We went from London to Wales to the Outer Hebrides down to Dover and then back to London for a few days. All my pictures are on film - I should get a slide scanner. I wonder how many DPI I'd need to get a decent pic...........
Hi
Bob - back a few pages (329), I posted a pic of my Canon scanner w/ the transparency adapter attached - the maximum resolution achievable for 35mm slides is 9600x9600 dpi, and half that for reflective media, such as prints. When I scanned in many of my slides a few years ago, I used a lot lower resolution just for faster scanning and reduced file size.
For uploading to the web, 72 ppi is usually adequate, although I've also used 150 ppi - that resolution is adequate for monitor viewing although w/ the high resolution of today's computer & iDevice screens, much higher resolutions can be certainly used (of course, w/i the limitations of a forum's rules on upload sizes).
However, if you want to print your scanned slides, then 300 or 600 dpi is needed for high quality, and if one wants a large print, then many more pixels will be needed - the image below equates megapixels needed at different dpi choices (reflecting quality) for various size prints. Dave
P.S. dedicated 35mm slide & negative scanners are available (usually small & less expensive than the type of scanner I own) which claim good results but I've owned a couple over the years, returned one and gave the other to Goodwill - so, if you want to go that route, read the reviews carefully and make sure there is a 'no cost' return policy - just my experience - I'm sure there are some good ones made.
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