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  1. Galleries
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  4. » Mon to 3 colors ...

 
Mon to 3 colors ......

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avatarsenior
sent on September 19, 2012 (12:31) | This comment has been automatically translated (show/hide original)

Very nice ... you can enter shooting data?

avatarjunior
sent on September 19, 2012 (12:53) | This comment has been automatically translated (show/hide original)

Super detail! Wow!
did you use a webcam?

avatarsenior
sent on September 19, 2012 (13:18) | This comment has been automatically translated (show/hide original)

I entered the data release, the f / 11 is due to the fact that the aperture is f/5.6 which seems to offer greater clarity with the 70-200 and 7D, except that with the duplicator to ratios of f/11.
It's actually the same image for the photo "Moon Color 2" obtained by averaging 29 shots, 18 of which with the camera ruotta of 45 °, because I read somewhere that is a good way to rescale the iimagine getting more detail, the fact is that I preferred then reset the image size to which he had collected the sensor (the image was scaled too soft).
All the images I still scaled to 400% to better align them.

avatarsenior
sent on September 21, 2012 (22:01) | This comment has been automatically translated (show/hide original)

On the issue of color out of the atmosphere has already been said in another post: I personally see the Moon from the Earth, I want the colors as seen from Earth. But experience is not bad, then you are right to do so. We say that is definitely the question ... points of view! ;-)

What I'm not convinced of your Moon are not, however, the colors, the detail: it seems that the image is passed with the artistic filters in PS, you see a little '"mixed". I'd like to see a single shot is not reduced, as it was to understand the details of the raw image.

a greeting

Clear


avatarsenior
sent on September 22, 2012 (2:14) | This comment has been automatically translated (show/hide original)

Hello Chiara, the idea came from an image of the moon with colors sovrasaturati I saw on the wikipedia page under the name of the moon.
From there you can see that the first result in loading "Luna Color 2" where I had balanced the RGB channels, then this after you have this balance of an arbitrary point close to saturation of the photosite and oversaturated colors.
The talk about the colors we badly dealt with a different image, I understand that for you the moon is yellow because we see yellow when you are at 45 degrees above the horizon, then red when it rises and is almost neutral if we look at it when he is at the zenith?
I would understand if you do not believe that there is something arbitrary in all this and that we need to define a method to standardize the color of one orbject extraterrestrial.
If we do not correct the defect of extinction, we may be able to evaluate the temperature at which a star burns? Looking at the color of the sun without considering that we are seeing more red than it would not be inclined to give an erroneous assessment of the temperature?
And if one wants to take pictures of "art" is free to do so, my want to be a starting point for you to think about this argument is not just ...
More than with practical examples do not know how to explain it.

Tomorrow shortly after a first pulled out to compare the detail shots mediated by the single click you know how it is dominated by the deformations given by the atmospheric turbulence.

avatarsenior
sent on September 22, 2012 (2:42) | This comment has been automatically translated (show/hide original)

this is the result of the average of the shots with camera horizontal mediated in turn with those with the camera to 45 ° (technique that does not riuserei in the future).
I reported the original file to blow up after the individual shots I had quadrupled to align them more accurately.

avatarsenior
sent on September 22, 2012 (2:48) | This comment has been automatically translated (show/hide original)

and the link? :-D sorry ...



avatarsenior
sent on September 22, 2012 (10:04) | This comment has been automatically translated (show/hide original)

Personally, I like the colors a lot more of the latter Moon, are the ones that my eyes are used to seeing.

I understand that for you the moon is yellow because we see yellow when you are at 45 degrees above the horizon, then red when it rises and is almost neutral if we look at it when he is at the zenith?


yes, it is! I do not care to make a scientific picture of the moon.

I would understand if you do not believe that there is something arbitrary in all this and that we need to define a method to standardize the colors of an extraterrestrial object.


Sure, it's arbitrary. But I repeat, the images that we do (and I mean soprattutto to mine, but also to most other amateurs) are not scientific, not rappresenterenno never the true colors of objects. But even photos of landscapes, animals, etc., they are! The photography in general, is not reality, but an interpretation, like any art form.
I limit myself to remedy the lack of dominant red my camera changed introduced by filters, devoted to astronomy and nothing else.

There are also cases in which an image can be "scientific", for example, I had the opportunity to shoot the asteroid occultation: it is a smear on the star which must be concealed, timing carefully start and end, if the star is occulted the strip at a certain point will be interrupted, allowing to calculate the times of beginning and end of the event and its duration. If pi & ugravand, people in different parts of the band doing this work occultation data can be used to more accurately determine the orbit of the asteroid and its shape. This is a case where amateur photography became scientific. Or there are the transits of extrasolar planets: now I will not dwell, if you are interested in on the web has it all and more, in this case to take pictures of a certain star and measure the loss of light due to the transit stellar disk of the planet.

Otherwise, as I wrote in the post, there are narrow-band filters and spectroscopy and using the exit by the arbitrary, because, especially working in B / W, the image you see is the "footprint" of 'object in that particular wavelength. To give you an example: the pictures of the Sun in H-alpha. Are red onlybecause if the camera uses the color filter causes a red, but red is that you keep, whether the convert to B / W (or any other color, ironically) that will always be an image of the Sun in h- alpha and only in h-alpha! Spectroscopy: the emission lines and assorbiomento the stars have precise locations, indipendetemente from the color sensor that you used to assign that portion of the spectrum. For example, the lines of magnesium in the solar atmosphere falls in a region, that if you take photos with the camera spectrum is green. But if you convert the image in b / w the lines stay where they are, the wavelengths they represent are always the same. We say that "fall into the green" because our eye sees green light with the wavelength. Anything to make you understand that I think in the end colors are always arbitrary, depending on the nostro eye in the first place, from the sensor you are using, etc.. so I think it's fair to experiment as you do, but the degree of arbitrariness still remains high unless of course, not to work with filters or special sensors.

a greeting!

