We used the school Russian
telescope refractor 60/83.
In our
observation we used sun filter put on object – glass and projection method
through screen, seen on the photos. The filter was used for visual watching
from students. The sun disc focused on the screen we used with the measurement
and group watching.
For the time of the contacts we
used a watch NEC (USA). For the visual watching we used object glass with focal
length 25mm and for projection focus length 10mm through prism 900.
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