Surely the operating system writes nothing to the file, especially as you are not using it to resave the images. Differences in file size it seems tome come about as a result of resaving the file in different progs at different compression levels. With the file you refer to I saved it in PS using the Save for Web command but had to go much much lower than normal,round about 30% to get it to the size you had. Normally I would use no less than 50% for a file approx 800pix wide to keepit under 200kb. BTW Save for Web in PS strips out all the exif data.

With regard to your printing Don, I can't help feeling that the banding to which you refer was as a result of printing on ordinary letter paper and the standard print quality, it could also mean your print heads could do with cleaning :)

There are many reasons why you may want to upsize the file Don. However my brother uses a 300D and takes his pics at 1600 pix wide :( His thinking is that as he only ever has them printed to 6x4 there is no need to take them any bigger. There is little point in me trying to explain to him :)

If you want to have large images printed then you may need the extra file size
The extra file size may allow you to edit them more easily, or crop them to maintain a decent print size
Most reputable stack libraries ask for 40mb files these days. They allow upsizing but no sharpening.

Practice, practice and more practice
 

To look at using laptop control of the camera I took a pcture of a Dividing Head in my workshop.

Due to the flourecent lights in the workshop and using a slow shutter speed, the resulting images had a colour cast. This is most obvious in the Collet Chuck ( black object in left forground ). At the time I took 2 pictures, a JPG and a RAW in order to post screen captures in the ' Camera Remote Control through a PC ' thread.

With a visit from Nikon Foxy Bob on the cards for a bit of digi darkroom tutorial, I thought this was a good pic to get some practice in.

I took the TIFF created from the origonal NEF file and had a go at correcting it in CS2 ( more to learn ). I am quite chuffed with this but comments welcome.

I have attached a composite, from left to right, of the origonal JPG - my first converted TIFF and the latest result. I tried to title them but the composite suffered badly from compression artifacts.

Origonal JPG is in the Flash thread, and origonal NEF conversion in my gallery. Latest full size here.

Don

Had a quick twiddle (so to speak!)

Nice one Adey. I like the rich colours it gives it an autumnal feel.
I am sorry your post is before mine but when I moved it to this thread its in a slightly different order.

The photo should be before Adeys edit.
I would be interested to see what else can be done other then what I have already done.

Christine,

Adeys is very good and better than I could manage in colour.

Here is my version.

I thought this to be quite a difficult one. Not very happy with my attempts to retain it in colour, so thought I would try an IR effect. Only the second attempt at that and all stages done in line with an article in AP 13th October. ;)

A case of using all my programs as I only understand bits of each :rolleyes: , so a bit in NX then to CS for an IR conversion then to Paint Shop Pro 8 for the border ( don't know how to do that in CS ) then back to CS for conversion from Tiff.

Don

A nice effect Don, it brings out the trunks of the trees a bit more in IR.

The photo is not the best quality but there is plenty of detail, I could only come up with giving more saturation to lift it a bit.

Here is a good website to get some of the plugins for CS so you don't have to keep switching programs.
http://www.atncentral.com/download.htm

Christine,

Wow looks to be a lot of stuff there. Now bookmarked for an in depth look. I have not used actions before so a bit more swotting up. :)

Don

Don, when you unzip the files put them in this folder.
\Program Files\Adobe\Adobe Photoshop CS3\Presets\Actions

If it was posted in the middle of summer I'd probably have given it a totally different treatment!

Anyone want to have a play with this?