CF cards redux

wrote:

One thing seems irrefutable -- NONE of the cards are living up to
their claimed transfer rates! Lexar 300x claims 45 MB/s, but
Galbraith's testing shows 24.5 MB/s for jpeg and 30.9 MB/s for RAW.
Those are humongous shortfalls of 44% and 30%, respectively.

And those shortfalls can only be the cards, not the camera?

BTW, does the machinegun method of photography give you any
better images?

-Wolfgang

wrote:

Heh...one thing about hi-res RAW...you've gotta have a lot more
storage for it. When digital finally gets to the equivalent of a color
negative, around 50MP,

Interesting. Any experimental data that proves that a
'color negative' has 50MP worth of data? Or is that a large
format color negative?

-Wolfgang

"Wolfgang Weisselberg" wrote in message
...
wrote:

One thing seems irrefutable -- NONE of the cards are living up to
their claimed transfer rates! Lexar 300x claims 45 MB/s, but
Galbraith's testing shows 24.5 MB/s for jpeg and 30.9 MB/s for RAW.
Those are humongous shortfalls of 44% and 30%, respectively.

And those shortfalls can only be the cards, not the camera?

BTW, does the machinegun method of photography give you any
better images?

I think it does for certain photo subjects. I take mostly wildlife photos
and when they are in motion if you wait to press the shutter until you see
exactly what you want, the action is already over. I often use my camera's
3 frames per second mode and can quickly fill the 9 shot raw buffer on my
Canon 40D. In practice however, I rarely hold the shutter button down for 3
consecutive seconds and most of the time a fast card will keep the camera's
buffer from totally filling.

Those taking photos of sporting events would have the same needs while
landscape photographers would seldom need a fast card.

Ron

On Sun, 30 May 2010 13:28:58 -0500, "Ron" wrote:

The following has test results of reading and writing various CF cards using
a Canon 5D:

http://www.robgalbraith.com/bins/mul...?cid=6007-8198

Ron


"This page was last updated on July 20, 2006"

JJ

Ron wrote:
"Wolfgang Weisselberg" wrote in message

BTW, does the machinegun method of photography give you any
better images?

I think it does for certain photo subjects.

I dunno, part of the skill is to anticipate ...

Those taking photos of sporting events would have the same needs

How did they manage back before power winders? Anyway,
professional sport photographers tend have cameras with much
larger buffers and higher frame rates than your 40D.
Large buffers (and JPEG) reduce the impact of card speed.

-Wolfgang