by: Dave Saunders
Digital cameras are revolutionizing the world
of home and professional photography, but they are married to
memory cards just as traditional cameras are married to film.
Making the best use of memory cards can have a very big impact
on your enjoyment of digital photography. Choosing the right
memory card for the job can be as important as choosing the
right film for a traditional camera.
If you are new to digital cameras, the digital
camera memory cards are the most important parts of any digital
camera, without which they may not work at all. So if you are
handling a digital camera or planning a purchase, you must know
more about the memory cards used in these cameras.
Something many new digital camera owners find
counter-intuitive is that bigger is not always better with a
digital memory card. The actual response speed of your digital
camera can depend greatly on the memory card it is using. The
speed that your camera writes new pictures to the digital memory
card is partially dependant on the transfer speed of the digital
camera but is also dependant on factors in the memory card
itself. Memory cards that have “buffers” can take the data into
a faster type of memory and then transfer the data from there to
the slower “flash memory” which provides the main storage of
almost all digital camera memory cards. Some digital camera
provide their own buffer memory to allow you to take your next
picture while the previous picture is being transferred to the
memory card.
When you delete an image from the memory card
of your digital camera, the flash memory is “reconfigured”
because of special issues having to do with how this memory
stores data. Normally this is an issue that you don't have to
worry about at all. However, if you have a very large memory
card and delete an image, you may experience a several minute
delay while “house cleaning” is performed on the memory card.
Because of this, do not delete images while you are taking
pictures. Instead wait until you are at home, your hotel or in
the car before reviewing your pictures and deleting the ones you
don't want. Smaller cards take less time for this “house
cleaning” so many experienced digital camera owners will choose
to have more than one medium sized memory card instead of one
very large one.
Now the question arises-how many memory cards
are enough for your camera? On an average basis, you must have
at least two memory cards for your digital camera. That is, if
you are using it in a normal and average fashion.
Most professional photographers choose to
carry about four to six memory cards. This helps them shoot
smoothly and constantly. If they run out of memory, they just
take the loaded card out and insert the fresh one. Because
memory cards can malfunction (just like traditional film
canisters, but not as often), you should choose to have at least
two memory cards at all times. By having at least two cards, you
can work with one and keep the other in reserve for emergency.
Having at least one extra memory card for your digital camera
will also ensure that you have the backup protection needed if
you run out of space on your first card or in the possible event
of the first card malfunctioning.
The next important issue is how to take proper
care of these memory cards. The memory cards may seem like some
small and fragile piece of technology, but they are actually
fairly sturdy. The flash memory is encased in a stiff plastic
shell which can withstand normal wear and handling. At one end
of the memory card is either a set of little holes or copper
strips. These are the sensitive part of the card. Any voltage
source or a large jolt of static could corrupt the memory and
probably cause permanent damage to the card. When the card is
not in your camera, it is best to keep it stored in a protective
case or in your camera case. Putting it in your pocket could
cause a short (from your keys perhaps) or dirty the electrical
contracts. There have been instances where the users have
misbehaved greatly with them and the memory cards have yet
survived and continued to function correctly. But, this does not
mean that one should not care for them.
When it is time to transfer your data from the
memory card to your PC, it is best to have a memory card reader,
or have a PC with a built-in reader. The data cables provided
with most digital cameras are very slow compared to the speed of
a “direct reader” and it is often easier to review, copy and
delete images from a memory card when using a reader instead of
through the data cable connection.
When traveling, X-Rays have never been shown
to corrupt the data on, or damage, a digital camera memory card.
The memory card is also not magnetic in nature so the motors in
the X-Ray machine's conveyor belt should not be able to cause
any harm either.
Armed with knowledge comes the power to
benefit from that knowledge. If you have learned something new
about digital memory cards, hopefully you will benefit by
enjoying your digital camera more and finding more opportunities
to take great pictures. |