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General Photography
Low Light & Night
Star Photography One on One
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<blockquote data-quote="J-see" data-source="post: 392849" data-attributes="member: 31330"><p>Does anyone know how to calculate the exact shutter limit I can use with each lens/sensor?</p><p></p><p>I read about the <em>rule of 600</em> at the one place, the <em>rule of 500</em> at another yet none of them seems to be very correct in my case. I used the 18mm for 20s and even while that's just 360 and within range of both rules, when I check 1:1, I see the stars stretch. The full shot is ok but the moment I want to crop it's a no-go.</p><p></p><p>Strangely when shooting my 200mm at 2s shutter they're pretty ok even at 1:1.</p></blockquote><p></p>
[QUOTE="J-see, post: 392849, member: 31330"] Does anyone know how to calculate the exact shutter limit I can use with each lens/sensor? I read about the [I]rule of 600[/I] at the one place, the [I]rule of 500[/I] at another yet none of them seems to be very correct in my case. I used the 18mm for 20s and even while that's just 360 and within range of both rules, when I check 1:1, I see the stars stretch. The full shot is ok but the moment I want to crop it's a no-go. Strangely when shooting my 200mm at 2s shutter they're pretty ok even at 1:1. [/QUOTE]
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