Matchdot polarizer lenses loosening

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Matchdot polarizer lenses loosening

Post by Taroman on 4/24/2014, 12:41 pm

I have several MatchDot II optics in use on different guns.
The adjustable polarizers are useful when shooting in bright sunlight to prevent dot washout.
Problem is, after some use, the lenses loosen and rotate erratically, blacking out the view in the middle of a shot string.
Distracting, to say the least.
The lenses are held in by o-rings. Pressing on them to tighten has little effect.
Tried superglue on the edge and ruined the unit.
Ultradot doesn't warranty the polarizer (accessory).
Anybody have a solution other that buying new polarizers all the time?


thanks
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Re: Matchdot polarizer lenses loosening

Post by Jack H on 4/24/2014, 1:00 pm

Use a spot of your target pasting masking tape.
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Re: Matchdot polarizer lenses loosening

Post by DavidR on 4/24/2014, 3:02 pm

lobster claw rubber bands is what most use but if it gets real loose inside the lens will spin even if its housing doesn't so what I found fixes it is to put a dab of super glue on a tooth pick and put it on the inside lens at the bottom. Then it stays and turning the outer lens darkens it. Or the 3rd option is to remove one lens, then it acts like sunglass and stays one level or do like most and throw it away and wear tinted shooting glasses.
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Re: Matchdot polarizer lenses loosening

Post by Al on 4/25/2014, 9:40 am

"do like most and throw it away and wear tinted shooting glasses."

This!
Tried using the filter when I first started, with the same frustrations.  Then went to polarized lenses in my prescription lenses.  No more problems.
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Re: Matchdot polarizer lenses loosening

Post by DavidR on 4/25/2014, 9:59 am

try zenni optical online, if you have your prescription you can get tinted glasses frames and all for as little as 20 bucks.
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Re: Matchdot polarizer lenses loosening

Post by Yiogo on 5/21/2014, 6:58 am

You can also buy the flip up polarizing sunglasses to go over your prescription glasses. They are pretty inexpensive. Yiogo

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Re: Matchdot polarizer lenses loosening

Post by Yiogo on 5/21/2014, 7:00 am

I've also seen the o rings for sale.  Ultradot says cleaning fluids ruin the rubber o ring. Yiogo

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Re: Matchdot polarizer lenses loosening

Post by Ed Hall on 5/21/2014, 9:29 am

A small amount of silicone will adhere the lens to its holder (or, o-ring) and lobster claw rubber bands or simple tape will secure the two pieces from turning.

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Re: Matchdot polarizer lenses loosening

Post by Taroman on 5/21/2014, 4:48 pm

Found the perfect fix.
27MM camera filters thread right onto the 30MM Matchdot.
Ordered a few (~$4 each) ND2 and ND4 off eBay.
Just screw in the one that's needed for conditions.
Problem solved for good.
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Re: Matchdot polarizer lenses loosening

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