Eric Weir wrote: >> On Dec 13, 2017, at 12:38 PM, Mark Roberts <postmas...@robertstech.com> >> wrote: >> >> Downsize everything to 2000 x 6000 pixels >> Convert to sRGB color space >> Give 'em hi res JPEGs and wash your hands of it. >> >> The 6-megapixel size will work on most phones and tablets (my tablet's >> native resolution is around 5MP) and allow them to zoom in without >> getting pixilated. JPEG format in sRGB will let them go to any local >> shop with a print kiosk and make their own prints. Done. > >Thanks, Mark. Clear and helpful overall, but Im a bit unclear about the >relation of pixel size and print size. You suggest 2000 X 6000 pixels. Will >that work for a print of any moderate size, e.g., 4X6 or 5X7? Dont I need to >specify pixels per inch? Likewise in setting pixel size for use on phones and >tablets. Doesnt pixels per inch need to be specified there too?
Don't worry about setting ppi. Consumer printers will handle that by themselves when the customer chooses a print size (and I've printed up to 12 x 18 from 6MP ist-D files). For phones and tablets the display driver will scale the image appropriately, regardless of ppi. I don't think there's a phone made these days with less than an 8-megapixel camera so they can handle images at least that big, by definition. In short, there's no need to make high-resolution and high resolution versions of the images: Give 'em 6MP and they'll be able to show the photos on their phones and print as large as they're ever likely to want. Less work for you. -- Mark Roberts - Photography & Multimedia www.robertstech.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
