Post by Snappersforum on Jul 21, 2013 8:45:24 GMT
CompactFlash Memory Cards
One of the most common types of cards used in cameras is the CompactFlash memory card. Most digital SLR cameras use this type of card. CompactFlash cards have a controller chip inside them which enables the user to download information from the memory card at high speeds.CompactFlash memory cards come in two sizes: Type I and Type II. Type II memory cards generally hold more information than Type I cards. These cards are relatively inexpensive and are popular because of their speed.
SDXC (Secure Digital 'Xtra Capacity') Memory Cards:
These are SD cards but with a much higher capacity and faster processing speeds. These have a maximum capacity of 2TB (Terabytes). Similar toSDHC, in that anSDXC fits in a normal SD slot - but your camera may not be able to recognise this newer technology, so always check in advance. Computers also need to be able to read the exFAT filesystem to be compatible with SDXC. Currently Linux,Windows 7, Mac OSX (Snow Leopard) and some earlier versions of Microsoft Windows are compatible.
Secure Digital and MultiMedia Cards
Secure Digital andMultiMedia cards are the smallest type of memory cards available, and have a
maximum storage capacity of 512MB. The only difference between a Secure Digital memory card and a
MultiMedia card is that the MultiMedia card does not have a write-protect switch. This switch can
protect the information on the card from being accidentally wiped off or re-used. Secure Digital andMultiMedia cards can also be used in Mobile Phones and MP3 players.
Eye fi Cards
Eye-Fi cards have been around for some time now. The SD card-sized devices not only store your camera's photos on local memory but include a Wi-Fi chip, allowing you to upload your photos to an online store without having to remove the card from your camera. They're immensely useful if working on location as you can also have the files appear on your laptop as soon as they're uploaded.
xD Picture Cards
xD stands for "extreme digital," and xD picture cards are very small, measuring less than an inch in
width and length. The xD card can be used in conjunction with an adapter so that it can also be used in cameras. The largest capacity512MB.
Micro SD Memory cards
Micro SD cards were initially a popular method of storing images in mobile phones. In actual size they are the smallest available memory card at 15×11×1mm but can store up to 2GB of information. The
Micro SDHC versions are able to store much larger files from 4GB-32GB.
Memory Stick
The Memory Stick was originally created by Sony to use in their CyberShot camera. The Memory Stick can still only be used in Sony cameras. The Memory Stick has a capacity of 256MB. The Memory Stick Pro Duo is a smaller version of the Memory Stick. It has a capacity of 1GB but cannot be used in the same cameras as the Memory Stick.version of the Memory Stick. It has a capacity of 1GB but cannot be used in the same
cameras as the Memory Stick.
MicroDrive
TheMicroDrive is a miniature hard drive housed in the chassis of a CompactFlash Type II. On the negative side, the MicroDrive has a tendency to be unreliable, and there are moving parts inside the card which tend to break or wear down quickly. They use more battery thanflash memory cards, and they are fairly slow. However, they are less expensive than other memory cards.
UHS-I standard:
UHS-I standard SDHCcards were recently released by Sandisk and aim to offer quicker transfer rates, increasing write speeds up to 45MB/s or faster. The
Sandisk Extreme Pro card matches up with the sheer amount of data streaming
through the camera's buffer when shooting lots of Raw files or high quality HD movies. Prices range between around £50-£190 depending on the capacity (currently 8-64GB).
UHS-II cards
UHS-II cards also have a second row of electrical contacts to aid in the speed boost. If your memory card reader or camera does not have the second row of contacts, the speed will be more in line with UHS-I cards. A card’s UHS classification is a good way to help gauge its burst speeds.
U3- Minimum 30 MB/s Read
U1- Minimum 10 MB/s Read
Memory Card Speed
Different memory cards work at different speeds. The speed of a memory card affects how
long the card takes to process data. The speed at which a memory card downloads images onto a computer is known as the read speed. The speed at which it can save a photo and be ready for the next shot is known as the write speed. Manufacturers do not use the same terms to describe the speed of their memory cards. Some cards use a "times speed rating," (e.g. 12x or 40x), where 1x equals a transfer rate of 150 kilobytes per second. Thus, a 12x speed rating equals a
transfer rate of 1,800 KB (1.8 megabytes) per second. Some manufacturers write memory card rates as MB/second.Many SD memory cards use a Class Rating to describe the speed of the card.
There are four Class Ratings: 2, 4, 6 and 10. The chart below shows the Class Rating and the equivalent minimum transfer speed.
