File Size, Compression & Memory Cards. Introduction to Digital. Photography by Frank Phillips. There is still a lot of confusion. With all the new. ![]() It is easier to approach something if you can take it in small. So in an effort to make digital easier to approach and understand. I've grouped together everything you need to know to get started in ten. Lesson 6: File Size, Compression. Memory Cards When you press the shutter on your digital. Your choice (or lack. So what is compression? Lesson 6: File Size, Compression & Memory Cards. When you press the shutter on your digital camera the image must be saved as a digital file. SDXC standard - over 32GB-2TB SDXC memory card using exFAT file system : SD Standard: SDHC Standard: SDXC Standard: Capacity: up to 2GB: more than 2GB up to 32GB. ![]() As its name implies the image data is squeezed. Compression, when used correctly, is an extremely beneficial tool. However, when used improperly or overzealously, compression can literally. Nikon D5500 SD Card Comparison. File size (average): RAW (14-bit NEF). memory card speed has a big impact on continuous shooting performance. Transferring a 4GB or larger file to a USB flash drive or memory card. Right-click on the flash drive or memory card, then select Format. 3. Getting yourself in a memory card muddle and not sure which card to buy? Let our guide to understanding memory cards. The differences between FAT16, FAT32 and exFAT file systems. If a digital device supports only the FAT16 file system you cannot use a memory card bigger. . Maximum supported Memory Card. Maximum supported Memory Card & File Sizes under. Windows CE can theoretically support any size SD card that the. It's best to think of compression like you do salt; a little can really. And like salt, once you've added. ![]()
Understanding File Types The most common digital image file types used today are JPEG, TIFF and. RAW. Every digital camera on the market today commonly stores images in. JPEG format by default. Some can also store images in TIFF format. RAW. format is only found on high end digital cameras and digital SLRs (for. I'll explain in a moment). Each format has it's advantages and. TIFF format produces large files. Most TIFF files are completely. The benefit of TIFF. Most cameras only save TIFF files at the. In other words if you. TIFF format, that file will be 2. JPEG (also abbreviated JPG) files are much smaller than TIFF. JPEG gives you millions of colors, and. That same 3. 0 megapixel camera might. JPEG files at the following common. Why would you. want to capture images at lower resolutions? One might be that you're. Web site where even 6. But in addition to resolution, JPEG mode also allows you to control the. In most cameras the. Choices vary from camera to camera but they'll usually be. To understand how compression works, you'll need to think back to the. An image is made up of many tiny squares. Each pixel has only one color assigned to it out of a. In the case of a TIFF file, the color. In the case of JPEG compression, an algorithm is used to reduce the. JPG doesn't remove pixels (which would reduce. What's useless information? Imagine a photo of a red car. A TIFF file. will record every pixel in the image of that red car. A JPEG file will. Not having to record every pixel means. How close the color can be and still be. RAW files are the largest of all. When you change the settings. ISO. setting you're telling the camera to change the image after it's captured. Photoshop right inside your camera. In. RAW mode the original unmodified image data is saved along with all the. When you read a RAW. Photoshop all those camera settings are applied to the image to. LCD screen. The power of RAW. A year later you can decide the image might have looked. The price you pay for this flexibility is that RAW files are really. TIFF files. That means you'll be able to get. To see the difference in file size between TIFF and various levels of. JPEG compression, I've compiled the following table from an uncompressed. TIFF file I shot with a 2. Nikon. The size of RAW files will. Compression. / Type. File. Size. Reduction. Cumulativefrom 1. JPG Uncompressed. TIFF5,6. 33. KBn/an/a JPEG. No Compression. 1,3. KB7. 7%n/a JPEG. 5% Compression. KB5. 6%5. 6% JPEG. Compression. 37. 2. KB3. 5%7. 2% JPEG. Compression. 23. 5. KB3. 7%8. 2% JPEG. Compression. 18. 0. KB2. 3%8. 6% JPEG. Compression. 14. 8. KB1. 8%8. 9% JPEG. Compression. 12. 8. KB1. 4%9. 0%As you can see, the more compression you apply, the smaller the file. The file. size reduction is the most dramatic between no compression and 1. Once increase compression to over. Just what happens to an image when we apply too much compression? The. resulting image tends to block up with digital artifacts that are called. This is especially evident in the comparison of the. Take a hard look at the edges and detail, and you'll see. I mean. You may also see visible bands of color in continuous tone. Those are the extremes. But with certain images. So how much compression is just enough? That depends on what you're. If you intend to use the image to create a wall size. TIFF or RAW format. That will give you. But. if you're just taking a snap shot that you'll be sending out in an email. You won't see the difference on. I personally save all of my JPEG files at 9. I would not. recommend saving at less than 9. For Web images 8. Digital Media Cards Your camera can take one of several types of. Your camera's manual will tell you what. The smallest cards readily available today are 1. The. largest are the monster 8 GB, yes eight gigabyte cards from Lexar. But. those monster cards carry a monster price. That 8. GB card currently retails. Smart. Media. Until the advent of the MMC (below), this was the. They range in. capacity from 2 megabytes up to the 1. Multi. Media. Card (MMC): This is the smallest and thinnest of the. At about the size of a postage stamp, and a. Smart. Media, the MMC is available in. Memory. Stick: Invented by Sony, the memory stick is shaped. Sony has licensed the memory stick to. Lexar Media and San. Disk, which will also produce the memory. CD- R: This. is a 3- inch CD- Recordable and is currently used by only one. Sony CD Mavicas. It. Once. it has been filled, it is permanently full. But at a cost. Image at left from Imaging. Resource)Compact. Flash (Types I and II): This is the most commonly used. With similar dimensions. Smart. Media, but about 3x thicker (about 3 credit cards thin). CF is available up to 5. Type I, and up to 1. Type II in the form of IBM's "Micro. Drive". which is not really "flash" memory, but a truly tiny. D Card. This is the newest addition to the flash memory card race. Fuji and Olympus. These things just. Subscribe to. Vivid Light Photography by email Tell. Us What You Think.
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