PDA

View Full Version : Canon 20D and Raw Imaging


dsktc
10-02-2004, 07:15 PM
As Jonathan Guy and I explore the capabilities
of the Canon 20D, the issue of post-processing
an image of 3504 x 2336 pixels and resizing it
for the web becomes of critical importance.

Yesterday, I shot four Raw photos with the 20D,
the first time I used Raw with this camera.

I submitted one of the photos of yesterday's
NS 18N to RP.Net:

http://www.railpictures.net/viewphoto.php?id=80017

I had converted this from Raw to a JPEG in the
Canon EOS Viewer Utility, rotated it, cropped it slightly, brightened
it a wee bit, resized it for RP.Net at about 34%, and applied
moderate unsharp mask:

I then posted this and the full-sized JPEG on the
10D Yahoo Group.

http://groups.yahoo.com/group/Canon-10D/messages

One of the members thought the photo was oversharpened.
Re-examing the RP.Net version, it does now appear to be oversharpened.

Today, I created a TIFF file from the Raw image and then
processed it in Paint Shop Pro, applying less Unsharp Mask
to the final saved JPEG than I did to yesterday's RP.Net
photo and the full-sized processed JPEG. The new full-sized
JPEG can be seen here:

http://www.pbase.com/dsktc/image/34523531/original

There is a wealth of detail in this photo, which was taken
hand-held, and the level of USM I think is about right.

There is a learning curve with this new camera, and when
I use Raw again, I will be a little more conservative
with the USM when I resize and submit photos to RP.Net.

Dave

Jonathan Guy
10-04-2004, 12:21 PM
Dave,

What are your thoughts on the EOS Viewer Utility? I've read that its slow and well, kludgy, for lack of a better term.

I've never shot a single frame in RAW, but maybe it's time I start experimenting.

dsktc
10-04-2004, 10:33 PM
Jonathan, I use the EOS Viewer Utility only
to convert the Raw image to a 16 bit TIFF.
Creating the TIFF takes less than 30 seconds,
so that's not terribly slow.

I then use Paint Shop Pro to process
the TIFF, resize it and save it as a JPEG
for RP.NET.

Dave

Jonathan Guy
10-05-2004, 04:43 AM
Thanks Dave. Sounds like you've got a good workflow going. I'll have to try that.