Collins Complete Photography Course. John Garrett
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СКАЧАТЬ the large size and fine setting takes up more space on the memory card, it’s best to select it because you may want to do a bigger print in the future. Even if you think you are only aiming for postcard-size prints, there may be some shots you are so pleased with that you want to print them poster-size, and if you have used a smaller file size you have ruled out that option.

      Fine (less compressed) JPEG files produce high-quality images and are used by many professional photographers.

      

      RAW format

      If you save your file in RAW format, you are storing all the image information that is received by the camera. It’s the digital equivalent of the analogue camera’s negative. Every detail is in the file for the photographer to download onto the computer and make adjustments to later; just like the film photographer will take his or her negative into the darkroom and use the information on it to make a print, so the digital photographer will open up a RAW file in Photoshop and process the image to make a final interpretation. This is then saved as a separate file, and the RAW file is kept untouched ready for future use.

      The disadvantages of RAW files are that because they are not compressed by the camera they take up more space on the memory card, and the camera also has to pause more frequently to write them to the card. While professional cameras can do this fast enough not to cause a problem, keeping up with the action at a sports event, for example, isn’t practicable with many consumer-level cameras.

      The CD provided with your camera should include software to enable you to process the RAW files. If not, you may have to buy a program or download a free one.

      Some cameras have the facility to shoot RAW and JPEG at the same time. Many professionals use the JPEGs as a digital equivalent of a darkroom contact sheet from which to choose the best pictures then get to work on the RAW images.

      

      TIFF format

      In terms of quality, TIFF files lie between JPEG and RAW files. They are compressed, but not as much as JPEGs; they lose no detail, but take up much more space than a JPEG, though less than a RAW file.

       You have a choice of file formats. Shooting high image quality and large file size will allow you to do large prints if you ever need them. Use RAW if you plan to do extensive retouching on your pictures in Photoshop.

      So, your choice of file type depends on how many pictures you want to get on the card and on the quality you are after. However, not all cameras offer TIFF as an option for storage.

      

      Memory cards

      In the digital camera, the memory card replaces the function of film in terms of recording the images. The cards are available in different memory capacities; which you decide to buy will depend on the number of images you want them to hold, and their size. They also have different transfer speeds – the faster they record, the faster you can shoot.

      Make sure you turn your camera off before you insert or remove a card. Before you use a card for the first time, you must format it in the camera. Reformatting a card which contains images will permanently erase them, so make sure you have copied them first.

      It’s a good idea to have several smaller capacity cards instead of one large one, especially when you go on holidays. That eliminates the possibility of losing all your pictures if you damage or lose a card.

      

      Downloading

      There are different ways of downloading the pictures from your memory card. You can download directly from your camera to your computer using the USB cable supplied, but it’s quicker to download via a separate card reader. As a precaution, many photographers download their images onto a portable storage device or laptop computer while on location. Some printers have card readers built in and you can print directly from your card without needing a computer.

      Sharpening

      • This function gives your pictures an appearance of greater sharpness by emphasizing the borders between light and dark areas. Whether and how much you sharpen in the camera is a matter of personal taste and also the subject matter. Sharpening is more suited to architecture than baby pictures, for example, though you can choose different degrees of sharpness. If you plan to work on the images in Photoshop later, it’s best not to sharpen in the camera but to leave it as the last step after you have retouched and resized the image.

       Using a card reader is a quick way of transferring your pictures from the memory card to your computer.

       Downloading the images from your card into a portable storage device such as this makes a secure back-up copy and is a way of managing your pictures on location.

      Film effects

      • If you want a digital image to look as if it has been shot on a particular film you can use software that will mimic the appearance of any film available now and even some obsolescent ones. Films such as Fuji Velvia, Kodak TriX, Ilford Delta and many more can be reproduced in Photoshop using software programs.

      Film quality

      It’s a mistake to write off film as a dying technology – in fact there is probably a greater variety of films available than ever before. While digital technology has been motoring on, film emulsions have been improving too. New films have been launched and some old discontinued films have been revived; at the same time the current favourites are still being improved.

      The processing chemistry that goes with black and white film has been improved also and there are several small manufacturers making traditional formulae that have not been seen for years. This revival is directed toward the art photography movement.

      Some photographers working in both colour and black and white prefer to shoot film and then go digital by scanning the negative into the computer and fine-tuning the image there, combining traditional and modern technology.

      

      Black and white film

      The actual speed of black and white films is dependent on the amount of development they receive – for example, a film that has a manufacturer’s rating of 400 ISO can have a working speed of 1600 ISO if the development time is increased sufficiently. Longer development times increase grain size and contrast. There are films available designed specifically for uprating, known as push films.

      Black and white films are available in the following categories:

      

      Slow-speed films: 20 to 50 ISO This group of slow films produces the ultimate in photographic technical excellence, giving very fine grain and high resolution (sharpness) and contrast. Use them for any subject that would be especially enhanced by those qualities, such as architecture and still life. Ilford, СКАЧАТЬ