AstroBobo
sage
Reged: 07/04/07
Posts: 395
Loc: Zagreb, Croatia
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Hello all,
Here's finally a processsed version of my M42 shot on Fuji Provia 400X. This is a combination of three exposures - 1, 6 and 40 minutes. This is just a crop of the central part of the FOV - I messed up making the flat field in PixInsight, so the edges are horrible.
Here you can see I managed to capture some of the outer faint nebulosity. I'll definitely try shooting with E200!
Oh yes, the telescope is a Pentax 105 SDP.
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Boris Stromar : AD Infinitum member : Zagreb, Croatia, Europe
P75SDHF : P105SDP : MN71 : CGE : STL-11000
http://www.astrobobo.net
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ZachK
professor emeritus
Reged: 08/21/05
Posts: 667
Loc: Israel
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really nice, I have a bunch of 400F left, but when I run out I may try the 400X (unless I am doing 4x5 fully at that time, in which case its all moot.
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Zach Kessin
Yesha Israel
Meade ETX 127 Mak-Cass
15x70 Celestron Skymaster Binoculars
Sinar F 4x5 view camera
Rolliflex Camera 80mm F2.8
Pentax K-1000 Camera 35,50 and 60--300mm zoom
3 kids, Large cat, small dog
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ClownFish
Post Laureate
Reged: 04/26/05
Posts: 5600
Loc: Islamabad, Pakistan
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Excellent!! You caught a good deal of the faint outer nebulosity, which gives the bright core an almost cocoon appearance. And a very nice job stacking the three - you have good detail of the brighter inner core! Very nice!
CF
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Learn all about POLAR ALIGNMENT with my Drift Method Tutorial and simulator!! Or visit my Foreign Service Blog!
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bobalex
sage
Reged: 02/24/07
Posts: 431
Loc: Western Pennsylvania
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Very beautiful photograph!
Bob
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10 inch Meade GPS Schmidt-Cassegrain
100 mm F-6 Orion refractor
60 mm F-15 Refractor w/Lumicon HA Filter
4.5 inch F-4 Orion Starblast reflector
80 mm short tube Orion refractor
Adirondak Stellacam EX Video Camera
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Nebhunter
Pooh-Bah
Reged: 10/04/03
Posts: 1010
Loc: Frostbite Falls
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I really like your image. Well captured. I've been wondering about stacking slide exposures as well. I have been led to understand that the Provia will capture more of the blue, green compared to E200, which is supposed to be king of the red???
I've got E200 coming as well to try. I've shortened my exposure time on open clusters, and hope to post them shortly. I like the very dark background which really contrasts the star colours. That's why I really like yours. Did the stacking of 1 minute give you that background or was that due to processing? Going longer on clusters than 10 minutes with Provia 400 does bring out some faint stars, but the background starts to lighten up bringing out the blue - purple colour.
You might be onto something with the stacking. Who knows - it might callenge the digital buys. Combining images with HA filters, or Minus Violet? Worth experimenting.
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Handle me with Care - The Traveling Wilburys.
TEC 140 "Katyusha" - Tec field flattener. Equinox 80 -
Atlas EQ6 SynScan GPS ADM conversion. ST-4 guider.
PENTAX 67 - 400 EDif - 300 - 200 - 135 - 90 lenses.
OM-1 300 Tamron - Konica 35-100 Varifocal STI Pro Stiletto.
http://nightfly.zoomshare.com/
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AstroBobo
sage
Reged: 07/04/07
Posts: 395
Loc: Zagreb, Croatia
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Quote:
I have been led to understand that the Provia will capture more of the blue, green compared to E200, which is supposed to be king of the red???
That's true.
Quote:
I like the very dark background which really contrasts the star colours. That's why I really like yours. Did the stacking of 1 minute give you that background or was that due to processing?
No, I only used the 1 and 6 min exposures for M42 core which was overexposed in the 40 minute exposure. The background was corrected in PixInsight. You say it looks very dark but that may be different on different monitors. Juct before I processed this photo I calibrated my 21" Samsung LCD with Spyder2 hardware calibrator. Here at work the background looks much lighter.
Quote:
You might be onto something with the stacking. Who knows - it might callenge the digital buys. Combining images with HA filters, or Minus Violet? Worth experimenting.
