the right-side optical assembly. You can then slide the whole rubberized housing off from the large end. You will find 3 alignment adjustment screws near the focusing wheel. They will be covered with some clear-sealant. Your basic 3-contact optics-ring alignment setup. Rub-off the clear-sealant. Then loosen one screw and tighten the other two. Look through the binocs. Did the two images line up better? Continue on in that direction of adjustment. If worse, reverse your process and loosen another and tighten the 2 opposing ones. Continue on in this manner until you have perfect alignment. You'll learn by trial-and-error which direction they should be moving to as you adjust them a few times. Always take your eyes away from the binocs for a bit before checking again, to give your own eyes time to settle back to normal muscle positions.
Worse-case scenario (as I got mine), the prism-assembly might have gotten loose from all 3 alignment screws and is no longer being held firmly between them. Strongly grasp the base of the right eye-piece (if the right-side is the one rattling), next to where it touches the main housing, and unscrew it counter-clockwise. Loosen all 3 alignment screws to give you enough space for the prism-assembly to fall back between them. Tighten the screws enough to hold it in place. Try to get them evenly screwed-in so the prism-assembly sits centered in the main housing. Replace eyepiece. Proceed with the first part of how-to-align.
I'm not sure if the left optics assembly is the same way. I didn't open anything on that side because the rattling prism was enough to let me know which side I had to work on. The left side might be a no-adjustments "standard" by which the other side is adjusted to. It will usually only be one-half of the 2 optics trains that will fall out of alignment in binoculars. If both are out of alignment, this can become a bit of a nightmare. Because if you adjust them wrong, they will be in alignment when the two-halves of the binocs are close together but go out of alignment as you spread them apart, or vice-versa. So try adjusting just one side first, the one you suspect to be in error, most likely the right one (judging by how these were constructed).
(There is also a way to increase the close-focusing distance to only about 8 ft., which I really like and needed, but that process is too long to describe here. If anyone wants though, leave a reply and I'll get back to answer it sometime.)
When aligned properly, these are actually very good binocs for the price. If you got a bad pair, and don't mind a little fiddling, you can still get some decent binocs out of them. (Though after opening them up and seeing how they are constructed, I wouldn't place any bets on how water-proof they claim to be. Water-resistant, yes. Keeps out the rain? Pretty much. A dunking? I would doubt it. :-) )
Cons: not very clear, double images, small eye lens.
Once you look through them they aren't very clear and you have to turn the knob a long time to focus properly. The main issue with these is that you see the main image with a fuzzy repeat of the same image if you use both eyes. It also has a very small eye lens that is difficult to focus through so your eyes end up hurting for a short time.
The best thing to do with these is saw them in half(including the focusing piece with one side) so that you can have two monoculars, one that focuses and one that doesn't. Cool, huh!