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So what lens to shoot the moon?
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<blockquote data-quote="WayneF" data-source="post: 672879" data-attributes="member: 12496"><p>You can of course crop your moon image much more tightly, to eliminate the blank black space.</p><p></p><p>There is a calculator at <a href="https://www.scantips.com/lights/stars.html" target="_blank">https://www.scantips.com/lights/stars.html</a></p><p></p><p>It is for computing blur trail of longer stellar exposures on a fixed mount. The moon is lighted by direct sun, and needs only more normal daylight exposures, so that is not really applicable here, BUT the last lines of this calculator result is like:</p><p></p><p>Angular dimension for this sensor and lens:</p><p> 4.1253 arcseconds per pixel, 873 pixels per degree (if < 10°)</p><p></p><p>The image dimension in degrees is valid for any exposure time, but varies with focal length and sensor size. But it does show what object size to expect with the focal length AND SENSOR SIZE (both mm and pixels). This text example above is a 200 mm lens and a 24 megapixel <strong>DX</strong> sensor. The image example below is a FX sensor.</p><p></p><p>The moon size is 0.5 degrees, so in this text example result of 873 pixels per degree, the moon would be half that size in the image, which is a small image, but still perhaps suitable for video monitor viewing.</p><p></p><p>This image is a 600 mm lens on D800 (36 megapixel FX): f/8, 1/200 second, ISO 320. </p><p>The motion blur trail of 0.005 seconds is negligible (0.02 pixels in this case).</p><p>The Moon's reflectivity (albedo) is 12%, so it should look middle gray dark, not white.</p><p></p><p><img src="http://www.scantips.com/g2/moon.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="WayneF, post: 672879, member: 12496"] You can of course crop your moon image much more tightly, to eliminate the blank black space. There is a calculator at [URL]https://www.scantips.com/lights/stars.html[/URL] It is for computing blur trail of longer stellar exposures on a fixed mount. The moon is lighted by direct sun, and needs only more normal daylight exposures, so that is not really applicable here, BUT the last lines of this calculator result is like: Angular dimension for this sensor and lens: 4.1253 arcseconds per pixel, 873 pixels per degree (if < 10°) The image dimension in degrees is valid for any exposure time, but varies with focal length and sensor size. But it does show what object size to expect with the focal length AND SENSOR SIZE (both mm and pixels). This text example above is a 200 mm lens and a 24 megapixel [B]DX[/B] sensor. The image example below is a FX sensor. The moon size is 0.5 degrees, so in this text example result of 873 pixels per degree, the moon would be half that size in the image, which is a small image, but still perhaps suitable for video monitor viewing. This image is a 600 mm lens on D800 (36 megapixel FX): f/8, 1/200 second, ISO 320. The motion blur trail of 0.005 seconds is negligible (0.02 pixels in this case). The Moon's reflectivity (albedo) is 12%, so it should look middle gray dark, not white. [IMG]http://www.scantips.com/g2/moon.jpg[/IMG] [/QUOTE]
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So what lens to shoot the moon?
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