----------------------------------- Emil 25 Aug 2012 21:59 NGC 6992 H-alfa ----------------------------------- Echipament: Montura: EQ-6 SkyScan Pro prin EQMOD Foto: TS ED-APO 90/500 mm cu QHY9M @ -15°C Ghidaj: Celestron 102SLT 102/660mm cu Atik 16IC Expuneri - filtru H-alfa 6 nm Astrodon: 42 x 900 sec. Stackare DeepSkyStacker, postprocesare PS. Mozaicul e lesinat rau, nu iasa cum vreau eu si pana la urma m-am lasat pagubas si am mers pe zona centrala dar pana la urma la stack am bagat toate cadrele. ----------------------------------- alex1209 25 Aug 2012 23:12 ----------------------------------- frumooos!!! :) sigur nu erau niste nori prin preajma? :mrgreen: ----------------------------------- nobody 25 Aug 2012 23:35 ----------------------------------- Hai Emil. nu te mai scuza, ca oricat incerci s-o dai in bara, tot cu detalii incredibile iesi :lol: Ar trebui scoase gradientele si normalizat background-ul intre imagini. Se mai poate merge si pe metoda fotometrica. Also, if the images there taken under varying conditions (variable integration time, variable atmpospheric transmission, etc), it may be necessary to balance the backgounds and dynamic range of each images prior building the mosaic. The commands OFFSET, MULT, NOFFSET (offset normalization of the background to a given value), NGAIN (gain normalization ot the background) are the basics tools for balance operations. This require also measuring the levels of background and/or stars in the overlapping regions. Use the cursor information, or statistics function (contextual menu or STAT console command). http://www.astrosurf.com/buil/iris/tutorial6/doc19_us.htm http://www.astrosurf.com/buil/iris/tutorial2/doc11_us.htm ----------------------------------- Catalin Paduraru 26 Aug 2012 19:47 ----------------------------------- Superba imaginea. ----------------------------------- psemil 27 Aug 2012 12:54 ----------------------------------- Frumos... ----------------------------------- sabin fota 27 Aug 2012 17:30 ----------------------------------- ca de obicei, jos palaria ----------------------------------- Vlad 27 Aug 2012 21:53 ----------------------------------- Sehr schön, intr-adevar! :D Inevitabil imi amintesc ca am vazut nebuloasa asta acum o saptamana printr-n un tub de 50cm Se vedea aproape la fel... ----------------------------------- auriga 29 Aug 2012 05:13 ----------------------------------- Sehr schön, intr-adevar! :D Se vedea aproape la fel... @vlad, presupun ca doar zona centrala sau si filamentele exterioare? cu/fara filtre? ----------------------------------- Vlad 29 Aug 2012 11:13 ----------------------------------- Si filamentele, cu un filtru - nu-mi amintesc exact ce filtru, cred ca ceva gen UHC sau alt filtru asemanator de nebuloase. cu un binoviewer, a fost o adevarata excursie prin tot valul, care nu se mai termina.. Cand te uiti printr-un asemenea monstru la un obiect cum este valul, incepi sa urmaresti unul din filamente si pana la urma te pierzi :)