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<head>
<meta charset="utf-8">
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<title></title>
<meta name="description" content="">
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<link rel="stylesheet" href="css/style.css">
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</head>
<body>
<SCRIPT LANGUAGE="JavaScript">
function tt (form){
x = Math.pow(form.aperture.value,2);
y = Math.pow(2,form.EV.value);
iso = (document.form.iso.options[document.form.iso.selectedIndex].value);
if (parseInt(form.shutter.value, 10) <=1)
{
form.shutter.value = "1/" + (Math.round ((1/(x/y))*(iso)*1000)/1024) + " th sec";
console.log(x/y);
}
else {form.shutter.value = (Math.round (x/y*10)/10*(iso)) + " sec";
console.log(x/y);
}
}
</script>
<div id="container">
<header>
</header>
<div id="main" role="main">
<form method=post name=form>
<select name=aperture>
<option value="1">f/1</option>
<option value="1.4">f/1.4</option>
<option value="2">f/2</option>
<option value="2.8">f/2.8</option>
<option value="4">f/4</option>
<option value="5.6">f/5.6</option>
<option value="8">f/8</option>
<option value="11">f/11</option>
<option value="16" selected>f/16</option>
<option value="22">f/22</option>
<option value="32">f/32</option>
<option value="45">f/45</option>
<option value="64">f/64</option>
</select>
<!--<select name=shutter>
<option value=".00208">8min </option>
<option value=".00417">4min </option>
<option value=".00833">2min </option>
<option value=".0166">1min </option>
<option value=".0333">30s </option>
<option value=".0666">15s </option>
<option value=".125">8s </option>
<option value=".25">4s </option>
<option value=".5">2s </option>
<option value="1">1s </option>
<option value="2">1/2s </option>
<option value="4">1/4s </option>
<option value="8">1/8s </option>
<option value="15">1/15s </option>
<option value="30">1/30s </option>
<option value="60">1/60s </option>
<option value="125" selected>1/125s </option>
<option value="250">1/250s </option>
<option value="500">1/500s </option>
<option value="1000">1/1000s </option>
<option value="2000">1/2000s </option>
<option value="4000">1/4000s </option>
<option value="8000">1/8000s </option>
</select>
-->
<select name=iso>
<option value="32">ISO 3200</option>
<option value="16">ISO 1600</option>
<option value="8">ISO 800</option>
<option value="4">ISO 400</option>
<option value="2">ISO 200</option>
<option value="1" selected>ISO 100</option>
<option value=".5">ISO 50</option>
<option value=".25">ISO 25</option>
</select>
<input name="shutter" type="text" value="" size="12" maxlength="5">
<select name=EV>
<option value="2">EV 2</option>
<option value="3">EV 3</option>
<option value="4">EV 4</option>
<option value="5">EV 5</option>
<option value="6">EV 6</option>
<option value="7">EV 7 </option>
<option value="8">EV 8</option>
<option value="9">EV 9</option>
<option value="10">EV 10</option>
<option value="11">EV 11</option>
<option value="12">EV 12</option>
<option value="13">EV 13</option>
<option value="14">EV 14</option>
<option value="15" selected>EV 15</option>
<option value="16">EV 16</option>
<option value="17">EV 17</option>
</select>
<input value=" Calculate shutter" onclick="tt(this.form)" type="button">
<button class="button_x" type="reset">x</button>
</form>
</div>
<footer>
</footer>
</div> <!--! end of #container -->
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</body>
</html>