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The imaging time changes a little. but your right that its practically the same.
6" 762mm vs 8" 1016mm = about 1.788x times the light collecting area but the image is 33.33% more zoomed in, so ends up about 0.5% brighter / less imaging time needed
Edit: I fogot that zoom deltas are a square. e.g. 5x zoom is 25x smaller area.
Last edited by Rerouter; 14-02-2021 at 03:23 PM.
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