At Luminous-Landscape, the ratio on page 12
http://luminous-landscape.com/wp-con...nner-Final.pdf
is given as: 6400ppi scan of 6x7cm negative gives a printable 58x40in
So if all I want is to get 30x20 prints from a 4x5 negative, 1800ppi scans would provide an almost 1 for 1 ratio of input to digital file output ready for printing.
Am I understanding this correctly?
He is assuming a 360ppi printing. My service is asking asking for 254ppi file. I know I don't want to upsample (ie. invent pixels) but is there a problem with 'downsampling' or is there less issue with this. It doesn't have to be an exact one for one does it?
Also: The Luminous paper talks about outputting at 16bit/channel mode. But my printer is asking for 8bit/channel. What is the effect of doing this? The file size of half but does this reduce the quality of the print ?
Thanks
Alan
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