Megapixel enlargement?

Discussion in 'Digital Photography' started by UWF404, Jun 6, 2006.

  1. macrumors regular

    Joined:
    Jan 6, 2004
    #1
    Have a EOS 20D which shoots at 8.2 MP. How large a print can I get?
     
  2. Guest

    iGary

    Joined:
    May 26, 2004
    Location:
    Randy's House
    #2
    Depends on how "good" the image is.

    I get very nice 16 X 24's out of mine, and have gotten some decent 20 X 30's.
     
  3. macrumors regular

    Joined:
    Sep 27, 2004
    #3
    A rule of thumb

    you divide the DPI by of the resolution of the photo.

    take the highest resolution of the 20d is 3504 x 2332 and divide that by 300 DPI that would be 11.68 x 7.73, Now you can lower the DPI and get bigger prints but the qaulity/sharpness of the print won't be as high.

    hope that helps...
     
  4. macrumors 6502

    gman71882

    Joined:
    Jan 12, 2005
    Location:
    Houston, Tx
    #4
    If it supports RAW images then you could theoreticaly go much bigger.
    With RAW proccessing you could scale the image up a Huge amount in Photoshop and go larger than 24 x 30 if you wanted.
     
  5. macrumors G4

    Applespider

    Joined:
    Jan 20, 2004
    Location:
    looking through rose-tinted spectacles...
    #5
    As regards 'sharpness', it does partly depend on what you intend doing with the image.

    If it's something that you're likely to end up an inch away from, then you'll want it a heck of a lot sharper (and therefore smaller) than something that you'll usually be viewing across a room.
     
  6. macrumors G3

    Chip NoVaMac

    Joined:
    Dec 25, 2003
    Location:
    Northern Virginia
    #6
    And I will point to 24x36 prints that we have in our store from a Nikon D50 NEF file
     
  7. macrumors 68020

    Raid

    Joined:
    Feb 18, 2003
    Location:
    Toronto
    #7
    I'm resurrecting this thread as I have a similar question:

    While away on vacation I got a shot of the wife and I that she absolutely loves; and now she would like to print it on 16"x20" to fit a particular frame.

    I took the picture with my Canon Powershot G2, using max resolution and file size for the camera (2272 x 1704 with 3.8 Effective Mega pixels, in jpeg format). Would I be able to go up to a 16"x20" print with reasonable image quality?

    I tried doing the math above (i.e. 2272/300 by 1704/300) which translates into about 7.5" x 5.7" :(
    Of course I could lower the dpi but using that formula I'd have to go down to about 114dpi...

    Also is their a shop/chain that could do this without costing me big $$'s?
     
  8. macrumors 6502a

    Airforce

    Joined:
    Jan 12, 2006
    #8
    Walmart ;)
     
  9. macrumors 68020

    Raid

    Joined:
    Feb 18, 2003
    Location:
    Toronto
    #9
    Ack! I should have specified decent and technically competent to the shop/chain description! ;)
     
  10. macrumors 65816

    Kamera RAWr

    Joined:
    May 15, 2007
    Location:
    I'm where I need to be
    #10
    My aunt has the Rebel XT which is 8mp and she gets fantastic prints at 11x14.
     
  11. macrumors G4

    Joined:
    Jan 5, 2006
    Location:
    Redondo Beach, California
    #11
    Of course you could, You can get a big blurry image 12 feet wide if you want. Photoshop can scale imaegs but it can not invent new detail that is not recored by the camera.

    The most common rule is that for good quality you need 300 DPI for prints that will be viewed at arm's length. If the viewing distance is farther away, say 6 feet you can drop to 150 DPI and make the print twice as large. Some people will push the 300 DPI rule down to 250 DPI or even 200 DPI but it depends on your personal quality standards and what you call "good"
     

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