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bit of guesswork maybe? I think saturn is dimming atm so i dont know if you could use any of its moons to focus off but thats what Id be trying for, i dont use sharpcap but firecap has a focus guide which works well for the given conditions at the time. I usually up the gain on a wide uncropped view of jupiter or asaturn and try to focus with some moons visible on screen. adjusting slightly with the focus helper too. Then adjust capture exposure settings. if seeing conditions are bad and I'm capturing a few multiminute batches to process I might refocus for each batch to try to make the most of changes in conditions. btw i dont use barlow as for me everything is too blurry regardless. after processing my pics sharpen up nicely even when capture looks blurry, trust in your process and get as good a focus as you can at the time is all you can do i think. I'm hoping to save for electric focuser so i dont wobble my rig.
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