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No, I haven't worked out the actual magnification yet, I need to know how to measure the size of jupiter's width in pixels. My guess would be if I'm using the 640x480 crop mode, then the width of the screen would be 640 pixels, and I could measure the size of jupiter and work it out as a percentage of that? But that might not be right, and there might be a better way to do it. Size of planet in arcsec I should be able to look up.
I also found another way to get an extension in there. I unscrewed the lens out of a 2x barlow, leaving the hollow tube, and the 3x barlow fits onto that nicely. I think this would get me pretty close to where it needs to be.
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