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Focus Ring Stops vs Continuous
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<blockquote data-quote="Clovishound" data-source="post: 810456" data-attributes="member: 50197"><p>Focusing on the moon, you should be able focus just fine in the viewfinder. If you are looking to expose the moon properly, rather than stars, there is plenty of light to be able to stop down to F11 give or take, which will give you enough depth of field to make up for any minor focusing error. </p><p></p><p>BTW, what are you using for exposure? You definitely don't want to be using autoexposure. For the moon you should start at F11 at 1/200 sec ISO 100. I would definitely put the camera in manual mode with manual ISO. Take a couple shots, look at them and adjust from there. You may have to give it a stop or two more. You should be able to see decent detail of moon craters. If you using autoexposure, it will grossly overexpose, trying to balance the scene between the bright moon and the black sky. </p><p></p><p>Here's one I took last year. I used my 200-500 on a full frame Nikon firmly attached to a tripod. It was shot at F11, 125th sec at ISO 200. Your 300mm on a crop frame sensor camera should give you an effective 450mm, not that much different from my 500mm. I did crop this image a good bit, but there was enough detail to sustain that.</p><p></p><p></p><p>[ATTACH=full]396039[/ATTACH]</p><p></p><p></p><p>Here's one I shot using aperture exposure. 1/20 sec at F6.7 ISO 800. It is properly focused, but doesn't look very sharp due to over exposure. It is probably about 7 stops overexposed, if my math is correct.</p><p></p><p></p><p>[ATTACH=full]396040[/ATTACH]</p></blockquote><p></p>
[QUOTE="Clovishound, post: 810456, member: 50197"] Focusing on the moon, you should be able focus just fine in the viewfinder. If you are looking to expose the moon properly, rather than stars, there is plenty of light to be able to stop down to F11 give or take, which will give you enough depth of field to make up for any minor focusing error. BTW, what are you using for exposure? You definitely don't want to be using autoexposure. For the moon you should start at F11 at 1/200 sec ISO 100. I would definitely put the camera in manual mode with manual ISO. Take a couple shots, look at them and adjust from there. You may have to give it a stop or two more. You should be able to see decent detail of moon craters. If you using autoexposure, it will grossly overexpose, trying to balance the scene between the bright moon and the black sky. Here's one I took last year. I used my 200-500 on a full frame Nikon firmly attached to a tripod. It was shot at F11, 125th sec at ISO 200. Your 300mm on a crop frame sensor camera should give you an effective 450mm, not that much different from my 500mm. I did crop this image a good bit, but there was enough detail to sustain that. [ATTACH type="full"]396039[/ATTACH] Here's one I shot using aperture exposure. 1/20 sec at F6.7 ISO 800. It is properly focused, but doesn't look very sharp due to over exposure. It is probably about 7 stops overexposed, if my math is correct. [ATTACH type="full"]396040[/ATTACH] [/QUOTE]
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