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| 01/22/2015 02:22:36 PM |
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| 01/21/2015 04:56:09 PM |
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| 01/21/2015 01:37:19 PM |
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| 01/21/2015 12:05:55 PM |
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| 01/19/2015 03:56:10 PM |
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| 01/19/2015 03:34:03 PM |
Roaring 20sby giantmikeComment by GeneralE: Originally posted by damjanev: 78 RPM = 1.3 Hz (rotations per second). That's 3/4 seconds for a full record rotation. Given my initial estimate of 1/16th of a full circle recorded, the exposure time would be 3/64 seconds, which is approximately 1/22 seconds. |
Which is pretty close to the stated time of 1/20. :-)
I know someone with an Edison player -- I'll have to keep it in mind for a future challenge ... |
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| 01/19/2015 07:23:16 AM |
Roaring 20sby giantmikeComment by damjanev: Did anyone noticed my blatant mistake in the math? I was writing RPM, but calculating Hz. It didn't even ring any bells after the final result was 1/1250, which is way too short.
Let's fix it. 78 RPM = 1.3 Hz (rotations per second). That's 3/4 seconds for a full record rotation. Given my initial estimate of 1/16th of a full circle recorded, the exposure time would be 3/64 seconds, which is approximately 1/22 seconds.
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Photographer found comment helpful. |
| 01/18/2015 06:54:13 PM |
Roaring 20sby giantmikeComment by JakeKurdsjuk: Wish you'd done a little work in post on the Silvertone ring. Needs a little more detail lost in the highlights. Love the rest of it. |
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| 01/18/2015 09:47:39 AM |
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| 01/17/2015 07:47:34 AM |
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