giorgosgr

File taki as ta paroume me th seira. Prwton an prosarmoseis thn fwtografikh mhxanh sto thleskopio xwris prosofthalmio tote ousiastika to thleskopio einai enas thlefakos. Gia na breis to optiko pedio se moires des http://www.sweeting.org/mark/lenses/#formula Deyteron an theleis na deis poso einai to optiko pedio pou exeis kanontas optikh parathrhsh me enan prosofthalmio tote diareis to fainomeno optiko pedio tou prosofthalmiou me thn megetymnsh. Px enas prosofthalmios dinei megethynsh 100 fores kai exei fainomeno pedio 50 moires pragmatiko 50/100=0.5 moires, dhladh blepeis ston ourano enan kyklo diametrou mishs moiras(peripou oso o diskos ths selhnhs) triton o thlefakos einai 10x ayto shmainei pws sygrinomenos me ton normal fako twn 50mm dinei 10 fores megethynsh.(milame gia format 35mm gia 6x6 o normal fakos einai 80mm) Px 500mm thlefakos 500/50=10. Ena thleskopio schmidt cassegrain 8 intwsn gia paradeigma einai san thlefakos 2000mm f/10. dhl 2000/50=40x Tetarton gia na petyxeis megalyteres fwtografikes megethynseis gia na fwtografhseis as poume planhtes, ayksaneis thn estiakh apostash me to legomeno eyepiece projection dhladh parembaleis enan prosofthalmio anamesa sthn fwtografikh mhxanh kai to thleskopio. Ayta kai elpizw na se diafwtisa

Γεια σε όλους! Σήμερα 2:30 μμ κάθισα στην σκιά του σπιτιού μην δω κατά λάθος τον ήλιο και "σκούπισα" τον ουρανό με κυάλια 12x40. Βρήκα την Αφροδίτη εύκολα. Κατέβασα τα κυάλια κοίταξα προσεκτικά και σε μια στιγμή νάτη ορατή με γυμνό μάτι μέρα μεσημέρι! Εντυπωσιάστηκα! Το είχα ακούσει πως γίνεται αλλά δεν το πίστευα! Έχει κάνει κάποιος φίλος παρόμοια παρατήρηση; Θα θελα να μάθω. Καθαρούς ουρανούς σε όλους!

Geia sas! Egw agaphtoi filoi exw entelws antitheth apopsh peri goto kai tetoiwn bohthhmatwn gia arxarious. Yparxei tash kai gia fthna mikra goto gia arxarious gemata plastiko, me aparadekta mikro anoigma pou einai ligo parapanw apo skoupidia. Ti na kanei kaneis ena thleskopio 60 h 70mm me database 20.000 antikeimenwn?? Na blepei adeia pedia ekei pou einai ta deep sky antikeimena? Opoios thelei na asxolhthei me astronomia as ksekinhsei swsta.Mathainontas tous asterismous, xrhsimopoiwntas kyalia sthn arxh kai phgainontas stadiaka sto thleskopio pairnontas oti kalytero mporei na diathesei se poiothta kai megalytero se anoigma. An den exei thn diathesh h thn ypomonh gia kati tetoio tote... to hobby ayto mallon den einai gi ayton as psaksei kati allo. Filika Giorgos

File aggele, me liga logia: h fwtorypansh stous planhtes den prokeitai na se ephreasei, gia deep sky apo thn glyfada akoma kai me filtra ektos apo ta pio lampera deep sky antikeimena mhn elpizeis se polla pramata.... Filika, Giorgos

File spyro, tetoies erwthseis den einai dynaton na apanththoun se discussion groups. To thleskopio sou exei documentation sigoura me fwtografies sxhmata klp kai epishs yparxoun pampolla sites sxetika me plhrofories gia collimation se schmidt cassegrain thleskopia.Ena search sto google tha bgalei arketa apotelesmata. Ekei tha breis apanthseis sto erwthma sou. Enallaktika phgaine se enan syllogo na deis kai allous pepeiramenous erasitexnes katoxous SCT na se bohthhsoun.H diadikasia DEN einai katholou polypolkh aplws einai lepth logw tou oti mikra klasmata strofhs twn bidwn tou deytereyontos allazoun kata poly thn eythygrammish enos SCT.Epishs gia leptomerh eythygrammish aparaithto einai kalo seeing dioti apaiteitai ypshlh megenthysh. Filika Giorgos

