Thu Dec 15, 2005 3:15 pm
your computer itself will NOT see your raw files...
raw files are basically binary... they aren't even images.... which is why your raw files are relatively small... a file that would be a 35mb tiff is only about 5mb raw... if you aren't starting to understand the implications for this then you need to stop and think about it...
the camera cmos chip really only records b/w... they make color images by making a mosaic of b/w "cells" that have different colored gel over them. each pixel in the mosaic is made up of 2 green gels, one red gel, and one blue gell...
(NOTE: each cell is NOT a pixel)
as so:
GRGB
BGRG
GRGB
if you look at this and read what i wrote, you are probably more flumoxed... but you look at that the grid, you are probably thinking "oh, if each pixel is made up of 4 cells, then this is a 4 pixel grid... actual it is 6 pixels... the pixels actually are made up of overlapping cells...
now, even though cells only see b/w, the gel causes only that color to go through the gel, causing that cell to only see that color...
why is a pixel made up of 2 green, one blue, and one red, when colors are made up of RGB? that is because the camera manufacturers (with the exception of sigma's fovion chip) have determined that green is the most neutral color, and they use that 4th green cell to act as the luminosity cell...
if this all sounds really confusing, it is because it is...
all this binary info means nothing without the file's sidecar file. (what is that, right?) the sidecar file is like a recipe... (with all of the binary data being the ingredients). all the exif data (shutter speed, f-stop etc.) gets put in the sidecar file as info... but even more importantly your white balance (actually a misnomer) your sharpening, your contrast curve, etc., lives in the sidecar file.
when your camera takes the picture in raw, it records binary data, and the directions for how to put it together (which you can completely ignore if you want later)... the image doesn't exist yet!!! this is why your computer doesn't recognize it. none of those things (sharpening, white balance) have actually happened yet... until the file gets processed by a raw processor...
something needs to put it together and make a readable file - and that is your raw processor. (like canon capture, adobe cameraRAW (bundled with photoshop now){ok}, C1 pro {great}, C1 lite {great}, bibble pro {sucks}, etc.
i don't know if your rebel comes with canon capture (or if you have to buy it)... but you might want to try there.
your raw processor runs what is called an algorythm... -a mathmatical equation that goes through the data (and the sidecar file) and builds your tiff or jpeg (and we at pbase already have battled over the whole why jpegs suck thing)... the better the processor, the better the results from the algorythm... the algorythm is actually about 50% of the quality of your image. use a sucky one, and get sucky results... personally, i like C1 pro and C1 lite (from PhaseOne) - it is really well reviewed, and gives great results.
simple:
what i would do, (rather than plug in your camera, which does work, but confuses the computer a bit as you discovered) is get a card reader... plug in the card to the reader, and just copy the files into a folder... then open your raw processor and open the folder or images that way...
(and BTW, i would work in 16-bit... the main advantage for raw anyway)