Thursday, January 31, 2008
Monday, January 28, 2008
IC 1848, start of the project
Last night I started a new project with IC 1848.
Here is first Ha exposures, 5x1800s and 7x900s.
I'll shoot more lights for H-alpha and color in near future, if weather allows.
This is a very dimm target for my focal lenght, LX200 GPS 12" @ f6.3
It will need an other five hours of exposures, I think.
Camera: QHY8 cooled 6mb color cam.
Guiding: SXV-AO active optics system
Thursday, January 24, 2008
IC 1805 core, color added
The core of IC 1805 4h of H-a
LX200 GPS 12" f6.3 + SXV-AO (Active Optics system) and famous QHY8
Added 2h of RGB data trough UHC-s filter
WORK FLOW
H-alpha RGB combination method under PS:
Both, H-a and RGB, processed first separetly by usual manner.
H-a converted to RGB format + Blue&Green channels filled with black.
(Reult is a Red image)
Red image is pasted top of the RGB as "lighten"
Red images gamma set to litle bit lighter, about 1,25
Flatten image.
This image is then copyed to top of the original grayscale image in "lighten" mode.
Flatten image.
This image is pasted to top of the RGB Ha combination image and used
as luminance with about 50% opacity.
Color balance + other small tweaking.
Sunday, January 20, 2008
Horsehead nebula
I just found this data from my hard drive.
I shoot this one 25.12.2007, only 1,5 hours of H-aplha light 900s subs.
Very bad seeing, stormy and target was only about 15-20 degree
from horizont.
Lx200 f6.3 + QHY8 + Baader 7nm H-a filter.
Guiding SXV-AO (helpped somehow with extremy bad seeing)
Friday, January 18, 2008
Elephant trunk Nebula, reprocessed
I did this object again from the scratch.
H-alpha blending to the RGB-data was not too good in ealier version.
This time the method was:
R-channel = Ha80% +R
G-Channel = as it
B-channel = Ha15% +B
+
Ha luminance 49%
After this I added some saturation and use the Ha luminance again with 40% opacity+Color balancing. This method is similar to LLRGB method, where luminance data is used twise.
From the Ha data i used only the first 4h and skip the last 2,5 hours, becouse the later data
was effected by strong wind and bad seeing. Partly for that the stars are much tighter.
Active optics was used for both, Ha and RGB, datas.
Bubble reprocessed
This is a last reprocessed Bubble nebula, I promice.
From the scratch this time.
H-alpha luminance and RGB combination is more complicate, than I tought.
80% Ha >R-channel, 15% Ha > B-channel and G-channel 0%
Ha R-channel then used as luminance with 25% opacity.
2h RGB with UHC-s
4h H-alpha 7nm
More natural appearance this time, I think.
Monday, January 14, 2008
QHY8 Narrowband information, update
Sunday, January 13, 2008
Narrow Band with UHC-s and H-alpha????
This is a very interesting test run!
I started to think, if I use UHC-s filter to capture colors to my H-alpha
luminens, what other information UHC filter might captured?
The UHC-S filter is a multi bandpass filter made so that only some portions of light in the visual the spectrum are transmitted. This UHC-S will pass a total of about 100 nanometers within the 400 to 700 nma range, with high percentages of transmission of that light in the portions of the spectrum commonly emitted by emission or diffuse nebula
Here is the spectral responce curve for the filter.
As you can see there is spike at about 500 nm containing both O-III and H-Beta, In singleshot camera those bands are ending up partly to Green and Blue channels!!!There is lots of H-alpha as well, but we are not interested about that, becouse we have separate 7nm H-a filter data. So this is a background and here are few samples what can be archived with that data.
This is a very first test run and there is lots of things to test, but it looks promicing so far.
All images have been taken with QHY8, a sigle shot cooled 6mb astro camera.
original H-alpha 16 x900s + 5 x 1800s light frames used.
Total exposuretime about 6,5 hours.
LX200 GPS 12" f6.3 + SXV-AO (Active Optics system) Elephants trunk nebula in IC 1396
This is pure RGB data with Baader UHC-filter 5x900s
Final RGB image, combined from previous images.
Lights: 5x1800s + 15x900s @H-alpha Color data: 5x900s UHC-s filter combined as HaR(Ha)GB
Hubble palette test from the same original data RGB > BRG and some color balancing
Modified palette test from the same original data
Here is the same method used for the Bubble nebula image
Original RGB data.
Exposure time is 4h for H-a and 2h with UHC-s filter for RGB.
HaR(Ha)GB image is combined from the data.
Modified Hubble palette from the same material as the original RGB
Palette variation from the same data
I hope, that someone else will test this method and report here about findings.
All comments and opinions are welcome.
Saturday, January 12, 2008
weather = %666¤@£´&&%##¤
Days are short, but weather does not give any support.
Daylight time at the moment only 4h 44mins.
Friday, January 11, 2008
Bubble with new color II
This is the new color version of the Bubble Nebula.
I tested a new method for me. After normal processing I added
"Shadow and highlights" command under PS to red channel only.
33% shadows and 20% highlights at 50% range.
There is now much more red nebulosity visible in the image with no extra noise. Compare this one to previous one. Sunday, January 6, 2008
Saturday, January 5, 2008
Thursday, January 3, 2008
IC 1396 with new light.
I shoot more lights for this sculpture like object.
Now there is 16 x900s + 5 x 1800s light frames used.
Total exposuretime about 6,5 hours.
LX200 GPS 12" f6.3 + SXV-AO (Active Optics system)
Elephants trunk nebula in IC 1396 with H-alpha light.
Tuesday, January 1, 2008
New Years Flaming Star Nebula 2008
Flamin Star nebula
Imaging scope LX200 GPS 12" f6.3.
Camera, QHY8
Guiding SXV-AO and LodeStar 10Hz
Only two hours of H-alpha (6x1200s, 7nm), there was some major technical problems.
Color data 4x900s, UHC-filter
Color version HaRGB, 6x1200s H-a + 4x900s RGB
H-alpha 6x1200s
Happy New Year 2008!
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