To ti einai erasitexnhs astronomos kat eme einai oti einai h diethnhs ennoia tou orou sthn opoia symfwnei kai o eidikos typos pagkosmiws. Twra ta peri episthmhs kai iatrikhs xmm h erasitexnikh iatrikh einai paranomh ap oso gnwrizw (gia eynohtous logous) eytyxws pou anthrwpoi me tetoies idees opws merikoi sto astrovox den exoun kyrhksei akoma paranomh thn erasitexnikh astronomia ! eleos pia! Kala Xristougenna! YG Fysika kai h astronomia einai episthmh h erasitexnikh astronomia omws einai ena wraio(episthmoniko) hobby pou to askei kaneis opws tou goustarei!

File angele, sxetika me osa eipes sto post sou, 1) diafora barous kai ogkou metaksy 6"/f8 kai 8"/f6 mikrh den se ephreazei ws pros th metafora. 2) to megalytero f kalytero contrast??? OXI!!! prokeitai peri myhtou o opoios phgazei mallon apo to oti me ton idio prosofthalmio to megalytero f deinei kai megalyterh megenthysh ara skoteinotero pedio.Sthn idia megenthysh asxetws f diafora sto contrast mhden ews apeiroelaxisth, oxi logo f number aplws logw tou ligo megalyterou deytereyontos.Se planhtikh parathrhsh to megalytero deytereyon se ephreazei se deep sky den tha deis kammia diafora. 3) epeidh den exeis empeiria se thleskopikh parathrhsh synistw na apofygeis to goto,dwse ta xrhmata gia epipleon anoigma, den tha to metanoiwseis. To problhma ths fwtomolynshs einai sobaro akoma kai na ta briskei to goto pithanotata polla ourania swmata den tha nai orata.... Egw exw homemade dobsonian 8" f/4.5 xwris kan thleskopiko finder xrhsimopoiw mono ton eksairetiko quikfinder ths rigel (oxi ton ogkwdh telrad) kai ta briskw ola eykola kai grhgora.Eks allou mias kai exeis empeiria me kyalia ksereis hdh ton ourano kai me starhopping tha ton matheis akoma kalytera. Ayta. Filika, Giorgos

File Angele, mias kai kyriws se endiaferei to deep sky oso megalytero anoigma toso to kalytero.An exeis thn oikonomikh dynatothta pare to 8".Apefyge goto computers klp.Mathe ton ourano me starhopping. Giati nte kai kala Orion?Yparxoun ki alla 8" dobsonians. Filika Giorgos

File raqua, an diabases prosextika to posting mou den tou systhsa tou stefanou na parei to apochromatic aplws eipa pws kanei gia thn doyleia pou to thelei... antithetws h protroph mou einai gia to schmidt cassegrain. Ayta. Filika Giorgos

File Stefane, pare ena schmidt cassegrain ths meade h ths celestron kanei kai gia to a kai gia to b. Epishs kai ena 4"+ dioptriko apochromatic me thn katallhlh ishmerinh sthriksh kanei gia ta a kai b (ypshlotato kostos omws). To c den exei na kanei me to ti thleskopio tha pareis Meade http://www.telescopeshop.gr Celestron http://www.aktistar.com kai http://www.astronomy.gr Filika, Giorgos

Geia sou marouso, thleskopia me sthriksh dobsonian einai statherotata poly eyxrhsta.Tha sou synistousa apo kathe apopsh anepifylakta ena dobsonian. Fysika me dobsonian tha prepei na ksexaseis thn astrofotografia ektos apo thn entelws stoixeiwdh morfh ths. Ef oson se endiaferei to deep sky kalo einai na mhn pareis tipota katw apo 6 inches h akoma kalytera 8 inches.Twra to thema einai o proypologismos sou.....An den mporeseis na breis sthn timh pou theleis (ews 500 eyrw) mhn pareis kati pio mikro perimene na mazepseis kapoia xrhmata akoma. Filika, Giorgos

