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21 frames of 5 second exposures at iso 800 50mm F1.8 No clue what the bortle level is where i'm at. but the light pollution is REALLY bad.
untracked on a tripod.
Milkyway is barely perceptible naked eye with averted vision as a faint cloud band going up from the horizon towards the zenith. No detail. very few stars in it. (Maybe 20 to 50 stars along and around it.)
Very annoying vignetting that was extremely hard to remove. Sorry. I tried to fix it as best I could. but it would not cooperate. this is as much as im able to process the photo because of the extreme vignetting.
Maybe someone else could take a stab at my unprocessed raw stack?
Attachments
Svbony SV503 70mm ED F6 420mm FL refractor telescope (New)
Canon EOS 100D/SL1
Tamron 18-200mm F3.5-F6.3 II VC lens
canon 50mm STM F1.8
svbony 8-24mm zoom eyepiece
svbony goldline 66 degree 9mm and 6mm + 40mm plossl + 2x barlow.
svbony UHC 1.25 filter + astromania 1.25" O-3 filter + also an svbony H-B filter.
good job,i'm guessing, lagoon bottom right, omega and eagle nebula at the top. check if your processing software has a function called "backgroundextraction" this should in some cases full remove the vingetting or significantly reduce it . flat frames are recommended, but they are anoying ..
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .
realflow100 wrote: ↑Fri May 07, 2021 9:38 am
21 frames of 5 second exposures at iso 800 50mm F1.8 No clue what the bortle level is where i'm at. but the light pollution is REALLY bad.
untracked on a tripod.
Milkyway is barely perceptible naked eye with averted vision as a faint cloud band going up from the horizon towards the zenith. No detail. very few stars in it. (Maybe 20 to 50 stars along and around it.)
Very annoying vignetting that was extremely hard to remove. Sorry. I tried to fix it as best I could. but it would not cooperate. this is as much as im able to process the photo because of the extreme vignetting.
Maybe someone else could take a stab at my unprocessed raw stack?
This is a very good result from such a light polluted sky. If you stop the lens to f2.8, increase the shutter speed to 10s, exposure will be about the same but vignetting will be much less. Depending upon the camera body & its noise characteristics, you could also increase to ISO1600, 10s, f4 for even less vignetting.
Joe
Amateur astronomer since 1978...................Web site :http://joe-cali.com/ Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80. Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's. Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12 Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec. Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
star trailing will be too much at 10 seconds with apsc crop. 5 seconds already has slightly noticable star trails.
I usually just shoot wide open to get as much exposure as possible with least noise. takes the shortest time. instead of stopping down. I mean I have an F1.8 lens I might as well use the whole aperture right? lol
Fitswork doesnt have background extraction it has some various background flattening options. but they dont work very well when the vignetting is really extreme or crazy wild. Or when the DSO/target is filling most of the screen.
Svbony SV503 70mm ED F6 420mm FL refractor telescope (New)
Canon EOS 100D/SL1
Tamron 18-200mm F3.5-F6.3 II VC lens
canon 50mm STM F1.8
svbony 8-24mm zoom eyepiece
svbony goldline 66 degree 9mm and 6mm + 40mm plossl + 2x barlow.
svbony UHC 1.25 filter + astromania 1.25" O-3 filter + also an svbony H-B filter.
