resolution

Discussion in 'Digital Discussion & Q&A' started by Morelos, Dec 10, 2004.

  1. Morelos

    Morelos TPF Noob!

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    whats the minimum resolution/mega-pixels I need to have 8x10 digital prints? and 5x7 ?


    yeah, so... thanks in advance
     
  2. mrsid99

    mrsid99 TPF Supporters Supporting Member

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    I've made a decent 8x10 from a 2Mp camera with a JPEG file size around 500K to 600k but that's about the limit and it depends on the pic and subject matter.
     
  3. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

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    It's purely opinion. Many folks would say 300ppi. That isn't anywhere good enough for me.
     
  4. rangefinder

    rangefinder TPF Noob!

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    I used to use a Nikon D1 (3MP) and we routinely printed 8x10 from them. You need to get good exposure and the best cropping you can - in the camera.

    Then crop at 300 dpi. There's not much value gained in going beyond 300 dpi. The reason for that being the human eye can only see around 300 not more than that. Most printers are therefore made to print at 300 dpi and normally discard any file info in excess of that.

    The one common exception to this is the Fuji Pictograpghy series which prints at 400 dpi.
     
  5. Digital Matt

    Digital Matt alter ego: Analog Matt

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    A 2.1mp camera (1600x2100 pixels) can be stretched to an 8x10, but I wouldn't go higher than that.

    An 8x10 is 2400x3000 pixels at 300 DPI.

    I've done it with "good" results on my old 2.1mp cam, but you can see the distortion if you are looking closely.
     
  6. Morelos

    Morelos TPF Noob!

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    now I'm confused, what is DPI ?
    damn... is there a thread about that somewhere?
     
  7. rangefinder

    rangefinder TPF Noob!

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    You're not alone there. A lot of people still struggle with the two concepts of pixels and dots. I can't explain it - I just "understand" it. Or rather accept it.

    Printers use dots, hence dots per inch (dpi). Electronic images use pixels per inch (ppi). If I remember correctly 2ppi=1dpi.

    So now that we have you seriously confused do a mental erase and remember if you are going to print a hard copy then you'll want your final image to be length X width @300dpi.

    So you download the camera. Open your imaging software (PhotoShop). Select the crop tool, specify the size (8inches x 10 inches for example), specify the dpi at 300 and make your crop. Do you image management (color correction, brightness/contrast, etc.) and save the image. Now you're ready to print.
     
  8. Morelos

    Morelos TPF Noob!

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    ah, now I see, thanks a lot, rangefinder! :cheers:
     
  9. Morelos

    Morelos TPF Noob!

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    ah... now something is bad... photoshop asks me the resolution in PPI, not DPI... so, if you said 2ppi = 1 dpi, am I supposed to set it to... 600dpi? ???

    The image size is now 82.4 M !!! is that 82.4 MB?! wtf?!
     
  10. Morelos

    Morelos TPF Noob!

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    ok, now I'm seriously confused, haha
     
  11. rangefinder

    rangefinder TPF Noob!

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    Just poke in the 300 for the cropping tool.

    This is confusing but...just poke in 300 and you'll be fine.
     
  12. Patrick

    Patrick TPF Noob!

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    What the????
    Now I'm confused :shock:
     

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