Scanning film

[ruslan]

Please tell me, at what resolution should i scan the film 35 mm so that i

should be able to print out photos of the same quality from the CD as if i

printed them from the film itself? jpeg or tiff?

[edgar_njari]

At what size do you plan to print?

[daveish182]

You should aim at around 300 dpi as the best resolution in the print so if you wanted to print at around 8 X 10 " you would need to scan at around 3000 dpi.A maller print size such as 5 X 4" would need 1500 dpi.I think thats about right.If you want to want to keep the image at its top quality save as a tiff.<div></div>

[Ed_Ingold]

As a matter of routine, I scan all images at the maximum resolution and bit depth. I can always dumb a copy of the image down for printing or web use. Scanning is a costly, time-consuming activity. This effort is wasted if you have to repeat the scan for more information. Do your editing before you scan.

[john_shriver]

Yes, always scan at the maximum optical resolution of the scanner. This will minimize grain aliasing.

 

If you don't want to use lots of disk space, reduce the resolution in a photo editor after scanning.

[arnabdas]

Ditto what Edward Ingold and John Shriver said. I scan at 5400 DPI and 64 bit (16 extra bits for the IR channel) -- the maximum my scanner will support.

[terence_spross1]

The scan resolution on a CD supplied from the film processing machine varies by the way the machine is set up and its capabilities. Some venders only provide a scan that is optimised for 5x7. This is done to save time as the scanners in those machine also take more time to scan in their max res. .tiff images have more headroom for further manipulation but usually the files I've seen on vendor supplied CDs are jpegs. Apparently you are satisfied with the CDs you already get. Out of curiosity what is the size of the files you obtain from your photofinisher?

[ruslan]

Thanks, all. I expect to have 1.5-6 mb per fotograph. I do not usually manipulate them with PS. I plan to give them to the couple married. And keep good ones for me.

[James G. Dainis]

Print size/scanning is all straight mathematics.<P>

 

 

 

For a 10 x 8 inch print, when printing at 300 PPI (pixels per inch) you would need a 3000 x 2400 image to start with.<br>

 

3000/300 x 2400/300 = 10 x 8 inches <P>

 

The file size, MP, is the image width in pixels times the image height in pixels.<P>

 

3000 times 2400 = 7,200,000 pixels or 7.2 megapixles (MP)<P>

 

A 36 x 24mm film frame is about 1.4 x 0.95 inches.<P>

 

Scanned at 2500 PPI would get you a 3500 x 2375, 8,312,500 or 8.3MP file. <P>

1.4 times 2500 = 3500<BR>

0.95 times 2500 = 2375<BR>

3500 times 2375 = 8,312,500 or 8.3MP<P>

 

Printed at 300PPI would get you a 11.7 x 7.9 inch print<P>

3500/300 x 2375/300 = 11.7 x 7.9