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  4. » Orion v2.0

 
Orion v2.0 ...

Astrofotografia

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Orion v2.0 sent on March 02, 2020 (17:24) by Inverno_Muto. 35 comments, 305 views. [retina]

, Posa B f/8.0, ISO 1600, tripod.

Sempre Orione, questa volta i scatti sono 10 ma sono riuscito a spingermi fino a 300 sec per ogni singola foto.



View High Resolution 11.5 MP  



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avatarjunior
sent on March 02, 2020 (17:45) | This comment has been automatically translated (show/hide original)

Great, you also see a hint of flame! (NGC 2024)

avatarjunior
sent on March 03, 2020 (14:53) | This comment has been automatically translated (show/hide original)

Great sharpness! Congratulations!
I can ask why f/8? With 50' exposure you could have a lot more signal and no doubt see the horse's head as well.

avatarjunior
sent on March 03, 2020 (20:55) | This comment has been automatically translated (show/hide original)

Because in my opinion, even if the depth makes no sense given the distances it increases the sharpness and creates those beautiful stars with the rays around :-D
As exposure is a stacking of photos ranging from 30 seconds to 300.
Thank you!

avatarjunior
sent on March 03, 2020 (22:01) | This comment has been automatically translated (show/hide original)

...... but why staking it?? Yes, make the sum of so many equal shots to have at least a hundred minutes in the exposures......

avatarjunior
sent on March 04, 2020 (0:06) | This comment has been automatically translated (show/hide original)

Yes and it's not called stacking? merge all the photos. sequator use

avatarjunior
sent on March 04, 2020 (7:24) | This comment has been automatically translated (show/hide original)

I know staking with different depths of field. With exhibitions I don't know what it's called but mostly I don't know what it's for.
I'll do the sum of all the same photos - the dark frames - the flats
the pixinsight use

avatarjunior
sent on March 04, 2020 (8:37) | This comment has been automatically translated (show/hide original)

You do the same thing and it's always called stacking ;-)
Stacking is merging photos or sum as you say, then it depends on whether you do it for macro or for astrophotography.
For macros I use the sled and stack it with different depths. Type this [URL?https://www.juzaphoto.com/gallery.php?l-en&2595013] click
Or there is also stacking with different exposures or HDR as others call it. Here's an example of the example (URL-https://www.juzaphoto.com/gallery.php?l-en-3409081] click

avatarjunior
sent on March 04, 2020 (9:05) | This comment has been automatically translated (show/hide original)

Ahhh ok .... Hdr. Then I know him. But for astrophotography, the hdr is only done if you have a strong decompensation of brightness on very pushed details. And anyway they are HDR of sums.
For a wide field like yours is not very profitable. Next time try the sum of many identical photos with their corrective shots.
If you don't have Pixinsight you can try Deep Sky steaker

avatarjunior
sent on March 04, 2020 (9:37) | This comment has been automatically translated (show/hide original)

No wait for HDR was an example :-D stacking.
For astrophotography I take all the same photos or varying times to the maximum.
Many take 10 photos at 180 seconds 10 to 120 and so on although I have not yet figured out if there are advantages.

avatarjunior
sent on March 04, 2020 (9:45) | This comment has been automatically translated (show/hide original)

I'm not there. To improve the relationship between signal and noise the only system is to make all the photos exactly the same. Same times, ISO
Of course the longer the time and the more noise you'll have but you'll also have a greater chance of capturing photons. That's why we make the sum of exactly identical photos. Noise is random, the signal is not. So dedicated programs recognize the signal and overlay it

avatarjunior
sent on March 04, 2020 (10:29) | This comment has been automatically translated (show/hide original)

So, that I know the noise only increases with the increase of iso and not of the times, but in any case there are various philosophies of thought.
There are those who say that by varying the times and iso noise is "found" better during the union phase and then removed more effectively and there are those who say that instead they should all be made equal.
I'm a beginner in this field so I try to try them all a little bit.

avatarjunior
sent on March 04, 2020 (11:03) | This comment has been automatically translated (show/hide original)

I started at HDr myself, so I say this for sure. There is also a method that also applies to common photos that is based on the same principle with great effectiveness.

avatarjunior
sent on March 04, 2020 (11:43) | This comment has been automatically translated (show/hide original)


avatarjunior
sent on March 04, 2020 (11:49) | This comment has been automatically translated (show/hide original)

Yes of course...... by identical I didn't mean a paste copy of the same photo. I wasn't clear. Thank you for your intervention!

avatarjunior
sent on March 04, 2020 (11:51) | This comment has been automatically translated (show/hide original)

:-D Imagine.. I pointed it out because I asked myself several times if it was not possible to "cheat" by feeding DSS multiple copies of the same photo 8-)

avatarjunior
sent on March 04, 2020 (11:57) | This comment has been automatically translated (show/hide original)

On the speech that by identical meant as settings and not the copy paste I had taken it for granted :-D
I didn't understand the phrase " they must all have the same exposure. "
What do you mean by "exposure"?
Then as far as the spike effect is concerned.
I do 4 to F closed and then I'm going to integrate them with the rest of the open F shots?

avatarjunior
sent on March 04, 2020 (11:58) | This comment has been automatically translated (show/hide original)

Noooooo impossible Francis.... But it would be a nice comfort :-D

avatarjunior
sent on March 04, 2020 (12:01) | This comment has been automatically translated (show/hide original)

I mean ISO themselves, same diaphragm and same time.
Spikes are added in posts is just a pointless venom. By nature I think you can only have using a Newtonian telescope

avatarjunior
sent on March 04, 2020 (12:01) | This comment has been automatically translated (show/hide original)

What do you mean by "exposure"?

same diaphragm/time pair
I do 4 to closed F and then I'm going to integrate them with the rest of the open F shots?[ /QUOTE]
perfect. you probably want to overlap them in PS, but also try directly in DSS, maybe a result that you still like.

avatarjunior
sent on March 04, 2020 (12:03) | This comment has been automatically translated (show/hide original)

By nature I think you can only have it using a Newtonian telescope

exact


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