File Dimitri, mporeis gia na mhn paideyesai na dokimaseis ma syndeseis ta pc me ena programma epikoinwnias opws to pcanywhere, laplink klp h syndesh einai poly pio eykolh etsi.Epishs me to pcanywhere exeis thn dynatothta plhrous thlexeirismou enos pc apo apostash eite me apeytheias kalwdio eite me dial-up eite mesw diktyou... einai ekplhktiko programma.To xrhsimopoiw na thlexeirizomai tous ypologistes mou mesw tou diktyou pou exw sthsei spiti.Gia Win XP xreiazesai thn ekdosh 10 gia 98 exw thn 8 kai douleyei mia xara. Thymamai pws kai emena me eixe paidepsei arxika h apeytheias kalwdiakh syndesh sta windows, telika omws ta katafera Filika, Giorgos

File Kwsta, as ta doume ena ena... se endiaferei h parathrhsh deep sky kyriws, theleis anoixto endexomeno astrofwtografias, theleis forhto thleskopio, diatheteis 2000 eurw. To endxomeno astrofwtografias kai to oti diatheteis ews 2000 euro odhgoun se 8" schmidt cassegrain, sygentrwnei ola osa les. Antistoixo neytwneio ikano gia deep sky astrofwtografia xreiazetai stibarotath ishmerinh sthriksh kai sigoura tha einai pio xronoboro sto sthsimo, pio bary kai mallon kai pio akribo. An apofasiseis na egataleipseis thn astrofwtografia..tote mporeis na pareis dobsonian akoma isws kai 12" me 2000 eurw kai na deis poly perisotera deep sky antikeimena apo oti me ena 8" scmidt cassegrain. Elpizw na bohthhsa. Katharous ouranous!

Geia file Dhmhtrh! Xairomai eilikrina pou se bohthhsa. Sxetika me leitourgika den nomizw pws win98 tha mporoun na egatrastathoun kai na trexoun aksioprepws se enan 386..meine me ta 3.11 kai dos se toso palio ypologisth... Skefthka kai allh mia lysh gia syndesh tou paliou sou laptop me kainourgio desktop poly pio grhgorh apo thn apeytheias kalwdiakh syndesh alla kai pio dapanhrh..an sto laptop exeis PCMCIA ypodoxh tote mporeis na agoraseis PCMCIA karta diktyou gia to laptop kai aplh karta diktyou gia to desktop kai na ta syndeseis me synestrameno kalwdio se kanoniko diktyo. To pleonekthma tha einai h poly ypshloterh taxhthta sthn syndesh (ews 100mbps)apo oti me parallhlo kalwdio. Sxetika me drivers ektypwtwn apo oti thymamai oxi den xreiazetai na tous ksanaegatasthseis(lew apo oti thymamai giati edw kai poly kairo exw pia syndedemena ta dyo pc mou me kartes diktyou ) Filika Giorgos

File dhmhtrh, fysika kai ginetai to exw kanei pampolles fores sto parelthon.. Akoma kai PCs me dos kai win 98 mporeis na syndeseis. To aparaithto software to periexoun hdh ta windows.Kai to seiriako kai to parallhlo kalwdio einai pamfthna.To parallhlo einai pio grhgoro. H syndesh mesw kartwn diktyou einai allo pragma...an eixes sygxrono laptop pou periexei karta diktyou me ligotero apo 15 euro agorazes allh mia karta diktyou gia to desktop PC kai me ena synestrameno kalwdio diktywnes ta dyo pc eykola kai grhgora.Eidika an to desktop exei win XP o wizard bohthaei poly sto sthsimo tetiown syndesewn. Gia apeytheias kalwdiakh syndesh des edw http://www.kime.net/directcc/directcc95.htm Ena search gia direct cable connection tha bgalei polla apotelesmata. An dyskoleyteis apeythynsou se enan filo pou gnwrizei kala apo ypologistes. Perimenw nea sou an to katorthwses. Elpizw na bohthhsa. Filika, Giorgos

