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  1. Galleries
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  3. Astrophotography
  4. » Mars 07-08/08/2018

 
Mars 07-08/08/2018...

Astrofotografia

View gallery (26 photos)

Mars 07-08/08/2018 sent on August 12, 2018 (22:27) by Michael Barbieri. 11 comments, 923 views.






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avatarsupporter
sent on August 12, 2018 (23:42) | This comment has been automatically translated (show/hide original)

Personally I prefer the one above: it looks more natural. The second one seems to have some halo due to sharpening on medium frequencies.
In any case, great images full of details.
to the left you can sense the circular outline of the large crater Schiapparelli. A good satisfaction!

avatarsupporter
sent on August 13, 2018 (11:20) | This comment has been translated

Chapeau!

avatarjunior
sent on August 13, 2018 (20:49) | This comment has been automatically translated (show/hide original)

Thank you! Motofoto I don't know what marks you mean:) Maybe I could make it slightly brighter. :) Could you be more specific?

avatarsupporter
sent on August 13, 2018 (21:49) | This comment has been automatically translated (show/hide original)

[IMG]https://s15.postimg.cc/6o2r3s82z/Marte.jpg [/IMG]
I try to explain with this image:
1) The first on the left is your image second Image
2) The one in the middle has indicated a couple of lines that seem due to a very contrast mask Intense, more than a real feature on the planet's surface. The form, in fact, resumes the area contraright. The round one seems a posterization or an accentuation by contrast mask of the edge of the planet
3) The third is a speditive test of increase of sharpness, but the formation of those halos.
I do not know if it is clearer what I wanted to show you, especially having the first image that instead is very beautiful from a tonal point of view and without accentuations of "digital" sharpness. For that I have defined it natural (and very beautiful).

avatarjunior
sent on August 14, 2018 (0:27)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

Click here to translate the comment in English [en]


Ciao. Chiarissimo. Ti ringrazio per aver espresso la tua opinione che per me è sicuramente importante. Devo dire che però io non sono d'accordo. Prima di tutto perchè solitamente sto attento a fermarmi sempre prima del rumore in ogni mia elaborazione quindi non vedo perchè debba venire fuori qualche artefatto. In secondo luogo nella immagine di destra che hai provato ad elaborare io vedo esattamente quello che tu mi hai segnalato in quella a sinistra solamente meno inciso visto che il seeing della serata di destra era peggiore rispetto alla ripresa di sinistra. Inoltre quel dettaglio è presenta anche in altre riprese di altri autori che riporto qui sotto.





Inoltre il doppio bordo che ha segnalato (quello lungo è curvo) è presente anchesso nelle altre immagini ed è dovuto sicuramente alla bassezza del pianeta che è di soli 18°.

In ogni caso mia piace l'elaborazione che hai fatto in particolare sui chiaro scuri. Però secondo me hai utilizzato delle maschere troppo grosse "impastando" po' il tutto.

Ci tengo a sottolinere che la mia immagine è un IRRGB ed in molte imamgini RGB o con una luminanza meno incisiva sul RGB il bordo a S che hai segnalato è poco se non del tutto invisibile.



avatarjunior
sent on August 14, 2018 (0:51) | This comment has been automatically translated (show/hide original)

Another thing that disproves the fact that they are artifacts is the fact that the structures that you have highlighted are present in the filming of two different evenings elaborated in different ways and this point by two different authors. What I change is the seeing and the subscriptions of frames added up.

avatarsupporter
sent on August 14, 2018 (1:03)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

Click here to translate the comment in English [en]


Indubbiamente c'è qualcosa che genera quella sagoma a sinistra del Syrtis Major.
Io ho preso a riferimento le mappe del Viking che sono anche usate dalla simulazione di winjupos e anche quelle di Hubble nella grande opposizione del 2003. Ci sono formazioni chiare che potrebbero generare la sagoma, anche se non mi sembra che si estendano fino al Meridiani Sinus come nella foto o almeno non in modo così regolare e continuo. Però Marte non sempre si mostra esattamente come nelle mappe e quindi, visto che siamo a molti anni di distanza, ci può stare che ora rendano fotograficamente in modo diverso dal 2003.
Un po' mi condiziona la prima foto che trovo veramente bella: come vista all'oculare di un grande rifrattore in una notte di cielo perfetto. Sono cresciuto con l'osservazione visuale e la fotografia analogica, dove non è che si potesse spremere più di tanto. Quando vedo delle granularità scure e regolari e forme parallele alle zone contrastate mi viene d'istinto da pensare ad un effetto del digitale. Per questo "impastato" ai miei occhi equivale a "veritiero", ma è solo un questione percettiva. ;-)
In fondo, con le due immagini, hai accontentato tutti Sorriso




avatarjunior
sent on August 14, 2018 (1:14) | This comment has been automatically translated (show/hide original)

In my opinion, the structures that you mean could emit particularly in the IR for this are very visible. If I had done an RGB my picture surely you would have been more familiar:)
I think my and regular because between seeing, height of the planet and Apertira of the telescope I could not solve that structure well. Maybe in other conditions...;)
"When I see some dark and regular granularity and forms parallel to the areas contrasty I am instinctively thinking of a digital effect."
me, too... but I would never publish it if there were artifacts.

avatarsupporter
sent on August 14, 2018 (1:42) | This comment has been automatically translated (show/hide original)

could emit particularly in the IR for this are very visible

This is an interesting hypothesis.
I would have never published if there were artifacts

you're right. I did not mean artifacts as fictitious elements, but more evidence of some forms than could be expected, especially in relation to the first image.
Given the quality of the results with Mars, Jupiter and other astronomical subjects, I had no doubt about your care: You have a beautiful gallery.

avatarjunior
sent on August 14, 2018 (10:41) | This comment has been automatically translated (show/hide original)

Thank you. Pity that on Juza nn you can upload photos with less than 1000 pixels per side... otherwise I would have photos ?

avatarsenior
sent on September 04, 2018 (11:46) | This comment has been automatically translated (show/hide original)

As always, hat lifted Michael!!!!!! :-o Beautiful both versions!


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