{"id":887,"date":"2018-08-09T11:45:18","date_gmt":"2018-08-09T16:45:18","guid":{"rendered":"https:\/\/markgunterphotography.com\/abo\/?p=887"},"modified":"2018-08-08T12:40:32","modified_gmt":"2018-08-08T17:40:32","slug":"thorium-tinted-takumar-50mm-lens","status":"publish","type":"post","link":"https:\/\/markgunterphotography.com\/abo\/thorium-tinted-takumar-50mm-lens\/","title":{"rendered":"Treating a Thorium-Tinted Takumar 50mm Lens"},"content":{"rendered":"<p>Let&#8217;s take a quick trip back to my <a href=\"https:\/\/markgunterphotography.com\/abo\/old-lenses-adapters-m42-eos\/\" target=\"_blank\" rel=\"noopener\">old lenses<\/a>, shall we? I have been playing with them quite a bit lately. The <a href=\"https:\/\/www.ebay.com\/itm\/M42-Lens-to-Canon-EOS-EF-AF-Confirm-Adapter\/323313816763?ssPageName=STRK%3AMEBIDX%3AIT&amp;_trksid=p2057872.m2749.l2649\" target=\"_blank\" rel=\"noopener\">M42-EOS adapter with a confirm chip<\/a>\u00a0has helped keep my focus on point and made a big difference in how this one-eyed photographer shoots with them. My favorite lens has been the Super-Takumar 50mm f\/1.4. It has proven to be tack sharp (once properly focused) while giving a nice vintage vibe that I&#8217;m not getting from my modern lenses.<\/p>\n<p>The <a href=\"https:\/\/www.pentaxforums.com\/lensreviews\/SMC-S-M-C-Super-Takumar-50mm-F1.4.html\" target=\"_blank\" rel=\"noopener\">Super-Takumar 50mm f1.4<\/a> has an interesting history. My particular copy is from 1971 or earlier but, given the provenance, I&#8217;m guessing no later than 1968. This is a lens my father used while on active duty following the <a href=\"https:\/\/www.history.com\/this-day-in-history\/uss-pueblo-captured\" target=\"_blank\" rel=\"noopener\">Pueblo Incident<\/a>. The fun part of this lens is that it yellows with age. <a href=\"http:\/\/www.world-nuclear.org\/information-library\/current-and-future-generation\/thorium.aspx\" target=\"_blank\" rel=\"noopener\">Thorium<\/a> was used on the rear lens element. It is radioactive and, as it decays, effects the glass. The more I used the lens, the more I argued the wisdom of trying the easy, home-remedy to clear the yellow tint. Part of me liked the yellowing which, in my mind, mimics the yellowing of old photographs. But if this lens is this much fun yellow, what can I do with it clear?<\/p>\n<p>I followed the general instructions online: Expose the lens to UV light to make the yellow tint go away. Wrapping it in aluminum foil, I placed it in the back yard to suck up the brilliant, Oklahoma sun. The foil served two purposes. First, it helps prevent the black lens from getting overly hot. Second, it helps the sunlight reflect back through the lens, hopefully helping &#8220;bake&#8221; the yellow a little faster. The important part is to have the aperture wide open and be patient.<\/p>\n<p>On that note, it is time to be patient. The lens is in place and I&#8217;m checking it on occasion to make sure it is getting good light. Initial results seem to be promising. More news when the lens is finished baking!<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Let&#8217;s take a quick trip back to my old lenses, shall we? I have been playing with them quite a&#8230;<\/p>\n","protected":false},"author":1,"featured_media":888,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[12,29],"tags":[],"class_list":["post-887","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-business","category-gear","wpcat-12-id","wpcat-29-id"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Treating a Thorium-Tinted Takumar 50mm Lens &#8226; Anything But Ordinary<\/title>\n<meta name=\"description\" content=\"After getting an adapter with focus confirmation for a Super-Takumar 50mm lens, it quickly grew on me. 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