Definitely! HA will help but MV is good only for achromats, IMHO. I'll try stacking E200 shots in future exposures. The main problem in film astrophotography is the long exposure times which require perfect tracking. Short sub exposures with DSLR's are very convenient 
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Boris Stromar : AD Infinitum member : Zagreb, Croatia, Europe
P75SDHF : P105SDP : MN71 : CGE : STL-11000
http://www.astrobobo.net
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RALF_T
super member
Reged: 11/07/06
Posts: 127
Loc: Europe, Germany, Hamburg
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Hi Boris,
very good overview with faint surrounding details! It looks here on my laptop a little bit bluish. May be calibration is not as it should be... 
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Clear skies, Ralf
http://astrofilm.surfino.info/
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tommyhawk13
sage
Reged: 09/28/07
Posts: 492
Loc: Jacksonville, Fl
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Great image!
What is your opinion of 400x vs. 400F?
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Meade Starfinder 8,Meade SN-8 OTA, Orion Atlas, and a handfull of film cameras
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novbabies
Postmaster
Reged: 06/05/05
Posts: 15678
Loc: Northern Georgia!
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Boris, fabulous image  !!
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Good Seeing!
Mark
Orion 12" XTi f/4.9
VERY old Edmund 6" f/8 reflector
Assorted binoculars
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AstroBobo
sage
Reged: 07/04/07
Posts: 395
Loc: Zagreb, Croatia
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Quote:
Hi Boris,
very good overview with faint surrounding details! It looks here on my laptop a little bit bluish. May be calibration is not as it should be...
Indeed it's bluish but that's the film's response..it does not record red as well as E200.
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Boris Stromar : AD Infinitum member : Zagreb, Croatia, Europe
P75SDHF : P105SDP : MN71 : CGE : STL-11000
http://www.astrobobo.net
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AstroBobo
sage
Reged: 07/04/07
Posts: 395
Loc: Zagreb, Croatia
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Quote:
Great image!
What is your opinion of 400x vs. 400F?
Thanks!
400X seems to really have smaller grain, just as Fuji says. Fuji also claims more vivid colors, but this is hard to verify on astronomical objects
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Boris Stromar : AD Infinitum member : Zagreb, Croatia, Europe
P75SDHF : P105SDP : MN71 : CGE : STL-11000
http://www.astrobobo.net
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ClownFish
Post Laureate
Reged: 04/26/05
Posts: 5600
Loc: Islamabad, Pakistan
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I'm going to see if I can find some here in Pretoria. On 8 December I will get my first chance to do some AP since October, 2005! Can't wait!
CF
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Learn all about POLAR ALIGNMENT with my Drift Method Tutorial and simulator!! Or visit my Foreign Service Blog!
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s58y
Post Laureate
Reged: 12/12/04
Posts: 4850
Loc: Eastern NY
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Excellent pic. The running man came out really well. I also like the extra wide FOV provided by the 35mm film.
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Hutech 30D, SBIG ST-402 autoguider
SV80S, SV66 guidescope
AP900, G-11, Barndoor tracker
http://www.pbase.com/s58y
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Nightfly
super member
Reged: 06/20/07
Posts: 199
Loc: Sullivan, Maine
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Boris,
Excellent work! Looks like a good galaxy film with the blue response. Try it on the Andromeda, I would like to see that! Again, great job. I have a 120 roll of 400X I hope to run through in December.
Jim
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Jim Cormier
Sullivan, Maine, USA
www.nightfly.zoomshare.com
Pentax 67 with 55, 105, 165, and 300mm lenses
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vikingcraftsman
Carpal Tunnel
Reged: 02/24/05
Posts: 1883
Loc: Long Island, N.Y.
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Get to bed early on the 8th of December because the 9th is vikingcraftsman birthday. And you know CF the world stands still for 30 seconds for that.
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Vikingcraftsman
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ClownFish
Post Laureate
Reged: 04/26/05
Posts: 5600
Loc: Islamabad, Pakistan
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CF
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Learn all about POLAR ALIGNMENT with my Drift Method Tutorial and simulator!! Or visit my Foreign Service Blog!
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AstroBobo
sage
Reged: 07/04/07
Posts: 395
Loc: Zagreb, Croatia
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Quote:
Excellent pic. The running man came out really well. I also like the extra wide FOV provided by the 35mm film.
Actually this was shot on 6x7 format. I cropped it because of bad flat field correction I did in PixInsight. The "real" FOV extends to the Horsehead nebula!
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Boris Stromar : AD Infinitum member : Zagreb, Croatia, Europe
P75SDHF : P105SDP : MN71 : CGE : STL-11000
http://www.astrobobo.net
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