Geia xara! kata rxhn o filos giorgos oxi mono gnwrizei ti einai AAVSO alla tygxanei melos ths kai o idios.... (ayto isws ton kanei kai erasitexnh astronomo kat ese..oxi kat eme). To thema den einai ti prosferei h oxi h AAVSO alla to ti einai erasitxenhs astronomos... Kai nai safws kai DEN xreiazetai na kanei kaneis kammia systhmatikh katagrafh h parathrhsh gia na onomazetai erasitexnhs astronomos. Diaxwrismoi "stargazers" kai "erasitexnes" einai efeyrhma pou to prwtoeida sto forum tou astrovox apo kapoious filous. Isws kai deigma elitismou apo merikous..to parablepw..den me apasxolei.. To ksanalew: Erasitexnes eimaste osoi agapame ton ourano kai ton parathroume kai den mas endiaferei an tha kanoume "sobarh" douleia h oxi.Den exoume agxos na moiasoume se epaggelmaties h na prosferoume nte kai kala sthn episthmh..mporei merikoi na prosferoun merikoi akoma na asxolhthoun kai epaggelmatika merikoi na meinoun aiwniws romantikoi "stargazers" kathe erasitexnhs (astronomos giati peri astronomias milame oxi arxaiologias h den kserw gw ti)opws tou aresei.... Oso gia to signature peri refractors.... xmm einai ena asteio tou grafontos pou antitithetai sto trend ths epoxhs gia mikra panakriba apos kai aparadekta fthna konta achromatics me mpoliko deytereyon fasma. Ayta ! Katharous ouranous se olous, "sobarous" kai mh!

Pare ena kalwdio syndeshs ypologisth me ypologisth parallhlo h seiriako kai kane apeytheias kalwdiakh syndesh na metaferis oti theleis

To thema safws kai tithetai istorika... erasitexnhs astronomos einai aytos pou asxoleitai me thn parathrhsh tou ouranou twn gnwrizei apolambanei thn omorfia tou... Den xriazetai na exei ccd cameres na zwgrafizei kathe mara ton dia oute na kanei dhmosioypallhlikes katagrafes tou megehtous metablhtwn... Twra diaxwrismoi se stargazers kai sobarous pou exoun kata kairous ksanaakoustei edw einai aney nohmatos kai efeyrhma atomwn pou exoun metasxei sto forum tou astrovox... Oloi erasitexnes eimaste kai kathenas mas kanei to hobby tou opws tou kapnisei..... An thewrhsoume erasitexnh ayton me thn "sobarh" parathrhsh..tote bgazoume ektos oloklhra kommatia ths erasitexnikhs astronomias... den perei na parathroume deep sky px para mono gia na doume an yparxoun supernoves se kanenan galaxia ..sfairwta smhnh anoikta smhnh planhtika nefelwnmata?? mpaa gia ametrhta xronia idia tha einai.... dipla astra?? mpa den exw mikrometro na ta metrhsw kai na katagrapsw E loipon egw eimai "asobaros" kai thewrw eayton pio proxwrhmeno erasitexnh apo pollous "sobarous".... Eimai erasths ths astronomias kai ayth mou einai pisth Katharoi Ouranoi gia olous "sobarous" kai mh

