Our Beautiful Universe - Photos and Videos

Andy Resnick

Science Advisor
Education Advisor
Insights Author
7,252
1,610
@Andy Resnick & were the TIFF's 8 bit per channel (24 bit)? I ask because if the TIFFs were 8 bit per channel you potentially lost a lot of sensor data in the RAW->TIFF conversion. Would you ever consider sharing one of the RAW files so I could take a look at it with my image conversion software? A lot of Camera RAW files are 14bit or 16bit per channel.
Well.... I ran a thread about this a while ago (https://www.physicsforums.com/threads/astro-image-stacking-optimize-dss-image-stacking-and-post-processing.963947/). I'm happy to send you a RAW image to play with- PM me with details.

The 14-bit RAWs are most likely converted into a 16-bit/channel TIFF before stacking. The stacked TIFF has a 32-bits/channel format, but in reality there's about 23-bits/channel of information. The magic happens when compressing to a 16-bit/channel TIF for non-Deep Sky Stacker post processing, for example denoising. The final step is another compression to 8-bit/channel which I save as a jpg because filesize.
 
111
86
Thank you... can I ask yet. which method of photographing you use: Camera Body atached by bajonet to eyepiece or another ?
thanks and lot of succes :thumbup: :smile:
 

davenn

Science Advisor
Gold Member
8,772
5,854
I took these this morning about 2:35a Pacific Time, along I-5 somewhere between Red Bluff and Corning, California, USA. A 14-24mm Nikon Lens @ 14mm was used with 2.8f, 10sec, 2000iso, all single frame RAW captures on nikon D800 body with approximately the following Adobe Lightroom RAW->JPG conversion settings:

Temp: 4637k
Tint: +2
Exposure: -0.97
Contrast: +87
Highlights: -100
Shadows: +100
Whites: +73
Blacks: +100
Clarity: +22
Dehaze: -1
Vibrance: -61
Saturation: -40

It was a moonless sky looking towards the southwest.

galaxy.gif


location.jpg
 
Last edited:
111
86
Hi Dave and thank you for answer. How much cost approx. this Nikon 400mm telephoto lens?

Hi:smile:
 

pinball1970

Gold Member
521
432
 

davenn

Science Advisor
Gold Member
8,772
5,854
Hi Dave and thank you for answer. How much cost approx. this Nikon 400mm telephoto lens?
Hi Bruha

not sure offhand, I'm a Canon user
Do a google search of/visit camera shops in your area :smile:
 
Meteors images 2 and 4? Edit: oops yes you note it yourself.
Great images
Thank you. In #2 I was looking up at the sky during the 10sec exposure so I saw it with my own eyes... quite bright and the light was bluish in color to my eye. Earlier on I had been driving and right through the windshield I saw a bright blue streak, then the whole sky lit up and afterwards there was a reddish streak across the sky... pretty impressive but I didn’t catch that one on film. I think there’s also at least one satellite in image #5 and a very faint satellite in image #3.

edit:

in image #3.
AAAC87F1-3304-44B4-BF83-A2D704B5D4C3.png


E1DAAFF0-76FC-4C06-9DAE-7FC9AFBFFC49.png
 
Last edited:
111
86
HI and thank you. (it is not my level :frown: :wideeyed:)
 

Andy Resnick

Science Advisor
Education Advisor
Insights Author
7,252
1,610
Latest panorama using my 105mm lens, of the constellation Cygnus:

center 7_31_19_1h 10m - right 9_1_18_31m-2.jpg


Each exposure was 30 s, ISO 200 @ f/2- that's about the maximum aperture I am still able to get reasonable flat correction- and each stack (there are 6) is about 1 hour total integration time. Color balancing is still uneven, but significant improvement compared to last year. Assuming you are viewing this at a comfortable distance, I could print this image 12 feet across and, at a comfortable viewing distance, you would see this level of detail at the little dark blob just to the left of the North American Nebula:

center 7_31_19_1h 10m - right 9_1_18_31m-2.jpg



 
111
86
Hi it is really amazing, (how you can get this star density and these collors?) .

I attach sample of movie record of clouds passing over the sun... ó I see it is not allowed attach mp4... :))
 
111
86
Hi,
I attach my last attempt of Jupiter with Bresser HD (web) camera
I did not manage to capture Saturn by this camera up to now.
:smile::wideeyed:

Lot of succes
 

Attachments

Andy Resnick

Science Advisor
Education Advisor
Insights Author
7,252
1,610
Star trails using my 15mm lens:

Monday_MAX_Stack-2.jpg


and a close-up of Polaris, located 0.736 degrees off Earth's rotation axis:

Monday_MAX_Stack-1.jpg


The diagonal line was created by a passing plane.
 

Want to reply to this thread?

"Our Beautiful Universe - Photos and Videos" You must log in or register to reply here.

Related Threads for: Our Beautiful Universe - Photos and Videos

Replies
2
Views
3K
  • Posted
Replies
10
Views
3K
  • Posted
Replies
3
Views
3K
  • Posted
Replies
8
Views
3K
  • Posted
Replies
12
Views
2K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top