Modern replica of Herschel's 7 feet reflector with bronze mirror made in Japan with detailed discription of mirror alloy casting and polishing techniques:
https://hikariao-la-...&_x_tr_pto=wapp
https://hikariao-la-...&_x_tr_sch=http
Reproduction of Herschel’s Metal Mirror Telescope
http://www.ne.jp/asa...ke/ttnd/mito2/
Edited by mvdmitri, 14 January 2022 - 07:05 PM.