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<blockquote data-quote="Exodist" data-source="post: 1604159" data-attributes="member: 284358"><p>Good info Nick..</p><p></p><p>Just to piggy back on this, keep in mind even though its night outside, the moon is in daylight since the sun is shinning on it in full force. </p><p> </p><p>I personally set my shutter speed to exceed my focal length. Say a 300mm lens at 300mm on a Canon Rebel series up to the 70D and 7D are all cropped sensor cameras and 1.6 ratio in size. So you say 300mm x 1.6(Canon), 1.5x(Nikon) and gets you 480mm(Canon) and 450mmm(Nikon) equivalent. So you want to set your shutter speed to 1/500sec to prevent camera shake. This however doesnt take into consideration of Image Stabilization, which can allows you to shoot at slower shutter speeds and still get sharp images. I have the lens you mentioned and its IS/OS is about 2 stops at most. So you can go down to 1/250 sec, but I would keep it at 1/500 just in case. </p><p></p><p>The aperture since you shooting at such at long distance is not as important as your not worried about a Depth of Field when shooting the Moon and Stars. However Aperture still can effect your lens sharpness. On this particular lens f/6.3 and f/7.1 are you sweet spots for sharp images. But you can go down to as small as f/11 as Nicky mentioned, but I would not go any smaller as you image quality will start to drop quickly.</p><p></p><p>As far as ISO, ISO100 should be all you need since the moon is in daylight.. I would prioritize opening the aperture up to the max f/6.3 on that lens before raising the iso any at all.</p><p></p><p>Another quick tip is to use your center focusing pixel on your camera, but if you camera happens to act silly and not want to focus (which is shouldn't) just set your lens to the Infinity Mark. Sigma sets their focal markings on their lens at the tele end. So you will find your infinity mark is fairly accurate at the tele end, but not at all on the wide end.</p><p></p><p>Hope this helps.</p></blockquote><p></p>
[QUOTE="Exodist, post: 1604159, member: 284358"] Good info Nick.. Just to piggy back on this, keep in mind even though its night outside, the moon is in daylight since the sun is shinning on it in full force. I personally set my shutter speed to exceed my focal length. Say a 300mm lens at 300mm on a Canon Rebel series up to the 70D and 7D are all cropped sensor cameras and 1.6 ratio in size. So you say 300mm x 1.6(Canon), 1.5x(Nikon) and gets you 480mm(Canon) and 450mmm(Nikon) equivalent. So you want to set your shutter speed to 1/500sec to prevent camera shake. This however doesnt take into consideration of Image Stabilization, which can allows you to shoot at slower shutter speeds and still get sharp images. I have the lens you mentioned and its IS/OS is about 2 stops at most. So you can go down to 1/250 sec, but I would keep it at 1/500 just in case. The aperture since you shooting at such at long distance is not as important as your not worried about a Depth of Field when shooting the Moon and Stars. However Aperture still can effect your lens sharpness. On this particular lens f/6.3 and f/7.1 are you sweet spots for sharp images. But you can go down to as small as f/11 as Nicky mentioned, but I would not go any smaller as you image quality will start to drop quickly. As far as ISO, ISO100 should be all you need since the moon is in daylight.. I would prioritize opening the aperture up to the max f/6.3 on that lens before raising the iso any at all. Another quick tip is to use your center focusing pixel on your camera, but if you camera happens to act silly and not want to focus (which is shouldn't) just set your lens to the Infinity Mark. Sigma sets their focal markings on their lens at the tele end. So you will find your infinity mark is fairly accurate at the tele end, but not at all on the wide end. Hope this helps. [/QUOTE]
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