Geia file Thodore! Sxetika me times..xtes eida sto sky and Telescope to review toy 12.5" dobsonian ths discovery(www.discovery-telescopes.com) rikse mia matia sto periodiko h timh tou einai kalh isws pio symferon apo to na agoraseis kommatia.....kai to review poly thetiko. Sxetika me astigmatismo..synhthws ton synantas se lepta katoptra an einai plhrous paxous to katoptro spania synantas tetoio problhma... Apo thn allh to pio paxy katoptro paroti pio eykolo sthn sthriksh(den exei kampseis) prosarmozetai pio arga sthn thermokrasia periballontos..ena anoixto cell kai ena anemisthraki bohthane Twra sxetrika me tous grhgorous estiakous logous.....ena meionekthma einai to aykshmeno sfalma komhs(coma) kai to oti o f/4.5 kwnos fwtos einai enas sfageas prosopfthalmiwn Apotelesma katafeygeis se akriba coma correctors kai panakriba prosofthalmia Nagler panoptic klp. Egw den katafeygw se akriba coma correctors....zw me ligaki coma den peirazei. Oso gia prosofthalmia plossls kai orhtoscopics ta katafernoun kala me f/4.5....einai kales oikonomikes lyseis.... Kalo einai ena setaki me 3 as poume parfocal plossls h xamhlh isxys gia aneyresh oi pio ypshles gia pio leptomerh parathrhsh xwris na xreiazetai na estiazeis pali h estw xwris na exeis megalh diafora sthn estiash.... Bazeis kai enan telrad h quikfinder(protimoteros o quikfinder) kai exeis ena deep sky workhorse Toso wraios einai o quikfinder pou egw sxedon pote den noiwthw thn anagh gia thleskopiko ereynhth.Briskeis kathe ti me thn prwth sthn xamhlh isxy..anebazeis isxy toso apla....... Pairneis kai enan kalo orthoscopic gia ypshles megethynseis se planhtes (kata thn gnwmh mou se oksythta akoma akseperastoi oi orthoscopics) kai eisai komple! Sxetika me syllogous des to site http://www.astronomia.org.gr/ kai epikoinwnhse me ta paidia... tha breis oti bohtheia theleis. Egw eimai melos kai eimai poly eyxaristhmenos paroti spania metexw stis synanthseis kathoti den eimai katoikos athhnas. Ta leme! Katharous ouranous!

Geia file Thodore! Kataskeywn synexeia.. egw den tha eftiaxna truss thleskopio...protimotero na exeis ena me swlhna en anagh an theleis 12" kane to pio konto(f/4.5-f/5) wste na metaferetai kai pio eykola.To truss thelei synarmologhsh aposynarmologhsh kai kathe fora tha thelei kai eythygrammish kai epishs an den einai kai stibarh h kataskeyh mporei na xanei thn eythygramish tou opws to gerneis pros ton orizonta.... Go to??? mpliaxxxxxx me to xeri kinw to thleskopio panw apo 100 moires/sec kanena goto den ftanei aythn thn taxythta Stis meres mas yparxoun kai merikoi me thn nootropia: egw den tha mathw ton ourano to goto tha mou ta briskei..kati tetoious DEN tous thelw sto hobby apoteloun mastiga gia thn erasitexnikh astronomia. Xwria oti me to goto xaneis thn plaka na briskeis ta ourania swmata.... kai plhrwneis kai arketa lefta ta opoia kalytera na ta dwseis gia megalytero/kalytero thleskopio. Oso gia to katoptro ths orion.. ki egw fthno katoptro exw balei, einai ligo ypodiorthwmeno alla never mind merikh sfairikh ektroph einai anekth. Eidika an se endiaferei deep sky parathrhsh.Par oti kai gia planhtes kala eidwla pairnw, den eida kai kammia diafora apo Schmidt-Cassegrains idiou anoigmatos,isws malista na einai kai pio kalo to fthno mou newtonian akoma kai se planhtes(se deep sky einai! den to syzhthw ) Ekeino pou den einai anekto kata thn gnwmh mou einai astigmatismos kai turned down edge...eidika to deytero einai eksairetika enoxlhtiko mh estiasmeno fws grizarei to pedio... monh lysh na mauriseis mia zwnh sto eksw meros tou katoptrou xanontas anoigma. An paraggeileis katoptro rwta an mporeis na to steileis pisw me plhres refund se periptwsh pou den eisai eyxaristhmenos. Gia katw apo 10" kai apo aplo tzami na einai o kathrefths den exei idiaiterh shmasia(isws kai gia megalyterous na mhn exei) an einai anoixto to cell kai pairnei thn thermokrasia tou periballontos grhgora tote no problem.Ekeino pou enoxlei einai h metaballomenh thermokrasia oxi h ypshlh h xamhlh..otan to katoptro pari thn thermokrasia tou periballontos tote eite apo aplo tzami eite apo pyrex eite apo metallo to idio kanei... Egw gia 350 $ tha ton skeftomouna ton kathrefth alla nomizw h orion den apostellei ektos USA Apo thn allh mporeis na psakseis gia optika kai sthn eurwph toso h orion optics uk oso kai h beacon hill exoun kalo stock(den exw url proxeira alla me ena search sto google tha ta breis).Epishs ta metaforika tha nai ligotera kai tha glytwseis pithanous dasmous. Edw gia oti allo thelhseis. Filika, Giorgos

