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Posts for: CraigFair
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Jan 23, 2017 17:56:22   #
mark.r wrote:
A capture of the Rosette Nebula, at prime focus with a Canon 500D and a 8'' reflector. 30x2mins frames 30x2mins darks and 30 bias frames with a CLS filter.Mark

Very nice job Mark. Plenty of details in there.
Craig
 
Jan 21, 2017 11:27:35   #
RLClark21157 wrote:
Phone hand held to eyepiece of 15 inch Newt. First try. At Charlotte's Quest Nature Center - Observatory in Manchester Maryland, Photo by Caroline. Submitted by bob clark. Done at "moon and hot dogs" event, 4 Jan 2017

Very nicely done Bob.
Craig
Jan 21, 2017 11:24:53   #
Marc G wrote:
The Winter is pretty harsh here in the UK, average temperature at night minus 3.
The captured frames I processed in DSS / CS6 & was somewhat disappointed.
Intrigued by the stacking software Sequator & had to attempt another processing session.
So here is my attempt at the Orion Constellation using Sequater & CS6

Equipment: D90 - 50mm F1.8G @ F2.8 - ISO800 - 30s exposure - 125 lights 50 darks

Beautifully done Marc your work with the Sequator is impressive.
Can you tell us what parameters you used???
Craig
Jan 20, 2017 16:12:57   #
Europa wrote:
Thanks, so what you are saying is I should drape a black out curtain over my neighbors house...just kidding but that would work even better. My neighbors lights light up my entire back wall of my house (2 story) all the surrounding trees, even inside my observatory ( bright enough inside I could read a magazine). I still like Sonnys solution to borrow his 22 and shoot the neighbors

My neighbor has ringed his whole yard with a 25w light string. About 80 of them. Looks like a fricken shopping center over there.
Craig
Jan 20, 2017 09:49:29   #
Marc G wrote:
Win 7 pro 64 bit kicked it out, missing dll file, but fault maybe within windows visual 2015 C++
keep you posted if i find a work around

Hey Marc, I had to copy all the file to the same folder.
Craig
Jan 19, 2017 19:21:40   #
Albuqshutterbug wrote:
My windows 10 didn't like that it's from an unknown source. I told it to get over it and it loaded without issue. Just need to find time to learn it.

It's pretty easy if you setup the parameters the way Jim H did.
I got some decent results.
Craig
 
Jan 19, 2017 15:28:03   #
SonnyE wrote:
I downloaded it and when I tried to install it BOTH Windows and Norton stopped it.

Someting smell like last months fish heads...

And I had such high hopes too.....

My antivirus and windows 10 didn't have any problems running the install.
Craig
Jan 19, 2017 13:30:30   #
JimH123 wrote:
I captured this last summer on a nice dark night using a Rokinon 85mm f1.4, set at f2.4. This is using my homemade Sony A-mount adapter allowing me to connect the Infinity to a camera lens. The Rokinon lens is an outstanding lens for doing astrophotography images. You will see that the nebula that is the North America Nebula is just starting to become visible. There are also lights from some pilot who had the nerve to fly through my image. Now there is a way to have the camera throw out such images as it stacks, but I hadn't enabled it. When capturing, the Infinity SW calculates an image quality number which they call FWHM. The low this number is, the better. There is a provision to set a rejection level, and if on any individual image, the number rises above this level, that that image won't be stacked. But I didn't have that feature turned on, so when the plane flew through at just after 450 sec, it stacked it.

But the point of this is that I am finding I am getting better results letting the Infinity SW do the stacking than I am getting from capturing FIT files and doing the stacking myself. Also, the FIT files don't carry color information. Notice also that the Infinity handled the bright star Deneb just fine without blooming such as I have to deal with when using a camera.

I am including both the stacked image, and a snippet from the user manual explaining the image rejection that I spoke about.

I will need to try this again using filters to bring out the nebula and to combine in post. Found this tutorial at Starizona on how to do this: https://starizona.com/acb/ccd/software/ps_hargb.aspx

FYI: Deneb is the center star. The bright star to the top is Omicron1 Cygni (a double star with the the one mashed into it called 30365 Cygni) and to the left Omicron2 Cygni. Then the bright star towards the bottom is Xi Cygni. And to the right and about 2/3 of the way up from the bottom is Sadr. By the way, it is 9 degrees from Omricron1 Cygni to Xi Cygni. And 6 degrees from Deneb to Sadr.
I captured this last summer on a nice dark night u... (show quote)

Beautiful round and defined stars Jim.
Craig
Jan 18, 2017 19:28:51   #
JimH123 wrote:
Yi-Ruei Wu, a cellphone SW engineer in Taiwan, decided to write his own stacker program. He introduced this program last may in the Astronomy section of DPREVIEW.COM.

