{"id":8888,"date":"2014-08-10T14:08:46","date_gmt":"2014-08-10T11:08:46","guid":{"rendered":"http:\/\/www.keikari.com\/blogi\/?p=8888"},"modified":"2015-04-06T11:06:10","modified_gmt":"2015-04-06T08:06:10","slug":"p3-silmalasikehys","status":"publish","type":"post","link":"https:\/\/www.keikari.com\/blogi\/p3-silmalasikehys\/","title":{"rendered":"P3-silm\u00e4lasikehys"},"content":{"rendered":"<p>P3 on klassinen silm\u00e4lasikehys, joka muotoillaan jonnekin py\u00f6re\u00e4n ja ovaalin v\u00e4limaastoon. T\u00e4ss\u00e4 kehysmuodossa nen\u00e4n yl\u00e4puolella oleva silta on valettu tai kaiverrettu osaksi samaa palaa kuin linssej\u00e4 ymp\u00e4r\u00f6iv\u00e4 kehys. P3 ei yleens\u00e4 ole leve\u00e4, mutta se on kuitenkin tavallista korkeampi, ja kehyksen alaosa kaartuu voimakkaammin kuin yl\u00e4osa. Muodossa sek\u00e4 sangat ett\u00e4 kehysten reunat ovat ohuet, ja usein kehysten laidoissa on py\u00f6re\u00e4t metalliset kiinnikkeet, jotka toimivat my\u00f6s koristeina. Varhaisissa malleissa sangat liitettiin keskelle kehyksen reunaa ja sillan alla oli pehmusteet, my\u00f6hemmin sangat kohotettiin reunan yl\u00e4osaan ja pehmusteet katosivat joistakin versioista. Silta muotoillaan yleens\u00e4 avaimenrei\u00e4n n\u00e4k\u00f6iseksi.\u00a0British Optical Association Museumin kuraattori Neil Handley kertoo minulle, ett\u00e4 amerikkalaisen nimens\u00e4 kehys on saanut Yhdysvaltain armeijan varustoimikunnalta. Se jakoi likin\u00e4k\u00f6isille sotilaille t\u00e4m\u00e4nmuotoisia kehyksi\u00e4 Toisen maailmansodan aikana ja nimesi ne kuivasti.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8899\" title=\"P3-kehysmalli_Keikarissa\" src=\"http:\/\/www.keikari.com\/blogi\/wp-content\/kuvat\/2015\/04\/P3-kehysmalli_Keikarissa.jpg\" alt=\"\" width=\"1280\" height=\"869\" \/><\/p>\n<p>Britanniassa muoto kulkee nimell\u00e4 <em>panto <\/em>tai<em> PRO<\/em>. P3 on siis pantoskooppinen eli pituuspiirin luku, jossa linssin sivuttaisessa ja korkeusuuntaisessa kulmassa on kolmen millimetrin ero.\u00a0<span style=\"font-size: 14px; line-height: 1.625;\">P3:n kultakausi oli Amerikassa 1950-60 -luvuilla, kun yh\u00e4 useampi mieltyi sotamiesten kasvoilla n\u00e4kemiins\u00e4 kehyksiin ja valitsi saman mallin nen\u00e4lleen. Toinen suomenkielinen nimitys P3:lle on sarvisankakehys, sill\u00e4 ennen muoviteollisuuden edistyst\u00e4 suuri osa n\u00e4ist\u00e4 kehyksist\u00e4 luotiin naudansarvesta. Viel\u00e4 harvinaisempi materiaali oli kilpikonnan luinen kilpi, josta on syntynyt kolmas nimi, <\/span><em style=\"font-size: 14px; line-height: 1.625;\">tortoiseshell frames<\/em><span style=\"font-size: 14px; line-height: 1.625;\">. T\u00e4n\u00e4 p\u00e4iv\u00e4n\u00e4 suosituin materiaali on asetaatti, sill\u00e4 sarvikehys on herkk\u00e4 ja kilpikonniin ei en\u00e4\u00e4 saa kajota.<\/span><\/p>\n<p><a href=\"http:\/\/www.keikari.com\/blogi\/p3-silmalasikehys\/p3-kehysmalli_keikarissa2\/\" rel=\"attachment wp-att-8901\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8901\" title=\"P3-kehysmalli_Keikarissa2\" src=\"http:\/\/www.keikari.com\/blogi\/wp-content\/kuvat\/2015\/04\/P3-kehysmalli_Keikarissa2.jpg\" alt=\"\" width=\"1280\" height=\"739\" \/><\/a><\/p>\n<p>Sek\u00e4 sarvessa ett\u00e4 kilvess\u00e4 on luonnostaan kaunis ruskean s\u00e4vyiss\u00e4 vaihteleva v\u00e4ri, joka on suuri syy peekolmosen vieh\u00e4tykseen. T\u00e4st\u00e4 huolimatta kehysmallin voi luoda my\u00f6s metallista, ainoastaan muodolla on nimen kannalta v\u00e4li\u00e4. Kullan v\u00e4rinen metalli on ollut suositumpi kuin hopean v\u00e4rinen.\u00a0<span style=\"font-size: 14px; line-height: 1.625;\">Vanhoja valokuvia katsellessa huomaan P3:n olleen suosittu kirjailijoiden, lakimiesten, journalistien, arkkitehtien, akatemian ja muiden luovan alan miesten kasvoilla. Joukkoon tummaan mahtuu my\u00f6s poliitikkoja.