Re thabela ho u tsebisa sehlahisoa sa rona se secha -- likhalase tsa acetate optical. Likhalase tsena li entsoe ka boleng bo phahameng ba acetate e le thepa ea foreimi bakeng sa ho feta le ho tšoarella. Liforeimi li entsoe ka bokhabane ebile li le setaele ho lumellana le libopeho tsohle tsa sefahleho, li u boloka u le setaele ebile u phutholohile esita le letsatsing.
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Likhalase tsa mahlo li ka boela tsa kopanngoa le likarolo tsa letsatsi la khoheli ka mebala e sa tšoaneng, kahoo u ka li apara ho ea ka liketsahalo tse sa tšoaneng le likhetho tsa botho, tse bontšang mekhoa le botho bo fapaneng. Ebang ke botala bo hlakileng, boputsoa bo makatsang, kapa lilense tsa pono ea bosiu, u na le tsohle tseo u li hlokang.
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Lense e entsoe ka thepa ea UV400, e ka sireletsang mahlo a hau hamolemo, 'me e hanela tšenyo ea leseli la ultraviolet le leseli le matla e le hore u ka kholiseha le ho phutholoha mesebetsing ea ka ntle. Ebang ke matsatsi a phomolo a lebōpong la leoatle, lipapali tsa ka ntle, kapa leeto la letsatsi le letsatsi, likhalase tsa mahlo li u sireletsa ka hohle ho u boloka u phetse hantle ha u ntse u thabela letsatsi.
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Ho fapana le likhalase tsa letsatsi tse tloaelehileng, likhalase tsena tsa optical li kopanya mesebetsi ea likhalase tsa optical le likhalase tsa letsatsi, tse u lumellang hore u sebetsane ka katleho le maemo a fapaneng a khanya ntle le ho nka likhalase tse peli tsa likhalase. Ebang ke ka tlung kapa ka ntle, likhalase tsa mahlo li tla khotsofatsa litlhoko tsa hau tsa pono, li u fa monyetla oa ho natefeloa ke pono e hlakileng le boiphihlelo bo monate.
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Ka bokhuts'oane, likhalase tsa rona tsa li-clip-on ha li na ponahalo ea setaele le lisebelisoa tsa boleng bo holimo feela empa li fana ka tšireletso e felletseng le boiphihlelo ba ho roala mahlo a hau hantle. Ho sa tsotellehe hore na ho latela mekhoa ea feshene kapa ts'ebetso ea ts'ebetso, likhalase tsena tsa mahlo li tla finyella litlhoko tsa hau, li u lumella ho hlahisa kholiseho le ho khahleha ketsahalong efe kapa efe. Khetha lihlahisoa tsa rona ho boloka mahlo a hau a hlakile ebile a phutholohile ka linako tsohle!