----------------------------------- Mircea Pteancu 08 Iun 2009 16:17 ----------------------------------- Cu ocazia implinirii a 400 de ani de la inventarea telescopului,au aparut mai multe materiale de popularizare pe aceasta tema.Despre filmul "400 Years of the Telescope" vorbeste pe ''oldscope'' Roger Ceragioli,pe care-l citez mai jos.Dupa cum s-a scris si la noi pe forum,este dovedit faptul ca Chester Moore Hall a facut experimente referitor la acromatizarea obiectivelor.Ba chiar ,dupa cum afirma o scrisoare aflata in posesia lui Royal Society,a si comandat/construit obiective,fara ca toate acestea sa fi avut urmari semnificative. Subiectul care-l nemultumeste pe Roger este legat de discriminarea prin omisiune,de catre realizatorii filmului, a lui John Dollond si a intregii sale familii de opticieni remarcabili.John Dollond a re-inventat independent si a impus de fapt obiectivul acromat,actiune continuata de familia sa .Este corect sa recunoastem meritele de pionierat ale lui Hall dar prin ignorarea voita a lui J. Dollond,filmul este asadar incorect si deci incomplet.De stiut!Mircea ......................................................................................................... I watched the video of "400 Years of the Telescope" tonight. In general it was o.k. and rather interesting, but I was quite surprised to see no mention of John Dollond, who had been completely displaced by Chester More Hall. Hall was being haled as the inventor of the achromat in about 1729. It was as though achromats became common after Hall, who was said to have conducted many prism experiments with different glasses. My host knew the main writer, and said that he had been forced by PBS to dumb down the script twice. No doubt the video may fire the imagination of young people, which would be a fine thing. But too bad they cut out all credit for one of the leading family of telescope makers of all time, and replaced their achievements with speculations and hearsay about the reclusive More Hall. Cheers, Roger