Video astronomy is very helpful to those like myself who have had eye operations leading to lumps of vitreous humour ( not a pun) floating in their vision. Small exit pupil views through a telescope at high magnification gives a view with moving tentacular bodies in the field. Then at the other extreme severe astigmatism causes itscown viewing problems. All of these problems are overcome with the enhanced views of a video camera and video screen. I know of lunar observers who find it helpful to draw lunar pictures using video capture devices.
Philip
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