One of the most common types of cards used in cameras is the CompactFlash memory card. Most digital SLR cameras use this type of card. CompactFlash cards have a controller chip inside them which enables the user to download information from the memory card at high speeds.CompactFlash memory cards come in two sizes: Type I and Type II. Type II memory cards generally hold more information than Type I cards. These cards are relatively inexpensive and are popular because of their speed.
SDXC (Secure Digital 'Xtra Capacity') Memory Cards:
These are SD cards but with a much higher capacity and faster processing speeds. These have a maximum capacity of 2TB (Terabytes). Similar toSDHC, in that anSDXC fits in a normal SD slot - but your camera may not be able to recognise this newer technology, so always check in advance. Computers also need to be able to read the exFAT filesystem to be compatible with SDXC. Currently Linux,Windows 7, Mac OSX (Snow Leopard) and some earlier versions of Microsoft Windows are compatible.
Secure Digital and MultiMedia Cards
Secure Digital andMultiMedia cards are the smallest type of memory cards available, and have a
maximum storage capacity of 512MB. The only difference between a Secure Digital memory card and a
MultiMedia card is that the MultiMedia card does not have a write-protect switch. This switch can
protect the information on the card from being accidentally wiped off or re-used. Secure Digital andMultiMedia cards can also be used in Mobile Phones and MP3 players.
Eye fi Cards
Eye-Fi cards have been around for some time now. The SD card-sized devices not only store your camera's photos on local memory but include a Wi-Fi chip, allowing you to upload your photos to an online store without having to remove the card from your camera. They're immensely useful if working on location as you can also have the files appear on your laptop as soon as they're uploaded.
xD Picture Cards
xD stands for "extreme digital," and xD picture cards are very small, measuring less than an inch in
width and length. The xD card can be used in conjunction with an adapter so that it can also be used in cameras. The largest capacity512MB.
Micro SD Memory cards
Micro SD cards were initially a popular method of storing images in mobile phones. In actual size they are the smallest available memory card at 15×11×1mm but can store up to 2GB of information. The
Micro SDHC versions are able to store much larger files from 4GB-32GB.
Memory Stick
The Memory Stick was originally created by Sony to use in their CyberShot camera. The Memory Stick can still only be used in Sony cameras. The Memory Stick has a capacity of 256MB. The Memory Stick Pro Duo is a smaller version of the Memory Stick. It has a capacity of 1GB but cannot be used in the same cameras as the Memory Stick.version of the Memory Stick. It has a capacity of 1GB but cannot be used in the same
cameras as the Memory Stick.
MicroDrive
TheMicroDrive is a miniature hard drive housed in the chassis of a CompactFlash Type II. On the negative side, the MicroDrive has a tendency to be unreliable, and there are moving parts inside the card which tend to break or wear down quickly. They use more battery thanflash memory cards, and they are fairly slow. However, they are less expensive than other memory cards.
UHS-I standard:
UHS-I standard SDHCcards were recently released by Sandisk and aim to offer quicker transfer rates, increasing write speeds up to 45MB/s or faster. The
Sandisk Extreme Pro card matches up with the sheer amount of data streaming
through the camera's buffer when shooting lots of Raw files or high quality HD movies. Prices range between around £50-£190 depending on the capacity (currently 8-64GB).
UHS-II cards
UHS-II cards also have a second row of electrical contacts to aid in the speed boost. If your memory card reader or camera does not have the second row of contacts, the speed will be more in line with UHS-I cards. A card’s UHS classification is a good way to help gauge its burst speeds.
U3- Minimum 30 MB/s Read
U1- Minimum 10 MB/s Read
Memory Card Speed
Different memory cards work at different speeds. The speed of a memory card affects how
long the card takes to process data. The speed at which a memory card downloads images onto a computer is known as the read speed. The speed at which it can save a photo and be ready for the next shot is known as the write speed. Manufacturers do not use the same terms to describe the speed of their memory cards. Some cards use a "times speed rating," (e.g. 12x or 40x), where 1x equals a transfer rate of 150 kilobytes per second. Thus, a 12x speed rating equals a
transfer rate of 1,800 KB (1.8 megabytes) per second. Some manufacturers write memory card rates as MB/second.Many SD memory cards use a Class Rating to describe the speed of the card.
There are four Class Ratings: 2, 4, 6 and 10. The chart below shows the Class Rating and the equivalent minimum transfer speed.