Geia sas! Thread endiaferon! Oso gia thn arxh?? xmm mallon ksexase o filos na anaferei pws ektos apo to oti h gh einai sto kentro toy sympantos einai epishs kai epipedh kai sthrizetai panw se 3 elefantes!!!! Ela Xriste eimaste me ta kala mas??

Geia se olous! Sxetika me thn kataskeyh thleskopiou pou rwtaei o filos Thodoros... Gine ligo pio sygekrimenos..poso megalo thleskopio?? "poso" skopeyeis na kataskeyaseis?? agorazontas etoima komatia apo to emporio?? tribontas monos katoptra?? As parathesw merikes skepseis mou ..Egw exw kataskeyasei ena 8" f/4.5 me kommatia apo to emporio. Kata thn gnwmh mou to na katakseyaseis katoptro mikro (6"-8") den symferei oute oikonomikws (kostos kit + apostolh sto ekswteriko gia epalouminwsh eykola tha sou kostisei parapanw apo ena etoimo katoptro). Se pio megales diastaseis (10" +)isws symferei alla tote tha xreiasteis thn peira apo th kataskeyh pio mikrwn katoptrwn prwta... H agora etoimwn eksarthmatwn apo to emporio kai pali isws na mhn symferei oikonomika alla aksizei ws empeiria kai gia tis gnwseis pou mazeyeis kathws epishs gia to oti kataskeyazeis ena thleskopio symfwna me ta protypa pou exeis sto myalo sou kai pou pithanotata den mporeis na to breis etoimo sto emporio. An epithymeis na kataskeyaseis katoptro,ta parakatw biblia einai klassika sthn kataskeyh thleskopiwn ta perissotera epikentrwnoun sthn kataskeyh tou prwteyontos a)Making your own telescope A. J Thompson (palio alla kalo!) b)Standard handbook of telescope making(prosoxh exei lathh sthn analysh tou foucault test kata ta alla kales odhgies gia kataskeyh katoptrwn). c)How to make a telescope J. Texerau(h apolyth aythentia sta optika, ta peri cassegrain klp einai axrhsta gia ton meso anthrwpo opws kai ta optical windows parablepse ta) d)ATM volume 1 palio alla parousiazei kapoio endiaferon.Des arthro The amateur's telescope toy Ellison. e)Homemade reflecting telescopes Sam brown endiaferon me wraia skitsa. Egw ta exw ola, an htan na dialeksw mono ena tha dialega to prwto Sxetika me to bilbio tou berry... ws egyglopaidiko anagnwsma einai kalo kamia kataskeyh tou den einai eykolh antithetws merikes einai kai periplokes. Kalytera an ftiakseis thleskopio na ksexaseis tis silikones kai ta ksylina cells tou Berry kai na pareis ena etoimo alouminenio me liga dollaria opws kai focuser (ena helical einai kalos symbibasmos timhs /apodoshs). H university optics (www.universityoptics.com)exei fthna kai kala cells kai spiders. Des kai www.murni.com gia katoptra klp eksarthmata. Thewrw pws milas gia kataskeuh dobsonian giati gia na kataskeuaseis ishmerinh bash prepei eite na eisai mhxanourgos eite na perioristeis se aplh ishmerinh bash me ydroswlhnes pou eixan oi erasitexnes mia genia prin(poly astathesterh kai pio ogwdhs apo mia dobsonian). Ayta.. elpizw na bohthsa kai edw gia oti allo theleis Filika, Giorgos

