Galaxies in Leo

CCD vs Film? Lots of time vs no patience? Alright, this is your place to discuss all the astrophotography what's and what's not. You can discuss about techniques, accessories, cameras, whatever....just make sure you also post some nice photos here too!
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boothee
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Galaxies in Leo

Post by boothee »

Last night I tried to take some picture of Galaxy. Not a good one but able to grab some galaxies which seems like galaxy in picture. :mrgreen:

I don't know why I got really bad vegnetting effect on my picture. I try to make it disappear in Light Room 1.3 but help only a bit. Any tips?

Image

Telescope: 254mm, Newtonian Reflector on EQ5 with Dual Drives
Camera: Canon EOS300D unmoded
Exposure: 120s x 14
ISO: 400
Unguided
Shutter release with china made wireless remote (Very convenient and it cost only around 15USD)
Light, Dark & Bias stacked in DSS.
Edit in CS3 and Light Room 1.3

Clear Skies!

:)
boothee
1150mm, 254mm, Newtonion Reflector on EQ5 Mount with dual axis DK3 drive, QHY5 Camera, Canon 300D + Kit Lens, Yangon, Myanmar.
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universe24
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Post by universe24 »

every optical system should have little of vignetting effect. It may due to the illumination FOV is not big to cover the APS size of DSLR chip. It also may due to the secondary mirror is not big enough....
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Tachyon
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Post by Tachyon »

I also noticed some coma. Perhaps you can just frame the image in the center and crop it?
[80% Steve, 20% Alfred] ------- Probability of Clear Skies = (Age of newest equipment in days) / [(Number of observers) * (Total Aperture of all telescopes present in mm)]
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boothee
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Post by boothee »

Thanks for your kind suggestion. The above picture is a centered and cropped version like you suggested. :mrgreen:

Clear Skies!

:)
boothee
1150mm, 254mm, Newtonion Reflector on EQ5 Mount with dual axis DK3 drive, QHY5 Camera, Canon 300D + Kit Lens, Yangon, Myanmar.
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Meng Lee
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Post by Meng Lee »

Hi,

Just 2 rounds of Russell Croman's Gradient Xterminator will resolve it.

Meng Lee
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Airconvent
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Post by Airconvent »

Never mind the finetuning Boothee..these are quite good for a first effort!
I'm sure many gurus here can give you tips to do it even better next time. [smilie=admire.gif]
The Boldly Go Where No Meade Has Gone Before
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boothee
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Post by boothee »

Thank you so much for your kind suggestions and comments!

I still don't get chance to change or upgrade my telescope. :D

"Russell Croman's Gradient Xterminator". Took note. I'll try very soon.

Clear Skies!

:)
boothee
1150mm, 254mm, Newtonion Reflector on EQ5 Mount with dual axis DK3 drive, QHY5 Camera, Canon 300D + Kit Lens, Yangon, Myanmar.
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weixing
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Favourite scope: Vixen R200SS & Celestron 6" F5 Achro Refractor
Location: (Tampines) Earth of Solar System in Orion Arm of Milky Way Galaxy in Local Group Galaxies Cluster

Post by weixing »

Hi,
WOW! Nice! :D Will sure want to try to take those during the Chinese New Year holiday.

Anyway, you can take and applied flat frames and it should remove the vignetting, but not the sky gradient.

Have a nice day.
Yang Weixing
:mrgreen: "The universe is composed mainly of hydrogen and ignorance." :mrgreen:
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boothee
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Post by boothee »

Hi,

Here is the tested picture of the above picture using Russell Croman's Gradient Xterminator recommend by Meng Lee.

I think the software is quite nice. I think it looks definitely better.

But I've over processed in CS3. So picture looks a bit dark & noisy. :P


Image


Clear Skies!

:)
boothee
1150mm, 254mm, Newtonion Reflector on EQ5 Mount with dual axis DK3 drive, QHY5 Camera, Canon 300D + Kit Lens, Yangon, Myanmar.
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zackae
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Post by zackae »

wow I see colour!
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