{"id":1404,"date":"2022-10-27T10:43:08","date_gmt":"2022-10-27T17:43:08","guid":{"rendered":"https:\/\/cinemagear.com\/blog\/?p=1404"},"modified":"2022-10-27T10:43:08","modified_gmt":"2022-10-27T17:43:08","slug":"correcting-the-18mm-red-prime-pl-mount","status":"publish","type":"post","link":"https:\/\/cinemagear.com\/blog\/2022\/10\/27\/correcting-the-18mm-red-prime-pl-mount\/","title":{"rendered":"Correcting the 18mm RED Prime PL Mount"},"content":{"rendered":"\n

I was talking to a cinematographer friend of mine who reminded me that, quite a number of years ago, I modified his RED Prime 18mm lens so it would work on his PL mounted MovieCam without crashing into the mirror. It seemed fitting to pass on what I did and do the same modification on the 18mm I recently acquired. The problem isn\u2019t that the rear element sticks back into the camera too far, but rather that there is a beauty ring that is threaded into the PL mount itself that is both too long and beveled at the wrong angle. To refresh my memory, I began by carefully comparing the PL mounts on the other RED Prime lenses that work on film cameras to the PL mount on the 18mm to determine the exact amount that needs to be removed from the beauty ring.<\/p>\n\n\n\n

\n
\"A<\/a><\/figure>\n\n\n\n
\"Close-up<\/a><\/figure>\n\n\n\n
\"The<\/a><\/figure>\n<\/figure>\n\n\n\n

All of that data gathered, I removed the PL mount from the 18mm, mounted it on the lathe, indicated the mount true and parallel, and machined it to the correct height and 45 degree bevel. I blackened it with aluminum blackening compound so it matched the rest of the lens set, reinstalled the mount, recollumiated the lens, and tried it on what I thought would be the worst case scenario, an Arri 2B that had been converted to PL mount. (I know this has a 2C door, I converted this 2B camera to have a 2C door on it years ago.) I pulled the aperture plate out of the 2B, slowly rotated the mirror by hand to make sure everything cleared as I calculated, and voil\u00e1! An 18mm RED Prime that will work with a film camera!<\/p>\n\n\n\n

\n
\"Setup<\/a><\/figure>\n\n\n\n
\"Machining<\/a><\/figure>\n\n\n\n
\"A<\/a><\/figure>\n\n\n\n
\"PL<\/a><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"

I was talking to a cinematographer friend of mine who reminded me that, quite a number of years ago, I modified his RED Prime 18mm lens so it would work on his PL mounted MovieCam without crashing into the mirror. It seemed fitting to pass on what I did and do the same modification on […]<\/p>\n","protected":false},"author":1,"featured_media":1402,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[6],"tags":[85,15,61,172],"class_list":["post-1404","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lenses","tag-arri","tag-arriflex","tag-prime-lens","tag-red"],"_links":{"self":[{"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/posts\/1404","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/comments?post=1404"}],"version-history":[{"count":1,"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/posts\/1404\/revisions"}],"predecessor-version":[{"id":1405,"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/posts\/1404\/revisions\/1405"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/media\/1402"}],"wp:attachment":[{"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/media?parent=1404"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/categories?post=1404"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cinemagear.com\/blog\/wp-json\/wp\/v2\/tags?post=1404"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}