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Old 06-05-2025, 11:00 PM
rac19 (Richard)
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Join Date: Sep 2016
Location: Sydney, Australia
Posts: 12
Quote:
Originally Posted by Camelopardalis View Post
Be careful to not get your Mb and MB confused

USB 3.0 is 5Gbps … 5000 megabits (Mb) per second => roughly 500 megabytes (MB) per second.

If your SSD is NVMe, then its write speed is likely 2100 megabytes (MB) per second … about 4 x more than the USB speed. While many SSD can’t sustain the maximum for long, the sustained speed is usually more than 1000MB/s.

Fwiw, I feel your pain… I tried a similar capture some years ago and got about 3 frames as the ISS passed over the Moon, and the camera was also a 1600 at max frame rate. It’s not an easy challenge
Yes, that very thing was niggling at me and I meant to check the Kingston data sheet but I didn't get around to it. It does say 2,100 MB/s which comfortably exceeds both the USB 3.0 cable rating and the maximum anvailble output from the camera.

The bottom line is that I can capture 16 MP at 22.5 FPS, a vast improvement on the 3 FPS that I was getting the other night. It means 20 images or so during a moon transit which will be much better. All I need now is another transit.
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