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Chronos User Discussion / Re: Extracting still images
« on: May 02, 2020, 06:54:54 PM »"The 2.1 can shoot with exposures down to a micro second. I just tested it."
I've pretty much decided that I am going to buy one of the cameras. The datasheet for the 2.1 says that the minimum exposure time is 10 microseconds and not 1 microsecond. Would you please confirm that you were able to get 1 microsecond?
Also, is the fps really limited to 24,046 per the datasheet? It seems odd for a higher resolution camera and given that the initial announcements for the 2.1 said the camera would be able to shoot 100K fps.
Thanks.
To test the 1 microsecond exposure I shot a 260mm diameter saw blade doing roughly 1800rpm.
To test the timing using household equipment only, I compared the distance between frames at 24000fps with the motion blur of the exposure at 1us.
jpeg of frame sequence attached
I know that this relies on the same piece of kit to both test and measure, but no-one is questioning the frame rates.
Looks good to me.
I also shot at 5000fps and got the same result, but there is no usable sequence at this micro scale, jpeg attached.