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The 30 minute subs were at F10 - 2.3 metre focal length to see what my mount could achieve - stars were round but a tad bloated to say the least - but it gave me an idea of what Vixen Atlux could do carrying three scopes and five cameras.
With more sensitive and cooled ZWO cameras generally 3 mins to 6 mins is fine. But the key question is how to best tune my gear - and I think as ever experiment and collect data!
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