Introduction To The Formats For Saving Photographs

Introduction To The Formats For Saving Photographs

When a picture is taken, the image is stored on the memory card. The rescue of the photographs on the memory card is through the process of encoding, or the camera follows a particular pattern (a code, of course) for a particular save format. This scheme is primarily act to reduce the final size of the image, or to collapse it. In most compact cameras,

pictures are encoded in JPEG format as default. Many cameras, however (and particularly SLRs), can be set to encrypt the photos in different ways, each with its pros and cons.

Generally, the compact saved in Jpeg while, going up in price and quality, plus TIFF and RAW (RAW vs. JPEG article I introduced two of the formats listed).
Pros and Cons of the formats for saving photographs

JPEG is the most famous and widely used format for saving images. Used by all digital cameras, JPEG is a lossy format, which means sacrificing the image quality to ensure a small file size.

The advantages of JPEG:

Small file size: you can fit more images on a memory card and transfer images to your computer faster.
Saving photos faster The gusts cameras are faster.
JPEG files can be viewed on any computer without third-party software.

The disadvantages of JPEG:

When capturing an image in JPEG format, the sound is softened and the image is generally sharp. The camera generally reduces the image depth from 12 to 8 bits which translates into a loss of detail and quality.


Recommended use for JPEG

JPEG is the best format to use photo in general, such as parties and social events where you need to take pictures quickly.
JPEG generally do not require any conversion pass to the computer, or the image is immediately usable anywhere.


RAW files are not compressed and are not processed. RAW files must first be processed using third-party software (usually provided by the manufacturer of the camera before they can be printed or changed. The most renowned software (such as Photoshop, Lightroom or Aperture) are equipped with a converter ( as Camera RAW) whose aim is to decode the RAW image, different from camera to camera (I refer you to Article linked above).

The benefits of using RAW

The main advantage is that the image processing is performed on the computer. This means that if you’re about to take a picture and you are not sure that white balance and exposure settings are optimal, you can (a few stops!) Develop the computer image correcting precisely the shooting parameters.

The Difraction In Photography

The Difraction In Photography

As can be seen, the Airy disk decreases with the increase of the opening. In particular, with f / 4, the size of the Airy disk is equal to 5.3 pM against a pixel size equal to 5.5 microns. Already from f / 5.6 the disc exceeds the size of the pixels becoming “appreciable” (7.5 mM vs 5.5 m). At the minimum aperture (f / 32) the size of the Airy disk are huge: 42.6 pM against the usual 5.5 mM of the pixel size. Consider also that in higher performance cameras, such as the D800, the pixel is smaller than (equal to 4.9 uM), for which the effect of diffraction begins to be important (although we speak of something almost invisible to the human eye) to values ??of f “technically” inferior to those relating to D5000 (obviously, in order to appreciate the defect with the naked eye, one must reach high values ??of f, from f / 16 onwards).

Thanks to the anti-aliasing filter (and to the Rayleigh criterion), an Airy disk may have a diameter of about 2-3 pixels before reaching the first diffraction limit resolution (assuming a perfect lens). However, precisely because the lenses are never perfect, the diffraction already has a visual impact before reaching this diameter. For example, the Canon EOS 20D begins to show diffraction to about f / 11, while the Canon PowerShot G6 begins to show its effects only at f / 5.6. On the other hand, the Canon G6 does not require small openings such as 20D to obtain the same depth of field (due to the much smaller size of the sensor).

Because the size of the Airy disk also depends on the wavelength of light, each of the three primary colors will reach its diffraction limit in different openings. The classic digital SLR cameras are capable of capturing the light with a wavelength between 450 and 680 nm which results in an Airy disk whose diameter is at most 80% of what is shown in the drawings above , calculated at 550nm.

Another complication is that the sensors that use a Bayer matrix (so most) devote most of the pixels of the green color compared to the blue and the red (about twice). For the wavelengths, its green is the color that is affected by the first diffraction (blue is the last), for which in the photographs, the limit of the diffraction resolution, first of all we will notice a loss of resolution and brightness in green Colour.

Trends Fall 2014 Shoes Cut Out

Trends Fall 2014 Shoes Cut Out

Trends shoes fall 2014, among the most popular models there are undoubtedly cut out the shoes, available in a wide range of models and variations. The finest seasonal proposals can be found in our gallery.

And even when temperatures are cool, according to the biggest names in fashion, the foot has every right to get some air, that’s why one of the hottest trends in fall 2014 is to cut out of shoes, shoes with very characteristic cuts that leave almost always in plain sight a few centimeters of skin

Usually are shoes with very detailed processes that are performed with the laser, with very original shapes and design that does not go unnoticed, footwear already highly popular among celebrities and fashionistas, who have not let certainly caught unprepared by what seems to be one of the most glamorous trends of the season.

Among the most popular models do not go unnoticed boots by Jeffrey Campbell, who between large metal buckles and plateau glimpse of a few centimeters of the skin this kind of shoes the we had also worn last winter, and it was just one the magnates of the low cost in proporceli in economic version, as they did this year Bata and H & M. Alexander Wang offers us his ankle narrow toe boot with uppers worked by laser, while Oscar de la Renta is proposing the same model as far more formal and sophisticated.

For the evening or in general to be combined with a dress, the Mary Jane are definitely the strong point of the collections of Valentino and Tamara Mellon, while Christian Louboutin and Nicholas Kirkwoord link on open-toe classic, but these cutouts made by laser we also find them on and laced brogues. This new trend of the season intrigues you Then try to take a look at our gallery, where we gathered some of the most beautiful models of the collections autumn winter collection 2014-2015.Una in practice with us in style at any time of the day.

The collection of Tod’s Fall Winter 2014-2015 bags, in short, spare us many innovations, but let’s start with some great classics, the ones who are undoubtedly the top models of the house, like the trunk D Cube and the Sella line, which are flanked by many new models weighed to adapt to the routine of the most demanding woman.