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high shutter speed images

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Chippintuff:
Fantastic diagnostic tool.

WA

Zuma:

--- Quote from: aaron on December 12, 2017, 05:37:45 pm ---I have a new camera that has shutter speeds up to 1/16000ths. These are stills from 4k video shot at that speed. This may have use in tuning, as it shows the timing of arrow flex. I believe that the shutter is opening on the top first and scanning down leading to the unbalanced look of the string, limbs and fletching.

--- End quote ---
Just curious. Are the shingles on the house gable correct in the last photo. ???
I am not sure but if that is a distortion can it effect other parts of the photo??
I have seen a lot of similar distortion on older digital camera photos.???
Zuma

aaron:

--- Quote from: DC on December 13, 2017, 10:57:37 am ---That is really interesting. I'm glad you mentioned that it is scanning the picture(I didn't know they worked like that) as I would have thought that a lot of weird stuff was happening. I drew a couple of lines on the picture where I think think you released(top) and where the bow stopped (bottom). In between those lines is like a movie(sort of). If the shutter speed is 1 16,000 of a second does that mean that the time between the two lines is about 1 32,000 of a second? I noticed that the bottom limb looks straight on the inner half. Would that also be from the scanning?

--- End quote ---
yes, I think your're right-  that the lines you drew are 1/32,000ths apart, or the top line was recorded at one moment, and the bottom line was recorded about 1/32,oooths later. In other words, the very top of the photo was recorded when I was at the moment of release, while  the bottom part of the photo was recorded a bit later. By the time the bottom of the photo was recorded, the bow had almost reached brace. the straight section on the bottom limb could be caused by this I guess. If this is true, it tells us that a bow goes from full draw to brace in 1/16,000ths of a second give or take. If I had more math and less beer in me, I could check this against a ballpark speed of 125fps which is about what the bow probably shoots.

aaron:

--- Quote from: Zuma on December 13, 2017, 02:00:38 pm ---Just curious. Are the shingles on the house gable correct in the last photo. ???
I am not sure but if that is a distortion can it effect other parts of the photo??
I have seen a lot of similar distortion on older digital camera photos.???
Zuma

--- End quote ---
haha, no the shingles on the gable really do look like that!

DC:

--- Quote from: aaron on December 13, 2017, 07:26:49 pm ---
--- Quote from: DC on December 13, 2017, 10:57:37 am ---That is really interesting. I'm glad you mentioned that it is scanning the picture(I didn't know they worked like that) as I would have thought that a lot of weird stuff was happening. I drew a couple of lines on the picture where I think think you released(top) and where the bow stopped (bottom). In between those lines is like a movie(sort of). If the shutter speed is 1 16,000 of a second does that mean that the time between the two lines is about 1 32,000 of a second? I noticed that the bottom limb looks straight on the inner half. Would that also be from the scanning?

--- End quote ---
yes, I think your're right-  that the lines you drew are 1/32,000ths apart, or the top line was recorded at one moment, and the bottom line was recorded about 1/32,oooths later. In other words, the very top of the photo was recorded when I was at the moment of release, while  the bottom part of the photo was recorded a bit later. By the time the bottom of the photo was recorded, the bow had almost reached brace. the straight section on the bottom limb could be caused by this I guess. If this is true, it tells us that a bow goes from full draw to brace in 1/16,000ths of a second give or take. If I had more math and less beer in me, I could check this against a ballpark speed of 125fps which is about what the bow probably shoots.

--- End quote ---
I did some "rough" calculations and unless i made a mistake in 1/32,000 of a second the arrow would have only gone a half inch. It's gone about 8-10 inches in the picture. Something doesn't add up. Probably me.

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