- #211
sophiecentaur
Science Advisor
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Yes, For a start, the Sun would move across the horizon very fast if a large, distant occluding disc were used and that would need tracking. I used to have a photograph of my son, standing on a wall with a beachball held overhead and producing a pretty good eclipse. I had to do a lot of "forward backward side to side" to make it work. Then I lost the print! baah.neilparker62 said:not very amenable to DIY solutions.
An internal occluding disc would not have the same problems but some fancy optics would be needed to place the Sun image (exactly the right size, of course) at an intermediate focus and then another lens, to project (in focus) both the Sun and the Disc onto the image sensor. Not too hard if you have a selection of appropriate lenses and extension tubes.
Either way, the contrast and the clubby atmosphere are a big problem. You can go down the road and buy a very narrow band filter (a couple of nm bandwidth) if you have at least 1kGBP. You can actually see prominences forming and changing, so they say.