Geia file Vagelh! Mhn petas ta lefta sou ws arxarios.Pare kati aksioprepes.Ena dobsonian 8" px xwris goto klp na matheis kai ton ourano.To thleskopio pou les einai poly mikro gemato plastiko me panalafro tripoda.Tha to xarakthriza epipedou department store kai epipleon plhrwneis kai ta hlektronika tou.An den exeis thn oikonomikh eyxeria gia dobsonian 8" perimene ligo akoma na mazepseis ta xrhmata.Oso gia to autostar kai 500.000 antikeimena database na exeis kai loipon ? posa tha fainontai apo ayto to thleskopio?? Filika Giorgos

Geia file Costa! Sxetika me thn eythygrammish twn katoptrwn apanthsh ston periorismeno xwro enos newsgroup den mporei na dwthei.Kane ena search sto google gia newtonian collimation na breis pampolla sites. Sto deytero thema.. sxetika me thn parathrhsh tou hliou.. Ton hlio ton parathroume PANTA me filtra pou mpainoun mprosta apo to thleskopio kai POTE me filtra pou bidwnoun panw ston prosofthalmio opws ayta pou dinontan mazi me kapoia mikra dipotrika thleskopia sto parelthon kai den kserw an dinontai akoma.An exeis tetoio filtro PETAKSE to! Me filtro mprosta apo to thleskopio thema yperthermanshs den yfistatai. Enallaktikh methodos einai h probolh tou hliakou eidwlou mesw prosofhtalmiou panw se mia leykh epifaneia (xarti klp).Ayth h methodos gia katoptrika thleskopia eidika kapws megalytera den synistatai dioti yparxei kindynos yperthermanshs tou deytereyontos katoptrou.Mporeis omws na baleis ena aperture stop na mikryneis to anoigma an thes(ena aplo xartoni san kalyma me mia trypa 3" as poume gia ena thleskopio 8") Epishs mporei na pathei zhmia o prosofthalmios.To balsamo tou kanada pou exoun kollhthei ta optika stoixeia mporei na liwsei...protimoteroi einai oi palias sxediashs prosofthalmioi (ramsden kai huygenian) pou den exoun kollhmena optika stoixeia gia probolh tou hiliou. Elpizw na bohthsa katharous ouranous

Geia sas To sygekrinmeno thleskopio fysika kai to gnwrizw kai exw dei apo ayto. To oti thn sygekrimenh bash thn xrhsimopoihse kapote h Celestron gia to C-5 den shmainei tipota.Exoume dei kai apo thn Celestron kai apo thn Meade plhthos fthnwn basewn kai aparadektwn thleskopiwn.To marketing twn etaireiwn den einai panta pros symferon twn erasitexnwn.... Oso gia aplh astrofotografia..exw bgalei afocals me to dobsonian mou kai einai arketa kales...thleskopia se baseis opws h EQ1 kai EQ2 mporei kai na bgazoun kounhmenes astrofotografies mono kai mono apo tous kradasmous tou kathrefth mias SLR.....(to exw dei kai ayto)...Gi to pws ksekinhsame emeis ..kai to pws talaipwrhthkame....einai pikrh istoria.. gi ayto kai ofeiloume tous pio kainourgious sto hobby na tous kathodhgoume swsta....thleskopia se baseis opws h EQ1 kai EQ2 kanoun kako sthn erasitexnikh astronomia.... Oso gia thema xrhmatwn...to skywatcher 130 EQ se timh 342 euro den apotelei kalh agora! Se 545 euro dinetai to 8" dobsonian ths Celestron... gia 200 euro parapanw pairnei kaneis ena thleskopio pou pithanon kai se olh tou thn zwh na mhn noiwsei thn anagh gia megalytero... Akoma kai to 8" dobsonian ths skywatcher sta 658 euro kalyterh agora einai apo to 130 EQ!(Exei kai mhxanismo tension control pou den exei to celestron). Mono pithano pleonekthma toy 130 EQ einai to oti mporeis na bgaleis piggybacks (me prosthhkh moter dhl epipleon kostos) an den tremei h bash me to epipleon baros mias SLR ..... Katharous Ouranous! YG Den dinw synexeia sto thread...paratrabhkse