Deep Sky Photography
In the picture of heaven profunfo, photographs are objects beyond our solar system, nebulae, star clusters, supernova remnants, etc .- and even outside the Milky Way, other galaxies.
The two essential features, from a photographic point of view, are its large angular size in some cases, more than 200 times the apparent size of a planet like Jupiter and small, sometimes very low-luminosity of the object, due to enormous distances that are now the scattering of light on a vast area of space.
In fact, the Deep Sky Photography we have a wide variety of cosmic objects, some with very large apparent sizes (in the case of some emission nebulae), those with extremely low luminosity (some dark nebulae), other with very small angular sizes (most planetary nebulae and distant galaxies, ie, almost all but half a dozen who are closest to ours).
Planetary Photography
The Photography Planetary , photographing objects found in our solar system and are characterized by an angular size (apparent size) very small: the best, planets like Jupiter, Mars or Venus, to the naked eye look like very bright stars. The second important feature is that they are very bright objects.
(A) Due to the small apparent size of the planets, telescopes are needed very long focal lengths, the order of several thousands of millimeters. Aperture (the diameter of the objective, ultimately, its luminosity) in this case is not so important.
(B) The second implication is that when bright objects are used relatively short exposures, the order of tenths of a second to few seconds.
(C) Another important aspect is that, due to the high magnification used, the degree of stability of the atmosphere (which is called seeing in English) is crucial to get sharp pictures. Turbulent atmosphere and result in high magnification blur and even distorted. Light pollution however, is immaterial.
(E) The small sensor cameras with small pixels are best, as to cover the angular field is very small, except in the case of the Moon. As an example, Jupiter has an angular size of less than one minute of arc while the moon has an angular size of more than 30 minutes, ie, more than thirty times the apparent size of Jupiter.
What is astrophotography?
Astronomical Photography (also known as Astro ) is usually divided into two camps: The Photography Planetary and Deep Sky Photography . In the first case, it is basically photograph the planets of our solar system, but also includes the satellites, including our own, and comets. In the second case, it is to photograph nebulae, galaxies and supernova remnants. The equipment needed for each case and the capture and processing techniques are quite different.
However, it should be noted that from our latitudes (Spain) there are few objects that are larger than 1 ° (a dozen or less). Some of the most photographed are:
• NGC 7000 (North America Nebula): 120 ‘x 120′
• M 42 (Orion Nebula): 65 ‘x 65′
• M 31 (The Great Andromeda Galaxy): 180 ‘x 60′
• NGC 1499 (California Nebula): 160 ‘x 160′
• M 33 (the Triangulum Galaxy): 68 ‘x 41′
• M 45 (Pleiades): 110 ‘
• NGC 6992 (Veil Nebula): 60 ‘x 60′
• NGC 6990 (Nebula Witch Head): 70 ‘x 70′
• NGC 2237 (The Rosetta): 80 ‘x 80′
• IC 434 (Horse Head): 60 ‘x 60′
In future articles we will comment on the equipment available for deep sky photography and the techniques and programs available for processing these types of photographs. I hope you have served as the starting point of an exciting-and difficult-fans.
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Black and White Conversion
A digital age gives us, among others, the ability to convert a color picture to black and white. Before he took or color, or black and white. A bit of theory before going into details: The sensor captures light through micro-filters placed over each RGB photosite, which normally follow a pattern called BAYER (which has twice the green photosites red and blue, because the increased sensitivity of human eye to green wave LENGTH). Then interpolates (creates) the missing and generates an image in color.
Black and White Conversion
In some pictures , new textures, shapes and contrasts emerge when converted to black and white. But it’s not as simple as desaturate the photo. These vary the brightness and contrast of each RGB channel until you find the combination that we like. Is a very useful tool that brings Photoshop CS4, which is the option to create an adjustment layer Black and White already has some presets useful. In this case, besides the RGB channels includes the ability to also modify the CMY channels. For example the picture I used the preset High Contrast Blue Filter .
The result adds a new dimension to heaven, earth and solar panels in the picture. The contrast ratio is radically changed by providing a different view, visually attractive. It is worth experimenting with different types of pictures to get familiar with what kind of settings work with what kind of colors.
Image Compositions
The composition of an image is the process by which they organize their various visual elements to cause a certain effect and a sense of wholeness.
When composing a picture is good to keep in mind the following principles:
Clarity and simplicity: In a composition of visual elements should not interfere, is not correct in terms of composition of ambiguity, it is important to the simplicity of this. The clarity and simplicity is not opposed to the complexity of an image.
