Reply To: Historic camera found in NLO store room

[Mike Harlow]

On a related issue, does anyone know what happened to the objective prisms at NLO?
There is a nice BAAJ article from 1982 [1] that mentions three prisms, two for the 300mm refractor and one for the 225mm refractor. They appear to have been used up till 1961 but then no mention of them.
If they were full aperture prisms they would be serious pieces of glass having angles of 15, 20 and 45 degrees. Not items that could be ‘lost’ easily, so they could still be at NLO or deliberately moved somewhere else.
Any historical background on these prisms would be interesting for my own objective prism project.
Thanks.
Mike.
Ref: BAAJ 1982, 93, 1, p25-28. “Sic Itur Ad Astra: A History of the Norman Lockyer Observatory“