Air Force the Official Service Journal - Air Force Historical Studies ...
Air Force the Official Service Journal - Air Force Historical Studies ...
Air Force the Official Service Journal - Air Force Historical Studies ...
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sharpness. But in tree-top Icvcl aerial<br />
photography, <strong>the</strong> sh u t tcrs of ,ingleexpos\Hc<br />
c.nncr.rx arc not fa,t cnollgh to<br />
stop <strong>the</strong> motion of tIle grolllld as it<br />
st rcakx past <strong>the</strong> lens,<br />
Ra<strong>the</strong>r th.m attempt to prodllce a<br />
,hntter that would ,top IIlotiolla mechn<br />
nical inlpm,ihilitl, since in hllge<br />
,Ierial CllIlcr:1\ thc shut tcr nui-! opcn<br />
and close mer .t n ,Ipc'rtmc fill' or six<br />
inches in di,lInder-- <strong>the</strong> enginecrs of<br />
\\'right licld» I'hotogLlphie lnbor.itorv,<br />
l':ngincering Diviviou, plnnged into <strong>the</strong><br />
clcvclopmcn t of ,I ,1JlIttcrlcss c.nncr.i in<br />
which <strong>the</strong> film woulcl 1I1o\'e :ICTOSS <strong>the</strong><br />
lens at <strong>the</strong> ,alllC Cite ,IS <strong>the</strong> im.rgc of<br />
objects on <strong>the</strong> grollnd moved past.<br />
The t.isk lIas to couvert <strong>the</strong> spas-<br />
modic film motion of <strong>the</strong> orcl iuarv<br />
,ingle-expm\He c.uucra to a -tcaclv, even<br />
flo\l',s~'lIchrolli/ed Ilith thc spceci of <strong>the</strong><br />
~ronnd helml, .vnd after mTreOlning<br />
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