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So here's how it works:
> Turning the aperture ring raises the "Diaphragm Bar" behind the lens. At f/2.8 it's completely below the lens opening, and at f/22 it's just below the lens centerline.
> When the mirror rises, it drags this panel up with it; the odd shaped hole in the middle is the shutter opening. The mirror/shutter rises just as fast as its spring can whack it, and returns at the same speed as soon as it reaches the top.
> At f/2.8, the shutter is open for the entire distance of travel shown in green above - it takes about 1/60 second to cover this distance. But at f/22, with the DIaphragm Bar up where the purple line indicates, the shutter doesn't open until it reaches that line, and it closes as soon as it passes that line on the way down. The entire movement takes the same time as before, but the open time is only the time that it takes to travel the distance shown by the purple arrows. Assuming that the speed at f/2.8 was 1/60, this works out to about 1/500 second.
> The aperture at f/22 (and at all other settings except for f/2.8) is in the shape of a triangle with its point at the top - the top 2 sides are the edges of the "roof" part of the shutter opening, and the bottom side is provided by the Diaphragm bar.
It's actually just a little more complicated than this. In the above description, the f/22 opening is not centered on the same axis as the f/2.8 opening, and in fact if the Diaphragm Bar actually went as high as the purple line it would block off the center of the lens. So, in addition to all of the above, at the smaller apertures, the mirror/shutter is actually stopping its upward travel earlier than it does at full aperture. How does it do this? In the view of the Diaphragm Bar at www.flickr.com/photos/rick_oleson/53225547915/in/dateposted/, there is a second, gold colored bar that's coupled to the Diaphragm Bar, with a bent-up tab at its tip. As the Diaphragm Bar rises, this gold bar comes down - the tab at the end is the stop that the mirror strikes against to stop its upward travel. The two bars are coupled together so that the mirror's stopping position produces a centered triangular aperture opening at all settings. Dang.
Whoever did this will probably never be famous - but he was good.
The Revera and Reel Youth Age is More Film Project is an intergenerational partnership between Revera, a Canadian leader in seniors' accommodation, care and services, and Reel Youth, a charitable project that empowers youth to create engaging films about important social issues. The partnership was launched in 2013.
With 80 films to date, the program celebrates older Canadians through story-telling and film, with the added benefit of fostering new intergenerational relationships. The project aims to shed light on ageism, challenge the assumptions of aging and recognize the valuable contributions of older adults to society.
The Revera and Reel Youth Age is More Film Project is an intergenerational partnership between Revera, a Canadian leader in seniors' accommodation, care and services, and Reel Youth, a charitable project that empowers youth to create engaging films about important social issues. The partnership was launched in 2013.
With 80 films to date, the program celebrates older Canadians through story-telling and film, with the added benefit of fostering new intergenerational relationships. The project aims to shed light on ageism, challenge the assumptions of aging and recognize the valuable contributions of older adults to society.
The FIU Accounting Bridge program is a 2-day summer program for selected college-bound students. During the 2 days participants will have the opportunity to meet professionals who studied in accounting and now have lucrative, secure, and fascinating jobs.
Stencil for the graphic representation of Computer Programs
1960s or 1970s
Scanned with Canon LIDE110
© Dirk HR Spennemann 2014, All Rights Reserved
Access all my images via the Collections Page
The Thirty-Third Session of WIPO’s Program and Budget Committee (PBC) took place in Geneva from September 13 to September 17, 2021 in hybrid form – with delegates and observers attending physically in Geneva, Switzerland, and via remote participation from around the world.
Copyright: WIPO. Photo: Emmanuel Berrod. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO License.
It wasn't until just recently that I saw Tron Legacy and finally understood what the costumes these dancers wear in Electronica were supposed to be. Now that I know, I don't really care either way. I do like photographing them though.
Mavvo BiliÅŸim ve Bilgi Sistemleri
Yılların vermiş olduğu tecrübeyle kurulan Mavvo Bilişim vermiş olduğu yazılım ürünlerini geliştirme hizmetleriyle adından söz ettiriyor. Resmi web sitesi mavvo üzerinden vermiş oldukları sayısız hizmet seçeneklerine online olarak ulaşılıyor. İşletmelerin en çok tercih ettikleri ERP programı mobil cihazlardan, tabletlerden ve masa üstü bilgisayarlardan hızlı kullanım imkanı sağlıyor. Site geniş ürün yelpazesinde yer alan; pratik, kolay ve anlaşılır bir dilde yazılım ve bilişim sistemleri sayesinde, işletmenin daha aktif işlem yapmasına neden oluyor.