<\/span><\/p>\n<p><a href=\"http:\/\/www.keikari.com\/blogi\/p3-silmalasikehys\/p3-kehysmalli_keikarissa3\/\" rel=\"attachment wp-att-8902\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8902\" title=\"P3-kehysmalli_Keikarissa3\" src=\"http:\/\/www.keikari.com\/blogi\/wp-content\/kuvat\/2015\/04\/P3-kehysmalli_Keikarissa3.jpg\" alt=\"\" width=\"1280\" height=\"837\" \/><\/a><\/p>\n<p><span style=\"font-size: 14px; line-height: 1.625;\">Nimien puolesta voin linkitt\u00e4\u00e4 <\/span><a style=\"font-size: 14px; line-height: 1.625;\" href=\"http:\/\/2.bp.blogspot.com\/_2nlbl7yHr3o\/TPlOGErhpYI\/AAAAAAAAAdI\/EitXV_-vpoo\/s1600\/rfkjfk.jpg\">John F. Kennedyn<\/a><span style=\"font-size: 14px; line-height: 1.625;\">, <\/span><a style=\"font-size: 14px; line-height: 1.625;\" href=\"http:\/\/theordinarypolitical.files.wordpress.com\/2010\/11\/harry-truman-picture.jpg\">Harry S. Trumanin<\/a><span style=\"font-size: 14px; line-height: 1.625;\">, <a href=\"http:\/\/38.media.tumblr.com\/25028cd89aa3f29b270e970c68a5d9a1\/tumblr_mf9ahzG7Oo1rv8zdao1_r3_500.jpg\">James Deanin<\/a>,\u00a0<\/span><a style=\"font-size: 14px; line-height: 1.625;\" href=\"http:\/\/blogs.reuters.com\/faithworld\/files\/2009\/11\/elbaradei.jpg\">Mohamed ElBaradein<\/a><span style=\"font-size: 14px; line-height: 1.625;\">, <\/span><a style=\"font-size: 14px; line-height: 1.625;\" href=\"http:\/\/assets.nydailynews.com\/polopoly_fs\/1.1153169!\/img\/httpImage\/image.jpg_gen\/derivatives\/landscape_635\/brokaw7n-1-web.jpg\">Tom Brokaw&#8217;n<\/a><span style=\"font-size: 14px; line-height: 1.625;\">, <\/span><a style=\"font-size: 14px; line-height: 1.625;\" href=\"http:\/\/thriftstorepreppy.files.wordpress.com\/2014\/01\/screen-shot-2014-01-06-at-12-19-56-am.png\">Arthur M. Schlesinger Juniorin<\/a>, <a href=\"http:\/\/www.interlingua.fi\/pthomi\/klinge1.jpg\">Matti Klingen<\/a><span style=\"font-size: 14px; line-height: 1.625;\">, presidentti <a href=\"http:\/\/upload.wikimedia.org\/wikipedia\/commons\/d\/d6\/Paasikivi_fi01_06a.jpg\">Paasikiven<\/a>\u00a0sek\u00e4 koko kansan <a href=\"http:\/\/www.taloussanomat.fi\/img.php?f=sammon_wahlroos.jpg&amp;w=800\">Bj\u00f6rn Wahlroosin<\/a><\/span><span style=\"font-size: 14px; line-height: 1.625;\">. Mielest\u00e4ni paras P3:n p\u00e4\u00e4v\u00e4riksi on tummanruskea, sill\u00e4 n\u00e4in kehys on sopivan tumma my\u00f6s juhlaan. Beige versio on parhaimmillaan kev\u00e4\u00e4n ja kes\u00e4n paisteessa. Laikukas, l\u00e4pikuultava ja ruskean eri s\u00e4vyiss\u00e4 vaihteleva kehys on my\u00f6s kiinnostava sek\u00e4 el\u00e4v\u00e4inen. T\u00e4ysmustana tai metallisena P3 menett\u00e4\u00e4 osan hohdostaan, vaikka muoto s\u00e4ilyy toki samana.<\/span><\/p>\n<p>K\u00e4tevin ja suurin l\u00f6yt\u00e4m\u00e4ni valikoima P3-kehyksi\u00e4 on amerikkalaisen Ben Silverin <a href=\"http:\/\/www.bensilver.com\/The-P3-Shape.html\">kokoelmassa<\/a>, josta omansa voi poimia monissa v\u00e4reiss\u00e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>P3 on klassinen silm\u00e4lasikehys, joka muotoillaan jonnekin py\u00f6re\u00e4n ja ovaalin v\u00e4limaastoon. T\u00e4ss\u00e4 kehysmuodossa nen\u00e4n yl\u00e4puolella oleva silta on valettu tai &#8230; <br \/><a class=\"more-link\" href=\"https:\/\/www.keikari.com\/blogi\/p3-silmalasikehys\/\">keep reading<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[10],"tags":[],"class_list":["post-8888","post","type-post","status-publish","format-standard","hentry","category-asusteet"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Ville Raivio\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.keikari.com\/blogi\/p3-silmalasikehys\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta 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