https:\/\/en.m.wikipedia.org\/wiki\/CR-39<\/a>
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nFirst camera filter made of high quality 100%\noptical resin material CR-39 using nano technology. The most neutral camera\nfilters in the market, more scratch resistant, more fingerprint, water and oil\nresistant, with better UV and IR coating as well as antistatic and antifog\ncoating. The filters are easy to clean, perfectly colour neutral and shock\nresistant. Scratches do not necessarily affect the performance of the filter\nbecause the pigments are not applied only to the surface of the filter as in\nthe case of glass filters, instead, all our filters are bulk tinted. Light\nscratches are therefore not visible in the captured images. Perfect results are\nalso guaranteed when combining various filters.Optical properties:0.9 optical density, 12.5% of light transmittance in the darkest area, 3F stops light reduction. Optical density tolerance:+\/- 1%.Generally about REVERSED GRADUATED ND filters\/<\/p>
Use: REVERSED GRADUATED ND filters have\nvariable density throughout filter space (soft transition from light to dark\nfollowed by hard transition from dark to light). This means that the amount of\nlight coming into the camera is reduced gradually. This is very useful in\nsituations when some parts of the photograph are overexposed (the sky is too\nbright - especially at sunsets and sunrises). REVERSED GRADUATED ND filters can\nbe used in combination with full or graduated filters. Example of density in\nstacking mode: ND8 filter + ND4 filter equals to ND32 filter (density is\nmultiplied). <\/p>
\nPrv\u00fd kamerov\u00fd filter vyroben\u00fd\n z vysoko kvalitn\u00e9ho 100% optick\u00e9ho materi\u00e1lu
CR39<\/span> s pou\u017eit\u00edm\n NANO technol\u00f3gie. Najneutr\u00e1lnej\u0161\u00ed kamerov\u00fd filter na trhu- je odolnej\u0161\u00ed proti\n po\u0161kriabaniu-Obsahuje viac UV a IR pr\u00edmes\u00ed-Eliminuje odtla\u010dky\n prstov-Odolnej\u0161\u00ed vo\u010di vode a mastn\u00fdm l\u00e1tkam-Antistatick\u00fd a\n o\u0161etren\u00fd proti zahmlievaniu-\u013dahko \u010distite\u013en\u00fd, absol\u00fatne \u010dierny\n - odoln\u00fd proti n\u00e1razu. Pri n\u00e1raze alebo po\u0161kriaban\u00ed je\n pou\u017eite\u013enos\u0165 filtrov bezprobl\u00e9mov\u00e1 najm\u00e4 z jedn\u00e9ho d\u00f4vodu: FARBU\n pri v\u00fdrobe filtrov neaplikujeme len na povrch, ako je vidie\u0165 na\n sklenen\u00fdch filtroch, ale aj do vn\u00fatra celej hr\u00fabky materi\u00e1lu. Ak\n sa aj vyskytn\u00fa mal\u00e9 vlasov\u00e9 \u0161krabance , tie neovplyvnia \u00fa\u010dinnos\u0165\n filtra (pri v\u00fdsledn\u00fdch z\u00e1beroch to nie je vidite\u013en\u00e9).Ve\u013emi dobr\u00fd\n v\u00fdsledok je zaru\u010den\u00fd aj pri kombin\u00e1cii r\u00f4znych typov filtrov a\n r\u00f4znych zna\u010diek.Materi\u00e1l: 100% vysoko kvalitn\u00e1 optick\u00e1 \u017eivica CR39.Optick\u00e9 vlastnosti: 0,9 optick\u00e1 hustota, 12,5% priepustnos\u0165 svetla v najtmav\u0161ej oblasti, 3F stops.Tolerancia optickej hustoty: +\/- 1%. V\u0161eobecne o filtroch \/ pou\u017eitie REVERSED prechodov\u00e9 ND Filtre maj\u00fa v celom priestore filtra r\u00f4znu hustotu (m\u00e4kk\u00fd prechod zo svetlej \u010dasti do tmavej, potom tvrd\u00fd prechod z tmavej do svetlej \u010dasti). To znamen\u00e1, \u017ee svetlo prich\u00e1dzaj\u00face do kamery sa postupne zni\u017euje. Ak je fotografia preexponovan\u00e1 (pr\u00edli\u0161 ve\u013ea jasnej oblohy - najm\u00e4 na z\u00e1pad slnka a v\u00fdchod slnka) .Reverzn\u00e9 prechodov\u00e9 ND filtre je mo\u017en\u00e9 pou\u017e\u00edva\u0165 s pln\u00fdmi alebo prechodov\u00fdmi filtrami v stohovacom re\u017eime. Hustota v stohovacom re\u017eime Pr\u00edklad: ND8 filter + ND4 filter sa rovn\u00e1 ND32 filter (hustota sa vyn\u00e1sob\u00ed).
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