Hizmette Kalite
Mavvo bilişim ve bilgi sistemleri ailesi, işletmeler için sunduğu analitik muhasebe programı ile stok, cari hesap ve irsaliye düzenleme konusunda, programı tercih eden yetkililere, destek olarak çalışmalar yapıyor. Ayrıca zengin içeriğine sahip olan stok programı ile, işletme bünyesinde yer alan tüm malzemelere, araç gereçlere her daim hakim olunmasını sağlıyor. Kaliteli ve garanti belgesi olan paket programların satışını yapan Mavvo bilişim müşteri memnuniyeti odaklı hizmet veriyor.
Patent Ödülü
Uzun yıllardan bugüne teknolojik gelişmeleri takip eden Mavvo ailesi, vermiş olduğu nitelikli ve ideal hizmetler nedeniyle patent ödülü alarak faaliyetlerini sürdürüyor. İşletmelerin kobi gibi ihtiyaçlarında genç girişimcilerin ürettiği başarılı çözümler nedeniyle sektördeki liderliğini koruyor. Sunmuş olduğu hizmetlerde, server bağlantısı gibi prosedürlere ihtiyaç duyulmadan ve teknik bağlantıya gerek kalmadan, hızlı bir şekilde işlem yapılmasını sağlıyor. Kaliteli hizmet veren Mavvo ailesini, işletmeler güven içerisinde tercih ediyor.
9-5-13 A visit from Gail Storey, author of "I Promise Not To Suffer - A Fool for Love Hikes the Pacific Crest Trail"
Dance Programme on January 31, 2014 5:30 pm - 7:30 pm in Vivekananda Auditorium, Ramakrishna Mission, Delhi.
Performed by children of Sri Nruthya Kala Nilayam, Anantpur, Andhra Pradesh.
Jean Kellogg, Merola Executive Director, Joan Kelly, James Kelly
Spring Benefit Gala 2015
A Waltz Down the Blue Danube
Photography by Kristen Loken
Jean Kellogg, Merola Executive Director, Joan Kelly
Spring Benefit Gala 2015
A Waltz Down the Blue Danube
Photography by Kristen Loken
Purple wedding program on purple mums
Ceremony
Colonial Avenue Baptist Church
Roanoke, Virginia
Reception
Holiday Inn Valley View
Roanoke Virginia
Wedding Coordination
Diamond Events
Stephanie Hughes
540-558-8143
DJ
RSP Entertainment
Photographer
Bert Reed Photography
Florist
Petal Pushers
Cake Baker
Kelly Cakes
Susan Kelly
(540) 977-5349
This is what I'm doing at work for the last 2 weeks, coding and coding.
Esto es lo que estoy haciendo en el curro estas últimas 2 semanas, picar y picar codigo
The 2012 U.S. Synchronized Skating Championships hosted by The Skating Club of Boston and Team Excel
Second version of the PF powered train, controlled by an Mindstorms EV3.
In the previous version, it was not possible to access the charging plug at all. Making it impossible to recharge the battery.
In this version, this problem has been solved. The access to the charging plug is now under the easy-to-remove roof of the train.
In this photo you see the power cable connected.
Darrell Zechman, program director, UChicago Careers in Business & UChicago Careers in Business: Financial Markets, gives opening remarks before students from around the nation begin the inaugural Midwest Trading Competition at the Gleacher Center on Saturday, Apr. 13, 2013 in Chicago. (Photo by Joel Wintermantle)
The complete theatre program for Sydney Theatre Company's production of Hedda Gabler as presented at the Brooklyn Academy of Music, February-March 2006. The production starred Cate Blanchett and Hugo Weaving.
Student volunteers from Thomas Nelson Community College biology classes spend their Saturday morning participating in International Coastal Cleanup day at Dandy Haven Marine in Hampton, VA on Oct 19, 2019.
Virginia Institute of Marine Science's Marine Advisory Program and Virginia Sea Grant are proud partners in the Virginia Clean Marina Program, which recognizes marinas that voluntarily take measures to prevent or reduce pollution at their facilities.
(Photo by Aileen Devlin | Virginia Sea Grant)