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My framerates are roughly 40 fps for Saturn, 70fps for Jupiter, 100fps for Mars just now. While I'm not sure that >100 is 'essential' (though why not if you have good image quality at your chosen image scale/gain/focal length combination and your usb can handle the bitrate), a significant increase on 30 is highly desirable. Mostly, you can push the gain a bit and shorten exposures and then get sharper images. I'd love to increase my Saturn framerates, but at my image scale it's not feasible (could do with a 1.5x Barlow!)
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