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02/07/2004 02:18:02 PM · #1 |
I finally had the chance to take the telescope out list night, it was cloudy when I got there but the clouds did break up and allow for some nice viewing.
also I took a few images..
Moon
M42 (The great Orion Nebula)
shot details are on the image page when you click the thumbnail
James |
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02/07/2004 03:09:24 PM · #2 |
nicely done - why stack so many shots?
noise?
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02/07/2004 03:14:30 PM · #3 |
When you do a "stack", I assume you must leave the manification and thus the image size the same and the software syncs the stack? Could you explain the concept? Your shot are great. What telescope? Again, great shots.
David P
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02/07/2004 03:38:55 PM · #4 |
thanks guys, stacking is done to get more detail, sometimes more noise is introduced with longer exposures, but it can help get rid of noise as well.
For the moon shot I used a program called Registax, its free and works well. All images must be the same size and with this program you pick one spot on the image for a referance point and it looks for that same point on all images and stacks them automatically. It will let you know if the allignment is off and you can make adjustments.
For the orion shot I used Ulead Photo impact and manually stacked them, this is ok, and does a fair job, plus I have only done it a few times. I have another program called ImagesPlus (on my home PC) that does a great job as well and will do a lot more than Ulead (or photo shop) can as far as stacking an combining images.
I used my Canon D60 connected to my Celestron 80mm spotting scope (400 mm @ f5) and all that was mounted on my Meade LX-90 telescope on a wedge for proper tracking of the objects.
To get the focus correct on orion, I conected my camera to the laptop and used the canon remote capture to take a pic and view it ont he laptop right away. It took me 7 shots to get te focus where i wanted it.
James
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02/07/2004 03:51:01 PM · #5 |
here is a single moon image compared to a stacked moon image
Single image. This is one of the original images used in the stacking process>
10 Images stacked
only sharpening was done to each image. Notice the sharper detail in the stacked image
James
Message edited by author 2004-02-07 15:52:21. |
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02/07/2004 04:13:06 PM · #6 |
What great photos. Did you have to get out of the Houston area? I noticed it was pretty clear last night, but we always seem to have a bit of haze in Houston.
Very nice shots, I was equally impressed with The great Orion Nebula-wow. |
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02/07/2004 04:17:50 PM · #7 |
I go out the brazos bend state park. I usually volunteer at the George observatory (inside brazos bend bend state park) with my telescope on Saturday nights for public star parties, but its been since September since i have been there.
I like to set up in the late arrival area at the front of the park. Its about as dark ans you can get for the Houston area.
Have you ever been out there??
James |
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02/07/2004 04:38:08 PM · #8 |
| Yes, I have been there a couple of times. Just driving through after business trips down south. Its a wonderful park, and next time head down that way will bring my camera for sure. |
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02/07/2004 04:39:42 PM · #9 |
You lost me with all your lens combinations. How much would all that amount to on a single camera, in mm?
In getting a 2x telephoto on top of my 5x zoom. I'd like to know how much I'll be able to resolve on the moon with my 10x setup (380mm, I think).
Nice Nebula! I'm amazed! |
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02/07/2004 04:43:53 PM · #10 |
i have a celestron scope - is the camera mount available for all models do you know? thanks for the stacking info...
here is a photo of mine from 2-5-2004 using a 75-300mm handheld
for an idea on how much zoom you need...
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02/07/2004 04:49:26 PM · #11 |
Originally posted by jab119:
10 Images stacked
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Fascinating stuff, James..
On the bottom-right of the moon it looks very hilly, but the top looks fairly smooth. Is the moon actually this bumpy? I guess the top-right edge is lacking detail, rather than the bottom-left adding too much?
Thanks for sharing. |
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02/07/2004 04:53:19 PM · #12 |
Soup, I have the EOS T-Mount (or T ring)
Celestron & D60
this little celestron I have has built in threads that the EOS T mount screws onto.
labuda
im lost in the 2x to mm conversion..but when using my sony 707 @ 5x with the sony teleconverter I was able to get some decent moon shots
James
Message edited by author 2004-02-07 16:54:22. |
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02/07/2004 05:00:22 PM · #13 |
Here is one that I did a few months ago. I shot it out my second story bedroom window. I live in the suburbs of Toronto. This image was taken with a Nikkor 1,000mm catadioptric (mirror) lens with a x2 converter on a D1x body. Total effort about 15 minutes or so.
There is a bit of Photoshop post-processing to enhance the contrast and colour to further emphasis the texture of the lunar surface.
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02/07/2004 05:21:42 PM · #14 |
Originally posted by Morgan:
Here is one that I did a few months ago. I shot it out my second story bedroom window. I live in the suburbs of Toronto. This image was taken with a Nikkor 1,000mm catadioptric (mirror) lens with a x2 converter on a D1x body. Total effort about 15 minutes or so.
There is a bit of Photoshop post-processing to enhance the contrast and colour to further emphasis the texture of the lunar surface. |
You should put that one for sale in your print store if you have one.
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02/07/2004 05:35:50 PM · #15 |
Originally posted by hsteg:
Originally posted by Morgan:
Here is one that I did a few months ago. I shot it out my second story bedroom window. I live in the suburbs of Toronto. This image was taken with a Nikkor 1,000mm catadioptric (mirror) lens with a x2 converter on a D1x body. Total effort about 15 minutes or so.
There is a bit of Photoshop post-processing to enhance the contrast and colour to further emphasis the texture of the lunar surface. |
You should put that one for sale in your print store if you have one. |
Thank you for the kind compliment. But, I do not sell my prints. However, I do not mind giving them away if someone wants one for personal use. But, I still retain all intellectual and creative rights to my work.
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02/07/2004 06:12:26 PM · #16 |
Originally posted by jab119:
I finally had the chance to take the telescope out list night, it was cloudy when I got there but the clouds did break up and allow for some nice viewing.
also I took a few images..
Moon
M42 (The great Orion Nebula)
shot details are on the image page when you click the thumbnail
James |
James, very nice images. This is exactly what I was thinking of when I asked whether we could allow multi-image stacks for the advanced editing challenges. I would love to see this as an allowed technique; it has such a long history in astrophotography, and would help those with noisier cameras on night shots as well. Hopefully we can get this considered at some point...
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02/07/2004 06:47:40 PM · #17 |
Excellent images, particularly of the the Great Orion Nebula (M42). Compared to the pre-digital era that is an outstanding exposure considering the setup and exposure times.
It is amazing what affordable digital technology is capable of.
Image stacking is a great technique for significantly improving resolution in amateur astronomy photography.
Great work!
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