Re: JPG / TIF

Also, JPEG uses lossy compression, which means you lose some of the
data each time you save, it is discarded in favour of smaller file
sizes. If you just save once and keep the image quality high (max. 12)
you will likely see little or no difference to a TIFF file, which saves
in lossless format - meaning none of the information is discarded, thus
resulting in higher file sizes.

As far as I know, TIFF is the prefered file type for printing since any
degradation of an image would be more noticable in a print. But if
saving simply for the web I see no problems with JPEG at all.

In an ideal world we would all have large enough hard drives to be able
to save a high quality TIFF copy and a high quality JPEG copy of each
image (I tried doing so myself for a while) but at 35mb a shot minimum
if space is at a premium it becomes unrealistic very quickly.

I think if you ever want to make a proper go of selling prints
professionally then you will want to invest in some serious storage to
have TIFF files of all your images, but otherwise don't worry.

Of course, this brings up the problem of what if you have already
converted all your files to JPEG? You can't then go back and make a
high quality TIFF file from them because information has already been
discarded and it will never be as good as it would have been had your
first ever save been a TIFF save. If you shoot RAW and know how to
replicate your final JPEG image then hold on to all the RAW files so
you can create a TIFF file when needed, but then they are pretty hefty
in size sometimes too, so why not just save a TIFF file at the
beginning? Gah! There are no easy answers - you have to do what is
right for you.

Cat
--------
http://snaps.catbc.com

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