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That is cool indeed. How do you deal with the motion? Does it not move out of view pretty quickly at this magnification?
sohi-
Turns out it does - I tried to trace one after posting the above, and only when you try and get your pencil on the paper do you realise how quick it's all moving. I think we should try focusing onto graph paper, taking photos and then transcribing.
Turns out Grandpa had been taking records earlier in the week and comparing them to what NASA had to offer - here's his workings:
Scrabble
These look great. I'm at my in-laws at the moment and the clear skies have got Grandpa teaching the kids about all this using his slightly more lo-fi setup. I give you - The Sunspot ViewTracker 2000.
It utilises an old set of binoculars of unknown magnification, some scrap wood, a cardboard tube and 87 years of scientific knowledge and experiments. The sun is focused down one side of the binos, through a pinhole in some metal sheet, down through the cardboard tube and onto a piece of paper at the end.
Approximate aim is achieved with the sight markings at the binocular end, and the binoculars focused until a crisp image is projected on the paper.
Zoom/enhance:
Think we need to set up it on consecutive days, trace the spots and get a flip book going!