low light photography for dummies

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    LET THERE BE MORE

    LIGHTEugene V. Bobukh

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    To Make This Presentation( !"#$%&'

    About 70 hours were forever lost forFacebook

    6.2 Gb of disk sace was occuied !00" hotos were taken # $ % drinking arties were &issed' (o )*& glad that +ou*ve &ade it here

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    is)*ai+er( !"#$%&'

    ,his is not a for&al hotograh+course

    ) a& not a rofessional (o ) can do it -ust however it leases &e

    )f +ou don*t like &+ st+le/ hire a ro for1

    ) will notcover &an+ ver+ i&ortant

    things (uch as laws of co&osition or studiosetu

    ) a& -ust an e34h+sicist who*s doneso&e #00/000 hotos in )5/ visual/ V/

    VV and 5A8

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    ,But Bugs Are (till :ossible)f +ou sot ;e&/ reort ;e&'

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    -. .O/ /HE.E0ER1BO123 RE-1

    ?@CD/ ?HIJ

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    The 0er4 5irst Photo

    KL!26

    MView fro& theNindow at OeGras< b+ Poseh

    QicRhore QiRce

    ,aken on bitu&enas a &edia

    ! hours e3osure

    Slearl+/ therewas not enoughlight

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    3in)e Then

    :hotograh+ has gone a long/ long wa+T Tbut there is still often not enough light

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    6ten7 /e 3ee 3o+ethin8 Like That

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    -n9 It T:rns O:t LikeThat

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    Ho; o /e Make It Better?B-3I@ THEOR1:ractice without a theor+ is like wine without a toast'

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    @a+era isse)te9

    5ealit+ is Ttough'

    Ne need asi&ler &odel toget the essenceof the rocess

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    - 3Aheri)a* @a+era in 0a)::+

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    r

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    3 LWXLWF Y LWUZb a[X3WUZ

    suall+ U 11 F/ so 3 \ F and b \ a[XFWUZ

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    EAos:re (3h:tter 3Aee97CD$!F'

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    b

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    ,+ical ,] LWL%thY LW%00thof a second Xdenoted as

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    -Aert:re ("JK'

    rF

    Oight co&es fro& all directions. ^hotons cross each &2of a surface near

    the ca&era

    _ow &an+ hotons get inside` ^[r2

    ,he+ are ro-ected on the focushe&ishere with the area ( 2F2

    :hotons count er &2of the inner i&ageis B W( ^[XrWFZ2

    Intro9:)e . 5>r

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    ,hen B p^WQ2

    Oenses with the sa&e Q roduce i&ages

    of the sa&e brightness regardless of thefocal length['

    Bear ;ith +eN

    This is the +ost )o+A*e +ath o6 the;ho*e Aresentation

    The rest ;i** e easier I Aro+ise

    3ta4 t:ne9N

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    -t 5>Q?7 The4 -** -re The 3a+eN

    9/ onl+ brightness is the sa&e. Al&ost.

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    CGates OAene9 4 the .tho6 the5o)a* Len8thF

    U FWL6 U FW% U FWL.$

    1 1 1 1 icture brightness 1 1 1 1

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    The *esser .7 the ri8hter thei+a8e

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    E.OGH THEOR1 5OR.O/

    A ractical roble&]

    )t is too dark._ow do +ou let &ore light in`

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    .e; Gates 34n9ro+e

    _ow do +ou let &ore shee in`

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    T;o OAtions

    L. ee the gates oen longer )ncreaseE3osure

    2. 9en the& wider 5educe Aerture

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    P-RT >?ESPO3RE

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    In)rease 3h:tter Ti+e?-PERTRE

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    Re+e+er< Bri8htness c =>.

    ,he a&ount of light is roortional to

    the inverse sd:areof the F4nu&ber'

    ,his is a serious businessore serious that UoF K Q

    (o Srank the Oens 9en'

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    5`n:+er an9 Bri8htness-Aert:re Bri8htnes

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