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Old Jul 10, 2018, 9:51 PM   #11
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Hi TCav,
"If you had ordered 8x10s, you'd probably have gotten the same 300dpi resolution, but the result would have been a much higher resolution image that you could put on a flatbed scanner and gotten great digital images from." Oh, well, now that's interesting. For some reason I assumed that larger prints would mean lower dpi, i.e. lower resolution, like blowing up a digital image. But that's not how it works?
..... john
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Old Jul 10, 2018, 10:05 PM   #12
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OK. That makes sense.
But, if you were to compare a 4x6 print to a 12x18 print, both at 300dpi, wouldn't the 4x6 look sharper?
..... john

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Originally Posted by VTphotog View Post
If you open the CD and look at the properties of the images, it should give you the size of the image in pixels. Pixels correspond with dots in printing, so if your prints are 4"x6", at 300 DPI, that would give you 1200x1800 pixel images, around 2 megapixels.

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Old Jul 11, 2018, 8:55 AM   #13
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Originally Posted by Shinnen View Post
For some reason I assumed that larger prints would mean lower dpi, i.e. lower resolution, like blowing up a digital image. But that's not how it works?
If the 300dpi prints are all made from the same analog source, the resolution of the scan being unknown, a 4x6 print would have a resolution of 1200x1800 pixels, but an 8x10 print would have a resolution of 2400x3000 pixels.

A 35mm film exposure is 24x36 mm, so if it's scanned at 2400 dpi (which is not unusual, but something the lab tech you talked to probably wouldn't know), that's a 2268x3402 pixel digital image. That will produce a 7.6x11.3 print with a pixel-for-pixel image. That can probably even be upsampled slightly without degrading the image.

The CD will probably contain the original scans, so the resolution of those files is probably more useful than the prints themselves.
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Old Jul 11, 2018, 9:08 AM   #14
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Hi TCav,
Thanks for the explanation. I'm going to have to think about what you've said.
Right, well, I'm not getting the prints, just the scans on a CD. The scans would be more useful than the prints because they wouldn't require scanning for further processing?
.... john
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Old Jul 11, 2018, 7:40 PM   #15
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Quote:
Originally Posted by Shinnen View Post
Hi TCav,
Thanks for the explanation. I'm going to have to think about what you've said.
Right, well, I'm not getting the prints, just the scans on a CD. The scans would be more useful than the prints because they wouldn't require scanning for further processing?
.... john
Exactly.

When you get the CD, can you let us know the resolution of the images?
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