You can find this free program at: https://sites.google.com/site/sequatorglobal/

One thing I always struggle with (well, maybe not the only thing) is keeping color in the stacks. DSS is notorious for turning images to B&W. I took some images a couple nights ago and here is one of Alpha Persei which is part of a moving group, also known at Melotte 20. This is a small stack of only 8 images, and it stacked the RAWs very quickly and the color is still in the stars. I can find some marching hot pixels (I did this with the ALT-AZ mount which I do when I don't want to fight to get a good polar alignment.)

To the left, you can also see NGC1245, a tiny open cluster.

I also made an image with Starry Night for comparison.

The way this stacker program works, is first you identify a reference image, which is your best image you can find in the stack and then add all the other lights, give it an output file and let it rip. It is quite fast. It allows you to add Noise images and Vignetting images plus there are some questions to answer. See the bottom attachment to show how I answered the questions. I find it works with RAWs. But don't try FITs.

The result was taken to Photoshop where I adjusted the background color as it had a bit too much green. And I lightly did a levels adjust and ended up with this. I was using a Rokinon 135mm f2.0 lens. Shot at ISO 1600 and the sky was not dark enough to expose for more than 15 sec for each image. I also can see some tiny other DSOs in the image, but I haven't tried to figure out what they were. I'm just pleased that my stars still have some color.

Image 4 is also processed with Sequator and is Andromeda. Considering there were only 30 images of 15 sec each, this was about a good as it was going to get. The sky was just not dark enough for longer exposures.
Yi-Ruei Wu, a cellphone SW engineer in Taiwan, dec... (show quote)

Very nicely done Jim I'm going to give Sequator a good try.
Craig
Jan 16, 2017 18:52:12   #
Europa wrote:
This was a stack of 27x200 Second exposures while shooting thru my neighbors 15x1mill watt lights last night

Very well done Brian you are on a roll for sure.
Craig
Jan 16, 2017 18:49:49   #
Albuqshutterbug wrote:
Finally got a chance to shoot the sun again. I had to race the setting sun and trees but it worked out.
This is a 100 photo stack taken with the Skyris 236M.
Also a bird shot just to add variety.

Yeah I'm still around but weather is being a pain.

Very nice Jim I just love your Sun shots.
Craig
 
Jan 16, 2017 18:47:01   #
Europa wrote:
This was a stack of 16x200 Second exposures from last night. This could use a lot more exposure time, but it was capturing some other smaller galaxies as well.

Beautifully done Brian.
Craig
Jan 15, 2017 15:08:12   #
SonnyE wrote:
Hi Ed and Brian,
I'll gladly share what I've got.
Curiousity got the cat... I don't usually go for clusters. But this sounded so different, so I took the challenge.
Now I'll be back. I like oddities... (Birds of a feather...), now that I know I'm chasing this oddity. It will be spotty with this goofy weather we are having.
I ran into the night with only my Light Pollution/Moon Glow (Badder filter) in the stream, I was spending more time experimenting with PHD2, and observing it's effect by changing the sampling timing. I even got out to 10 seconds (10s) with it's sampling. But found 2s, 3s, 5s more to my liking, observed in Stellarium to see the target symbol bobbing around.

Things I need to heed on the next clear evening is to turn on PEC (Periodic Error Correction). Yep, forgot it again. And to try different filters and focusing refinement.


I am getting really serious about building a stepper motor focuser. I have a cart with the goodies at Amazon... Arduino with it USB'd to the laptop, I have an idle cable from my eyepiece camera I can plug right in. Matthew tried to explain that to me about a year ago, but I was still too green. Now I'm green to get it done.
I'm going to PM Matthew with my little list as a last check off.
I do hope the skies give you a break Brian, and your neighbors experience mysterious power outages on clear nights. Do not let it dissuade you. Light pollution to our eyes is not apparent in our cameras and filters. Shoot through the oppositions. I do. Even though there are times I can see the LP, I still bumble ahead anyway.

Sorry, the pictures: Please feel free to download and play with these as you wish. Like the Comet Catalina, I think I'll pursue this now that it has come to my attention. Currently near HIP 37133 (As a marker to find it in Stellarium, or your favorite star chart/finding program.)
Hi Ed and Brian, br I'll gladly share what I've go... (show quote)

Nice process Sonny, you got something there and let us know if you find out what it is.
Craig
Jan 8, 2017 15:11:27   #
Europa wrote:
Stack of 107 - 180 second exposures. Cropped a lot, was playing around to see where I need to frame the image. Will have to retry for the bigger image when the clouds go away.

Really nice work Brian.
Craig
Jan 6, 2017 13:40:46   #
Europa wrote:
Never satisfied...have to keep playing

Nice job on the other 2 galaxies too Brian.
Craig
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