Re: What is the best format to photograph in?

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Thanks
I did check and the camera setting was on
"1/12" compression setting.

I fixed this and now it only compresses to
"1/4" which gives a jpeg file size of about
4Mb.
Regards.

"Yves Alarie" <rd50@@@pitt.edu> wrote in
message
news:ewbCmwgxGHA.2264@xxxxxxxxxxxxxxxxxxxxxxx
Yes. 4 MB makes sense. Each manufacturer
implements compression differently so 4 to
5 MB would be about right and 1.5 MB is
much too low, did not make sense to me. So
I wanted to alert him to check the
settings. Just hope he comes back and get
our messages!


"Tom from WI"
<not_read_address@xxxxxxxxxxxxxx> wrote in
message
news:uOHUDZgxGHA.1364@xxxxxxxxxxxxxxxxxxxxxxx
I have an 8 megapixel Canon Digital Rebel.
The highest quality jpg files are usually
around 3.9MB.
Tom
"Yves Alarie" <rd50@@@pitt.edu> wrote in
message
news:uSt8fMgxGHA.4256@xxxxxxxxxxxxxxxxxxxxxxx
This is what you wrote:

"The photos I take with the camera
are pretty good for detail when I use the
max
size (3200 x 2400) which have a size of
1500Kb each. Even without a tripod."

Although I do not know what kind of
camera you have, this does not look right
to me.
If the size is indeed 3200 x 2400, the
JPG file size should be at least 5000 KB
if you set the camera recording for the
highest quality JPG compression.



"Frank Martin" <pj@xxxxxxxxxx> wrote in
message
news:uGgbOUZxGHA.4444@xxxxxxxxxxxxxxxxxxxxxxx

"Michael J. Mahon" <mjmahon@xxxxxxx>
wrote in message
news:h5ednQh3S7L-wXfZnZ2dnUVZ_qydnZ2d@xxxxxxxxxxxxxx
Frank Martin wrote:
I have been advised to use "tiff" for
permanence but these files are very
large indeed (eg 25mb each).

If you're not a professional
photographer, you can
pretty well forget about TIFF format.
Moderate
compression JPEG files (10:1 or less)
do an excellent
job of preserving *relevant*
photographic information
and are perfectly satisfactory for most
needs.

Sometimes I have to take about 100
photos in a session, so this can
result in storage problems.

Using .jpg format will cure your space
problems.

Is it possible to take the photos in
"jpeg" in the field, then download
these to the computer, and THEN
convert them all to "tiff"? Would this
have the same effect?

No, once a picture is compressed with a
lossy
compression method, the information
cannot be
reconstituted. However, as noted
above, unless
you have a truly unusual application,
.jpg files
will preserve all the detail you want.

If you have doubts, try taking the same
picture
saved as a .tif and as a .jpg, then
display
them both side by side at 100% and see
if the
differences are important. I think
you'll find
that they are insignificant in almost
every case.

Similarly, would it matter if I
operated on the "tiff" files (rotating
the image, photoshopping, adding typed
annotations etc) and THEN converting
to "tiff" for permanent storage?

Forget about .tif. First, never
overwrite your
original .jpg files, so you can always
start over
with the originally recorded detail.

Second, if you want to do separate
"enhancement"
sessions in Photoshop, save the file in
Photoshops
native .psd format--it retains
everything, including
your layers, masks, history, etc.

Once you are satisfied with a photo and
want to add
it to your "collection", save it as a
moderately
compressed .jpg again (quality 8 or
more in Photoshop).

Purists will argue that you should
record everything
in TIFF or RAW mode, but if you're not
a professional
photographer, this is gilding the lily.

-michael


Home page:
http://members.aol.com/MJMahon/

"The wastebasket is our most important
design
tool--and it's seriously underused."

Thanks. The photos I take with the
camera are pretty good for detail when I
use the max size (3200 x 2400) which
have a size of 1500Kb each. Even without
a tripod.









.

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