petrosccd

Dimitri, An diabaseis prosektika tin apantisi mou tha deis oti den isxirizomai oti allazei o olikos arithmos ton fotonion pou lambanoume (an kai auto episis simbainei se mikres xronikes klimakes kai idios se mikra tileskopia), alla einai lathos na xrisimopoieis to oro "entasi" otan ousiastika anaferesai stin lambrotita tou astera. Giati i entasi orizetai san isxis fotos (arithmos fotonion sti monada tou xronou an thes) sti monada tis epifaneias (einai Watt/m^2 diladi). Synepos i entasi epireazetai apo to seeing opos poly sosta anefere sto paradeigma tou kai o Giannis... Petros

Genika osa eipothikan apo tous prolalisantes einai sosta, alla prepei na exoume sto myalo mas oti to seeing einai thema kai topou kai xronou. Polloi miloun gia mia euria geografiki perioxi kai lene px oti to seeing sto tade bouno einai kalo... Auto omos einai lathos giati to seeing sti mia plagia mporei na einai kalo kai stin diplani xalia (tin idia nykta) -eno den apokleietai na exoume diaofores kai se apostaseis merikon dekadon metron (px otan eimaste konta se asfaltino dromo klp). Episis xronika mporoun na yparxoun megales diaforopoiiseis analoga me ton kairo (an yparxoun megala systimata pou epireazoun tin perioxi, ti iliofaneia ypirkse kata tin mera klp). Synepos to an kapoio simeio exei kalo seeing einai arketa polyploko thema kai xreiazontai polla statistika stoixeia. Pantos mporoume na poume oti genika se ena bouno perimenoume kalitero seeing mia kai i maza tou aera pou perna to fos mexri to tileskopio einai mikroteri -omos opos proeipa auto eksartatai se megalo bathmo apo tin akribi topothesia kai ton kairo. Etsi to kalitero simeio se ena bouno einai konta se koryfi kai oxi se plagies, giati polles fores sximatizontai katabatikes roes meta tin dysi tou iliou. Episis polles fores otan o anemos erxete apo tin piso pleura tou bounou, tote pali tha exoume kako seeing giati dimiougeitai strobilismos stin roi pou katebainei tin diki mas plagia (ara prepei na eimaste pos ta ekei pou fysa o anemos). Episis paraliakes perioxes exoun syxna fainomena auras kai isxirous anemous opote pali den einai idanikes perioxes. Stis polis genika to seeing eksartatai para poly apo to pou akribos einai kapoios. An px einai se kapoio anoikto meros xoris polla ktiria tote to seeing mporei na einai kalo, alla sigoura o anemos stis poleis dimiourgei problimata. Dystixos i ektetameni xrisi klimatistikon to kalokairi (akoma kai otan den kanei poly zesti) pou fysoun thermo aera einai to xeirotero. Einai eukolo kaneis na dei ta therma anodika reumata pou sximatizontai gyro apo tis polykatoikies se elafra eksoestiaka eidola! Pantos analoga pou eisaste se ma poli mporei na exete kai poly kalo seeing - prota paratiriste se kales nyktes xoris anemo (idios se periodous pou i thermokrasia arxizei na auksanei meta apo notiadaki) kai meta bgazete symperasmata... Episis tha ithela na paratiriso oti to seeing epireazei tin entasi tou eidolou! O logos einai arketa profanis: to kako seeing exei san apotelesma na diaspeiretai to fos se megaliteri gonia (o diskos tou astera auksanei) kai synepos i entasi meionetai -bebaia den meionetai to oliko fos pou lambanoume apo ton astera. Synithos omos auto den epireazei tin optiki paratirisi deep sky antikeimenon apo skoteinous oranous giati i megethynsi pou xrisimopoiitai mporei na einai mikri. Petros

Αγαπητοί φίλοι, Η πρόταση του Αντώνη (να μην υπήρχαν οι τοπικοί σύλλογοι που υπάρχουν αλλά να υπήρχε ένας εθνικός σύλλογος) είναι ενδιαφέρουσα, αλλά νομίζω ότι δεν έχει σχέση με την Ελληνική πραγματικότητα, ενώ δεν έχει και ουσιαστικό νόημα γιατί στην Ελλάδα υπήρξε άλλη ιστορική εξέλιξη. Επιπλέον αυτό που δουλεύει σε κάποια άλλη χώρα δεν σημαίνει ότι κάνει και για μας. Εδώ να θυμίσω ότι πχ στις ΗΠΑ τα πράγματα δεν είναι όπως στον Καναδά, αλλά κάθε χωρίο έχει και δικό του σύλλογο. Το τι είναι καλύτερο -δηλ. ένας εθνικός σύλλογος με πολλά τμήματα ή πολλοί σύλλογοι τοπικοί νομίζω ότι είναι πιο πολύ θέμα γούστου και ιστορίας (γιατί σίγουρα άλλη ανάπτυξη και παράδοση έχει ο Καναδάς και άλλη εμείς). Τώρα το επιχείρημα ότι καλύτερα ένας σύλλογος με 500 μέλη παρά 50 με 25 μέλη, νομίζω θέλει επαρκή τεκμηρίωση... Τι ακριβώς εννοείς Αντώνη? Γιατί είναι καλύτερα? Πέτρος

