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Is there anyway that I can increase my captured images to 300ppi at the point of capture? When I use JPEG and open the image in Photoshop (elements or CS5) the ppi is 72. With RAW I get 240ppi.
Cameras in question are 30D and 5D mark ii
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PPI is totally irrelevant until you want to output the image onto a printer. Cameras do not care about ppi and just concentrate on actual pixel sizes.
PPI is only a setting which tells a printer how tightly to pack the pixels from the image into the output. The higher the number the more tightly packed your image will be and therefore the higher the quality will be.
In fact, it wouldn't matter if you never changed the ppi setting as long as you tell the printer what the output size was (eg 297mm x 210mm).
Hope that helps.
Oh by the way, in case you aren't aware. PPI = Pixels per inch and is the term used to denote display resolution. DPI = Dots per inch and is the term used for printer resolution.
The only control you have over display resolution is to change the settings on your monitor (eg 1024x768), the setting embedded in the image has no bearing on the matter.
Ian is bang on, it doesn't alter the quality or the resolution of your picture. If you're not careful and you change it and the picture gets resampled (pixels invented or discarded) you will damage the picture quality.
Have a read of this and this
I was getting myself all in a tiswas about the requirements from microstock companies - prob best to read the small print again
Caroline, just switch the resolution to 300ppi in Photoshop, making sure that resampling is switched off. The file size and pixel dimensions shouldn't change, although the 'document size' will.
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