All astronomical telescopes show images upside down. You can buy an "erecting prism diagonal" for terrestrial viewing.
Remember --- no up or down in space, and you would need to add more glass to "erect" the image.... more glass usually means reduced light throughput, at the eyepiece.
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All astronomical telescopes show images upside down. You can buy an "erecting prism diagonal" for terrestrial viewing.
Remember --- no up or down in space, and you would need to add more glass to "erect" the image.... more glass usually means reduced light throughput, at the eyepiece.