Barlow: umkhiqizo incazelo

Barlow ingenye accessory ye ethandwa kakhulu izingalo zezinkanyezi, kokubili professional ne amateur. Kubalulekile kule mkhakha womsebenzi. Le divayisi ilula isesimweni lens ngilugweda (negative), okuyinto kakhulu kwandisa kokukhulisa ngempumelelo kwesibonakude. Lo msuka zasungulwa emazweni sezibalo XIX leminyaka uPetru Barlow. Yingakho igama lalowo kule divayisi.

izicelo umkhiqizo

Ngenxa yokusebenza kwalo ngezindlela eziningi, Barlow lens kabanzi ngempela esetshenziswa izazi zezinkanyezi ezingama iziqu ezahlukene. Nale divayisi ungakwazi baphathe esiphezulu ukwanda kunokwenzeka entweni ukuthi siyenzeka ngokusebenzisa isibonakude. Le mpahla ebalulekile. Ngokwesibonelo, Barlow 2x lens lapho uyibeka phakathi eyepiece kwesibonakude kanye lens, enikeza ejwayelekile 100x ukukhulisa kwandisa isibalo ukuze 200x. Kodwa ukwanda njengoba ewusizo incike ukuzinza kanye asemkhathini izimo, ukusetshenziswa wathi umkhiqizo akulona iqiniso ngaso sonke isikhathi. Ngokwesibonelo, uma ngesikhathi kokukhulisa ka airflows 100x isithombe ukufiphala, le Barlow lens kabili ezingeni isilinganiselo ukuba 200x, ngeke senze isimo sishube. Indlela ephumelela kakhulu ukusetshenziswa kule divayisi lihambisana isibonakude iDemo kugxiliswe kwenye indawo. Kudivayisi Barlow lens uyonika kahle eside ngenxa yokuthi ukuthi izibonakude wathi azibalulekile eguquguqukayo, ngoba asetshenziswa ejwayelekile iDemo-focus eyepieces. Barlow futhi iyithuluzi elibalulekile kakhulu ekuthwebuleni amaplanethi ku ifilimu noma ikhamera yedijithali.
Inikeza ithuba "silingo" esincane imininingwane, noma sondeza isithombe. Ngenxa ukushuba encane ingilazi ukukhanya endleleni izinga lens uyonika yi okuhambisanayo kuka projection ngokusebenzisa eyepiece a photodetector.

isithunzi

Inzuzo enkulu kule divayisi ukuthi kwandisa umthamo kokukhulisa etholakalayo. Ngokwesibonelo, uma ikhona izazi zezinkanyezi eyepieces kukhona 10 mm, 18 mm, 26 mm, phambi Barlow 2x njengoba iwusabalalise instrumentny unikeze lezi amadivayisi 5 mm, 9 mm no-13 mm. Kuyinto ukonga kulokhu. Ngamanye amazwi, a lens Barlow Ungashintshanisa ezintathu we eyepiece.

ukwehluka

I lens ezivamile Barlow kwaba kabili (2x). Nokho, okwandisa Okuphindaphinda kusukela idatha ekhiqizwa imikhiqizo usuku wehlukile kakhulu. 3x Barlow lens kuvamile impela, futhi 4x, futhi 5x, futhi ingafakwa 1.5X futhi 2.5x ezitholakele. Kukhona onobuhle kokukhulisa variable kusuka 2 kuya ku-3. Izinkinga ukusetshenziswa kwalezi lens ukususwa bengayi sezingeni eliphezulu kwesibonakude focus.

Council

Esikhathini Ukukhethwa ezidingekayo Barlow lens kwesibonakude etholakalayo, ngokukhethekile kufanele kukhokhelwe ububanzi we emikhonweni kokwehla. lingakanani kungenzeka 0,965, 1.25 noma 2 amayintshi. Kufanele kube nsé ububanzi we focuser and lihlala eyepieces. Ukuze uthole kokukhulisa ekabili usebenzisa 2x Barlow lens, kubalulekile ukuba ahlele idayagonali phakathi esibukweni kanye eyepiece. Le mikhiqizo ngempela high kufanele bakhanyiselwa futhi kuhle kufanele kube multi-egqinsiwe.