 Angie M. Nemanic |
Scanning Negatives and Slides I primarily shoot film and slides, but I've been getting various ones scanned at my local photo store. What is the resolution should I be asking for if I plan to make 8x10 or larger? Or for that matter any size? I'm taking very tiny baby steps towards digital. Also, what's the difference between tiff and jpeg when they are scanned? Any help is great!! Thanks!! Angie
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anonymous |
The resolution should be 300dpi for any size but when you ask for an 8x10 ask for it scanned at 300dpi. If you scanned an image at 300dpi for a 6x4 once you enlarged it the dpi would decrease. So just ensure what ever size you want, it is scanned at 300dpi, you could even enlarge that a little and reduce the dpi down to maybe 200dpi without much quality loss, especially for large prints considering you view them from a greater distance anyway. Hope this helps and I didn't confuse you, I find it hard to explain. Difference in jpeg and tiff. Jpeg compresses the file and tiff doesn't. So after scanning save as a tiff, do all your edits in tiff mode, if the file is too big to take to a printer, then convert to jpeg (select minimial compression)this will usually convert a 22MB tiff file to a 2MB jpeg file. You can now print. I usually work on on all my files in tiff mode, when I am finished and don't have any more edits to do, I then convert to jpeg. If you have a lot of them, you can batch process them.
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Angie M. Nemanic |
Great info!! Thanks
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doug Nelson |
Natalie is right with her figures for scanning a print. Film is so tiny, however, that we have to scan it at a higher pixels per inch figure if we are going to size it out for printing. Scan at about 2400 ppi minimum. All film scanners can do this, and some flatbeds with film adapters. Your negs and slides may have been scanned at this resolution. When you open a resulting tif image in Photoshop or Elements, look at the Image/Image Size screen. UNcheck Resample and enter 10 as your image width, if its a horizontal 8 x 10 you want. Your resolution (pixels per inch) will read somewhere between 240 and a little over 300. This is good input resolution for nearly all printers. OK that and you will have your tif image print out as 10 inches long by a width in proportion to the negative's dimensions. You are better off printing your tif just as it is. You will be giving the printer all the information it needs, and maybe a little more (no problem). You can, of course, print a jpeg image, IF the resolution falls not much lower than about 240 ppi. Some printers can work with even lower resolutions. Jpeg is perfect for sizing images for the web or to send as attachments. They are compressed, just enough to retain image and color integrity, and enough to make the file a manageable size. Camera store printing machines sometimes can't take too big a file size. Ask the store people what the ideal input resolution is for their machine.
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Angie M. Nemanic |
This is great information!!! Thanks very much. Angie
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anonymous |
Yep, that is why I have to print in jpeg, my printer can't accept tiff. Well they can, but only on their main computer, and it is cumbersome, and personally I can't see any difference. I just have to be carefull when I batch tiff to jpeg, for some reason I loss all of the warmth in my photos - haven't worked out why yet.
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doug Nelson |
The shortcut approach, feeding images direct into the printer, works well for images right out of the camera. They print OK if the resolution is high enough. There is often little apparent difference in the appearance of a tif and a high quality jpeg. In your conversion, you should not be losing that much. In a Photoshop-based imaging program (like Elements), you save to jpeg with degrees of jpeg resizing that you control. The way you are doing it, you are losing some color integrity in the process. My web site has some tips for doing this conversion in "Your Images On Screen".
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doug Nelson |
Also, on my site, see the article on Printing. If you must feed a jpeg into your printer, disregard the resolution figure of 72 in the "...On Screen" article. Try 150 ppi, and if you want better quality, 240 ppi.
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