Galaxia, gia sou ki apo mena, Symfono 100% me auta pou leei o Giannis. Ostoso i diki mou apopsi einai oti 900 euro gia proto tileskopio (kai molis 9cm) einai polla. Nomizo i kaliteri epilogi tha itan ena tileskopio xoris polla frou-frou, xeirokinito gia na matheis kai ton ourano... Petros

Agapitoi filoi, Exthes to bradi paratirithike apo arketes perioxes tis Ellados ena poly foteino fireball. Opoios to eide parakalo as epikoinonisei mazi mou sto: peter_ccd@hotmail.com prospatho na sygkentroso plirofories sxetika. Euxaristo, Petros

Bre Kosta ti planites kai fotografisi tous tha kaneis me 90mm?? Gia na mporeis na deis kati ousiastiko thes arketa megalitero tileskopio. Mia kali lysi an den mporeis na diatheseis ta xrimata pou apaitountai einai na ksekiniseis me optiki paratirisi me ena Neftonio >15cm... Petros

Des exo S&T alla logika prepei na itan o Ganimidis pou eixe transit mexri tis 8pm. Petros

Mia diorthosi, to thampogialo legetai etsi oxi giati otan den estiazeis einai thampa, alla giati einai akribos auto pou leei i leksi! Einai ena gialaki me tin mia epifaneia oxi leia alla traxeia. An kaneis koitaksei mesa apo to tzamaki auto ta antikeimena piso tou fainontai thampa akribos logo tis traxititas tis epifaneias. Ostoso i eikona tou fakou otan estiastei epano se auti tin traxeia epifaneia mporei na fanei kai apo piso kai gia auto xrisimopoieitai stis fotografikes mixanes. Me alla logia to thampogialo einai akribos opos ena rizoxarto, an deis mesa apo auto ola fainontai thampa, alla an pareis ena fako kai estiaseis se auto i eikona fainetai kai mpros alla kai piso apo auto. Petros

H akribis imerominia tis isimerias diaferei apo xrono se xrono giati i periodos peristrofis tis gis gyro apo ton ilio den einai akeraio pollaplasio tis periodou peristorfis tis gis gyro apo ton aksona tis. Yparxei xondrika mia diafora tis takseos ton 6 oron (gia auto exoume kai ta disekta eti), me apotelesma i gi na brisketai kathe 21/3 ligo pio piso stin troxia tis -mexri na diorthothei me tin epipleon imera tou disektou etous. Me alla logia to politiko imerologio den symbadizei akribos me tin thesi tis gis stin troxia tis. Petros

Nick, I can't give you a specific address at the momment but there are several companies that make sun-glasses, by means of aluminizing (you know the reflective sun-glass type that looks like a mirror). Of course they usually make very thin coatings but I think they could easily accomodate a thicker coating for you. The other option would be shipping abroad. Petros

H C1 exei mixaniko shutter kai Bulb. Einai apli mixani kai kali mixani xoris polla frou-frou... Kanei mia xara gia astrofotografisi. Yparxei kai se montelo me xronokathisterisi (C1B or kati tetoio). Petros

Ta dio simantika themata pou prepei na prosekseis einai i mixani na exei Bulb (opos anefere kai o timepasser) kai to shutter na einai mixaniko! An einai ilektroniko, tote gia na meinei anoikto xreiazetai na katalonei reuma apo tin mpataria, opote me tin proti ekthesi sto kryo tis nyktas exei teleiosei i mpataria kai i mixani einai axristi! Episis kalo einai na exei xronokathysterisi (typika 10sec), oste na teleionoun oi talantoseis pou dimiourgountai apo to patima tou koumpiou prin parei tin eikona... Auta einai ta basika kai gia astrofotografisi den xreiazesai tipote parapano! Psakse se magazia pou poulane metaxeirismenes kai kati tha breis... Petros

Kanal, An mporeis na stiseis ena mikro paratiritirio stin taratsa (kati aplo me roll-off roof) tote isos aksizei... Allios an i apaitisi sou einai na metafereis to tileskopio synexos tote to C-14 den einai gia sena! Petros

Kanal, Kai san ogko to C-14 einai poly megalo kai an to autokinito sou den exei arketo apothykeutiko xoro den tha mporeis na to metafereis! Apo oti ksero auto einai kai to problima tou Antoni me to autokinito pou exei... Bebaios den thelo na se apotharino, to C-14 einai ena poly kalo tilekopio gia oti theliseis na kaneis, alla thelo na se proidopoiiso sxetika me ton ogko kai to baros tou oste na min kaneis gkafa kai bretheis me ena C-14 na pianei skoni sti apothyki sou! Ego pisteuo oti ena tetoio tileskopio einai gia monimi egkatastasi. An diathetis sxetiko xoro, akoma kai se poli me fotorypansi, einai kalitera na to egkatastiseis ekei para na to xrisimopoieis mono mia-dio fores to xrono pou tha mporeis kai tha exeis diathesi na to metafereis se skoteino ourano! Petros

Kanal, To 12" Dob einai pio eukolo sti metafora... min to sygkrineis me ena C-14 se isimerini basi! (mono ta antibara tha zygizoun oso to 12" sou!) Petros