After processing my 7D RAW files using DPP and I go to process them as 16 bit TIFFs, I am confused as to the best setting. Using Lightroom in the past with my 30D files, when exporting files as TIFFs I would always export as 300ppi (this was what came up automatically in LR, and it seems to be a standard). With the 7D files, DPP automatically comes up with 350ppi. I don't know if it is pest to leave it at 350ppi or change it down to 300ppi. I am assuming that it is best to leave it at 350ppi, however I don't like making decisions without knowing why I am making them.
What I am asking is am I best off converting the processed RAW files as a 300 or 350ppi TIFF, and why??? Does anyone know if this difference is related to the differing cameras, or the software. I have never really heard about ppi over 300.
Thanks in advance
ps: The attached image was converted to a 350ppi 16bit TIFF in DPP, and had a few minor tweaks in LR (but will be done properly in Photoshop when I get the chance). I know it's not a fantastic shot, but there is something about it that I like. Obviously it was downsized for web use.