Clear

avatarsenior
sent on September 22, 2012 (12:51) | This comment has been automatically translated (show/hide original)


user789
avatar
sent on September 22, 2012 (15:20) | This comment has been automatically translated (show/hide original)

Incridible vision! wow!
Having never done shots like that ... I was wondering what you mean by "mediate 29 shots including 18"!
Did you mediated in PS? : Fconfuso:
Did you use a tracker as you do for the stars? :-)


Anyway congratulations indeed!
hello
Paul


avatarsenior
sent on September 22, 2012 (16:50) | This comment has been automatically translated (show/hide original)

With extended photoshop can do is average median (convert to smart object, etc.), but the media can also be done simply by overlapping the various shots after aligning them and set the opacity of the various levels so that they contribute to the final result in the right percentage: ie, background level of 100%, according to 50% (to make one half), the third to 33% (contribute one third each) etc. ...
reached a five or six images rates will be too low, so it is best to make a new battery and put it at 50% with the one below, may make a third to 33% and so on.
A total of 29 shots of the moon to 1/60mo of a second, with the focus not veririfica no phenomenon of "blur".
In turn there are different formulas for calculating the maximum exposure time for ogastronomical jets, the result depends on the focal length used and the blow up of photosites on the sensor.
For the 7D should be: seconds max = 150/focale in mm
If you do not mediassero several shots you would have a less clean signal (s / n rate) and the details of the moon would be distorted by atmospheric turbulence (you would see crateli oval, etc.).
Having neither telescope nor pursuers the moon is the only person I can afford to get good results, although there would be the sun, but I have not a sunscreen!

avatarsenior
sent on September 24, 2012 (14:02) | This comment has been automatically translated (show/hide original)

I am a barbarian and your moon color I like it! :-D You are too far guys, congratulations for the effort that you put into it! I I'm happy to see your beautiful photos with a bit of envy! :-) Best wishes, Joe

avatarsenior
sent on September 24, 2012 (14:44) | This comment has been automatically translated (show/hide original)

Hahaha hello Beppe!

avatarsupporter
sent on October 04, 2012 (22:44)

Just Waow !

avatarsenior
sent on October 05, 2012 (13:23) | This comment has been automatically translated (show/hide original)

Thank you Saroukai!

avatarsenior
sent on October 05, 2012 (17:50) | This comment has been automatically translated (show/hide original)

Hello, excuse me a question: you used the focal Doubler Sigma, how do you find us?

I was planning to take the Canon 2x mk3 but cost the earth, nothing to say about the goodness that is in excellent reviews but if I can save money and have the same quality is better ;-)

PS too good your Moon, the more I see the more I like:-D

avatarsenior
sent on October 05, 2012 (18:06) | This comment has been automatically translated (show/hide original)

Find a review on the Sigma 2x here on Juza, does his duty, I can not judge the vignetting and the decline in yield at the corners because of aps-c take only the center of the circle.
Duplicating duplicate the faults, especially chromatic aberration, but this is the correct almost completely.
The result then depends on what goal you use the duplicator, I with the 70-200 I am fine there, with a few euro I have a 400mm noteworthy (see a review of the Tamron 70-200 + 2x here on Juza! ).
Used find it on the 150 euro, I think it's worth it all.
I'm glad your appreciation to "my moon"! : D

avatarsenior
sent on October 06, 2012 (18:13) | This comment has been automatically translated (show/hide original)

Wolf Thanks for the tip, I asked because I think I also take a 70-200mm f/2.8 and a 2x I was wondering how could worsen the primary lens. The vignetting I had not thought, in fact I think I'm still on a APSC because I want to change the body to move to the 650D, the same that my brother took the other day with mounted on the 18/135 STM. Now he is looking for a EF 50 f/1.4 USM which could serve well to me but we have the advantage of being at home and swap lenses. Just find the conditions tried again to take some pictures of the Milky Way with its 650D, I just want to see how much difference there is noise compared to my 450D, if only to try using ISO 3200 but with a time of 20 "or max 30 ".... while I have pulled up to ISO 1600 to 65 "but the noise is unacceptable not to mention that you begin to see the streaks oflle stars, which I should not get a motorized equatorial mount AR apsettando I'm anxiously. Just find who lends me a 400 or a 200 with 2x try to do the job to the Moon as you did:-D The great thing about this forum is that you can develop your ideas and share :-) Many thanks Wolf, see you soon. Beppe

avatarsenior
sent on October 06, 2012 (18:47) | This comment has been automatically translated (show/hide original)

Beppe Ok, keep me posted!
Also I come back this evening to shoot the moon, should be very close to Jupiter, I'm going to do some HDR to shoot in the satellites (to be mounted not delinearizzate, but in the meantime I make purchases, then you see).
I have not yet done so to buy a motorized mount because they are totally undecided whether to take a Dobsonian for viewing (like the Lightbridge 10 ") or a solution for the recovery.
But for now lack both the time and the money, then the problem is returned: D

avatarjunior
sent on January 30, 2013 (9:41) | This comment has been automatically translated (show/hide original)

Paul, I replied in the CC group of FB here tell you more than pay an eye to the saturation of the edge where the presence of chromatic aberration can do tricks.
hello


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