Scope lens

Discussion in 'Tips, tricks and tutorials' started by Bill Fowler, Nov 22, 2018.

  1. Bill Fowler

    Bill Fowler Member

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    What do people do to stop your scope lenses misting up through winter shooting please.
     
  2. Slip Stream

    Slip Stream Experienced novice

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    How do you mean ?
    Is it the eye piece, ! If you breath near it, or is something else ?

    I've been using rifle scopes for over 39 years and ( apart from one Russian built )I've never had one fog up even when used in the Arctic circle .
     
  3. Ceathreamhnan

    Ceathreamhnan WHFTA Champion 2013

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    Don’t breathe on it
     
  4. Bill Fowler

    Bill Fowler Member

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    Shot at the weekend couldn't tell whether it was glasses or scope but I thought prevention is better.
     
  5. DaveRob

    DaveRob Member

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    Rainex…. wipe on wipe off and no misting
     
    top gun phil, Bill Fowler and C.Eaton like this.
  6. C.Eaton

    C.Eaton Confirmed Anschutz Nut...

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    Good idea, I've used on cars and it's pretty good.
    Is there definitely no residue left on the lens as an expensive scope is a whole different beast to a car windscreen?
     
    top gun phil likes this.
  7. DaveRob

    DaveRob Member

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    Their is a lot of debate about this stuff and its use on optics, especially camera optics, most ppl say NO No No as its actually oil based but the specific anti fog rainex I have used on some pretty high end filters and the coatings haven't degraded.... We did use rainex a lot in car racing at one time but we actually changed over to a VERY mild soap solution as it worked just as well in the end..... some of the lads used shaving foam... it all worked.... as with all things on the internet its buyer beware ;-) but its never been an issue on my coated filters and a bit of shaving foam would work just as well.... don't use the scented stuff though lmao
     
  8. Welsh Wizard

    Welsh Wizard FT: You Give, You take! Staff Member

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    A leupold scope
     
  9. RobF

    RobF Administrator Staff Member

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    Condensation is caused by things being cold being hit by warm air which holds more water than cold air (contrary to the myth that cold air makes pellets sink because it's denser due to moisture content).

    When your breath hits a cold lens the water in your breath (which is warm) is forced out and condenses on the surface. Dirt and grease aids condensation, and your finger grease really attracts it.

    So the way to keep it to a minimum is to keep the lenses clean. Using a good quality lens brush keeps the big bits away, a puffer can be a better way than rubbing a lens with a soggy tissue in the field, good quality lens wipes at home do the rest, and very occaisionaly a really good quality microfibre cloth for any drip marks... but the latter are very hard to find.

    Kept clean they'll mist up a lot less, especially if you learn to breathe away from the scope.
     
    Bill Fowler likes this.

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