Hello!! It's Joseph

Dall Kirkham binoscope , built in 1980s 6 in f15 Nov 1982 S&T Telescopenerd   Another article  on binoscope making Norman lived in Hong Kong since 2004. After retirement, he moved to Saipan and Guam to continue his hobby the book

  Han ( aka Immortal30)  250mm F/L 2940mm Yoon http://www.sac-club.co.kr/xe/sp_photo_renew/337285 http://www.gogostar.kr/59/?q=YToyOntzOjEyOiJrZXl3b3JkX3R5cGUiO3M6MzoiYWxsIjtzOjQ6InBhZ2UiO2k6MTE7fQ%3D%3D&bmode=view&idx=4272185&t=board fdk250: http://www.astronet.co.kr/xe/index.php?mid=gallery_dso&menu_srl=61&listStyle=webzine&order_type=desc&category=104001&document_srl=238432 the corrector reducer is 4 elements in 3 groups D=150mm, f=750mm, Flat-field Dall-Kirkham, 유준규님 자작품) https://m.blog.naver.com/PostView.naver?blogId=williology&logNo=221611556984&categoryNo=1&proxyReferer=https:%2F%2Fwww.google.com%2F https://m.blog.naver.com/PostView.naver?blogId=williology&logNo=222251345360&navType=by https://m.blog.naver.com/williology/221878187891 https://m.blog.naver.com/hparksy/169779455 https://m.blog.naver.com/immortal30/220633180895 http://astrophoto.co.kr/astrophoto/239270 http://www.tofrom.kr:90/ex/index.php?mid=rn...

home made in ~1978: Left: Celestron C11 30cm x 56 cm: (diameter x height), 13.2 kg Right: home made 20cm Dall Kirkham 24 cm x 66 cm, 11 kg nifty1 nifty2