Harmony: Elements of the composition bear a resemblance to each other by color, shape, lines, lights …
Contrast is based on the differentiation of its elements, as a way to strengthen the significance of each one of them.
Balance: This is that each element of the image is “in place”, that there is no empty meaningless random one hand and charges for the other. The balance can be achieved by static composition and dynamic composition.
The static composition is obtained through three techniques, symmetry, repetition of elements and the organization of space into regular units.
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Photography Info
Photography is a language, a skill and an art. It’s a way to capture and graphically display visual reality. Each picture is a fragment, a cut actually played with our eyes through the camera.
It’s amazing how something ordinary, everyday thing can become fascinating when you look at it from a personal point of view.
Photography allows you to uncover that which was always there, explore, and unique moments frozen expressions and details that surround us are full of beauty, full of mystery, full of meaning. It’s simple aesthetic appreciation of a stage and the light of an unrepeatable moment.
I usually try to isolate a detail that stands out for its color, the contrast between highlights and shadows or the whim of the forms that are obtained when we fix our gaze in an anonymous corner. So in my photos for places I recognized. For me are the importance of their own beauty, the beauty that is there at the time and call me for the portrait. Nor thus have a symbolic meaning. They claim themselves and to help you personally I just like to add a title that does not explain what it is, but invited to imagine, to suggest situations or confused too, why not, the viewer is confronted with them by first time. “
Photography as an alternative art form
From the 1860s to the 1890s, photography was conceived as an alternative to drawing and painting. The first standards of criticism applied to it were therefore those that were used to judge art, and accepted the idea that the camera could be used by artists, because it could capture the details more quickly and fidelity eye and hand.
In other words, photography was seen as an aid to the arts, as did Hill and Adamson. In fact, around 1870 it was accepted practice to pose the subjects in the study, and then tweak and refine the photos to make them appear paintings.
During the second half of the nineteenth century Swedish photographer Oscar Gustave Rejlander and Henry Peach Robinson British discovered the method of creating a copy from several different negatives. Robinson, who began his career as an artist, he based his initial sketches descriptive images in pencil. His influence as an art photographer was great. For example, some of the work of his compatriot Julia Margaret Cameron, plays were composed like paintings of the era.
Art photography
The pioneering work of Daguerre and Talbot led to two different types of photography. The daguerreotype positive, appreciated for its clarity and detail, was used especially for family portraits as a substitute for more expensive painted portrait.
Later, the daguerreotype was supplanted in popularity by the carte de visite, which used glass plates instead of iron sheets. On the other hand, the procedure of Talbot calotype was less accurate in the details, but had the advantage of producing a negative that could get the number of copies desired.
Although the calotype was initially associated with landscape photography, from 1843 to 1848 is technique was used by the Scottish painter David Octavius Hill and Robert Adamson contributor to photographic portraits.
Commercial and advertising photography
The photograph has been used to inspire and influence political or social views. Also, since the 1920′s has made use of it to promote and direct the consumerism, and as a component of advertising.
Commercial photographers make pictures that are used in advertising or as illustrations in books, magazines and other publications. To be attractive your images using a wide range of sophisticated techniques. The impact of this kind of imagery has been a strong cultural influence.
Commercial and advertising photography has also been a big boost in the graphics industry along with advances in the techniques of photographic reproduction quality. Excelled in this field Irving Penn and Cecil Beaton, high society photographer, Richard Avedon, who achieved fame as a fashion photographer, Helmut Newton and, controversial fashion photographer and portraitist whose works often feature a great erotic content.
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Get Yourself a Brand New Camera and Memorize Every Place You See
Next month is the time you and your family have been waiting for. It is the vacation. Holiday always brings new passion and spirit to you. During this holiday, you are going to have an abroad vacation with your family. You will go to Europe and visit some nice places. It will be something to remember for sure. Because it is going to be the first abroad vacation, you want everything to be perfect. This is why you prepare the whole thing you may need from now.
Your bag and your clothes are ready. You make some list of the food you will bring later. But there is only one problem left. You need to have a new camera because your old camera is broken. The picture that it takes is not in good quality and it creates more noise and blurry images than the best quality images. Your vacation will be ruined with this old camera of yours. You would not have a good memory to remember.
This is why when you want to buy a good camera on your own, it would be nice if you check the collection first and know the specification. With a great specification and brand, it can be guaranteed that you will have the best camera to shoot the best angle of your trip later.