Advance Photography Terms
May 16, 2021 20:46:54 #
I have an old high school friend who now lives in Tucson and we trade pictures back and forth; sunsets/sunrises, scenery mostly. She has a boyfriend who is really interested in astrophotography and the stars. She sent me one of his along with his comments about it wherein he mentioned the following: “4-frame mosaic, "Art" lenses, no obvious gradients after subtracting and flat fielding in Sequator, APOD.”
I have no idea what he means by those terms, can anyone give me a layman’s summary of what he’s doing to to photographs like this.
PS the image I received has deteriorated so much the star pinpoint are not sharp, but on their end it is.
I have no idea what he means by those terms, can anyone give me a layman’s summary of what he’s doing to to photographs like this.
PS the image I received has deteriorated so much the star pinpoint are not sharp, but on their end it is.
May 16, 2021 21:09:08 #
I have little to no idea. Having admitted to that lack of knowledge, I will be most interested in responses by those in the know.
May 16, 2021 21:10:55 #
LTImbeau wrote:
I have an old high school friend who now lives in ... (show quote)
Why not ask the boy friend?
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May 16, 2021 21:50:01 #
fjdarling
Loc: Mesa, Arizona, USA
Suggest you scroll to the bottom of this page, select "All Sections" and scroll down to the "Astronomical Photography Forum" section. The folks with that knowledge will likely find your post quicker there. Good luck.
May 17, 2021 00:23:14 #
May 17, 2021 05:09:49 #
Sigma ART series lenses? These are excellent and highly regarded. No idea about the others.
May 17, 2021 07:19:27 #
APOD: Astronomy Picture of the Day
https://apod.nasa.gov/apod
Sequator: free software which can track stars on multiple images, align stars and stack them. If you don't have an equatorial mount, by stacking non-blur star images in short-time exposures, the result will be almost similar to long-exposure on an equatorial mount.
Flat fielding: https://skyandtelescope.org/wp-content/uploads/documents/Flatfields+Mar11.pdf
The Astro section of UHH, as recommended earlier:
https://www.uglyhedgehog.com/s-109-1.html
.
https://apod.nasa.gov/apod
Sequator: free software which can track stars on multiple images, align stars and stack them. If you don't have an equatorial mount, by stacking non-blur star images in short-time exposures, the result will be almost similar to long-exposure on an equatorial mount.
Flat fielding: https://skyandtelescope.org/wp-content/uploads/documents/Flatfields+Mar11.pdf
The Astro section of UHH, as recommended earlier:
https://www.uglyhedgehog.com/s-109-1.html
.
May 17, 2021 07:22:05 #
tcthome
Loc: NJ
If you don't mind me guessing. The mosaic thing is probably 4 photos stack or composited or both., which is just a way of adding them all together to get the desired photo that the camera couldn't in with one photo. Art lens= Sigma , the third party lens maker has a Art name series of lens & is most likely what he is talking about. Lens Baby also makes lens for artistic purposes but usually for different effects like partially out of (or soft) focus & would most likely not be used for night sky type photos. Have fun.
May 17, 2021 07:32:05 #
LTImbeau wrote:
...
...
...
PS the image I received has deteriorated so much the star pinpoint are not sharp, but on their end it is.
...
...
PS the image I received has deteriorated so much the star pinpoint are not sharp, but on their end it is.
"Deteriorated"?? what do you mean?
Certainly not by sending it.
Sharp on their end but not on yours???
Very confused.
May 17, 2021 07:42:28 #
RWR
Loc: La Mesa, CA
LTImbeau wrote:
He’s gone back to his Illinois summer home and I don’t know him.
Does your friend know him?
May 17, 2021 07:43:34 #
RWR wrote:
Does your friend know him?
Have your friend forward the question(s).
May 17, 2021 09:00:00 #
LTImbeau wrote:
I have an old high school friend who now lives in ... (show quote)
I found "Ps deteriorated" more confusing than the technical talk. What, a JPEG file was edited and saved 50 times. Or reduced in size for likely poor reasons from say 5MB to 100KB? Digital image files do not change simply by the passage of time like film or paper prints. I think a few other people figured out the rest of it. Only one that I still don't understand.
May 17, 2021 09:26:18 #
lamiaceae wrote:
I found "Ps deteriorated" more confusing than the technical talk. What, a JPEG file was edited and saved 50 times. Or reduced in size for likely poor reasons from say 5MB to 100KB? Digital image files do not change simply by the passage of time like film or paper prints. I think a few other people figured out the rest of it. Only one that I still don't understand.
I think it was intended as P.S. -
(aka Post Script)
May 17, 2021 10:52:29 #
Longshadow wrote:
I think it was intended as P.S. -
(aka Post Script)
(aka Post Script)
Post Script as in everyday letter writing. I would have thought Post Script to be some old word processor or Font Set. Is it now a Photo application? They are running out of names and short abbreviations. And the word deteriorated?
May 17, 2021 10:58:29 #
Longshadow wrote:
"Deteriorated"?? what do you mean?
Certainly not by sending it.
Sharp on their end but not on yours???
Very confused.
Certainly not by sending it.
Sharp on their end but not on yours???
Very confused.
You figured it out finally? Thanks for not explaining it (Deteriorated). PS, Ps, ps, P.S. whatever. As you know on the UHH correct spelling and grammar are no ons and we are to be tolerant.
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