6mp vs 2mp in a scrapbook

Discussion in 'Digital Point & Shoot Camera' started by grilla, Dec 1, 2004.

  1. grilla

    grilla Guest

    i am a landscape photographer (hobbyist) that shoots large format and 6 x 9.
    i admit i dont know squat about the digital cameras. i am headed to
    manhattan for four days and am considering the dx7630 6 mp camera to carry
    in my pocket. if i never print anything larger than 8 x 10 will i see a
    noticeable difference between the 6mp camera and a 2mp camera? i know the
    word noticeable is subjective, but i have a 2mp camera already and am trying
    to figure out if the difference is worth it. i have have been looking for a
    side by side print comparison but cannot find one.
    grilla, Dec 1, 2004
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  2. It depends what you do with the 8 x 10! If you view it really close up,
    yes, the 2MP will be noticeably worse than the 6MP. Viewed at arm's
    length 3.3MP, is enough for an 8 x 10, perhaps 2MP from a camera with very
    good optics would be "acceptable".

    David J Taylor, Dec 1, 2004
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  3. grilla

    Terence Guest

    All else being equal, a 6mp 8x10 print will be much much better than a
    2mp 8x10 print. A 2mp 8x10 offers a print resolution of about 160
    pixels/inch, compared to 280 pixels/inch for a 6mp print. That's a BIG
    difference. 300 pixels/inch is the ideal resolution for a good print.

    Post processing will help the 2mp image look smoother and relatively
    pleasing to the eye, but in the final analysis, you are still loosing
    out on 4mp of detail, which you can never get back, no matter what you

    For 4x6 prints, I doubt you will see a difference, although the 6mp
    image will give you a lot more room for cropping.

    Terence, Dec 1, 2004
  4. Are you referring to prints done at home? AFAIK photo services use 200dpi
    for prints of digital images.
    Yeah, true.

    Kind regards

    Robert Klemme, Dec 1, 2004
  5. grilla

    Terence Guest

    I will have to double-check at the Wal-Mart I get my prints done from,
    but from a purely observational point, I can see a difference between
    the 4x6 prints I submit at 300 dpi, compared to the 8x10 prints I've
    done (~190dpi)

    200dpi for a photo service just seems very low to me.
    Terence, Dec 6, 2004
  6. But keep in mind that photo services use a different printing process from
    your preferred laser or inkjet printer.


    Robert Klemme, Dec 7, 2004
  7. grilla

    Phantom Guest

    I must have missed the first part of this question somewhere along the
    way..........what resolution is suggested for pictures that are going to be
    printed at a photo service, and would you use a .jpeg, or .bmp file? This
    would be for 4x6 prints.
    Phantom, Dec 7, 2004
  8. grilla

    Terence Guest

    for a 4x6 print, I would try to stick with 1200x1800, although you
    probably won't notice the difference if you went a little lower than
    that (within reason).

    As far as the file format to use, jpeg is fine, so long as you don't
    continually save/re-save i.e. if you do a lot of post-processing. If
    you do post process, use any lossless format (tiff, bmp, etc....), then
    as a final step you can save as jpg and bring that to your photo
    service for printing.
    Terence, Dec 8, 2004
  9. grilla

    MartinS Guest

    I've found that the Wal-Mart self-serve reader won't take files larger
    than ~1MB.
    MartinS, Dec 21, 2004
  10. It's probably better to make a JPEG with more pixels, but with more
    compression as well, if you are limited in file size. You shouldn't need
    a lot of compression to make a 1200 x 1800 picture less than 1MB and still
    keep good quality. Try it and see.

    David J Taylor, Dec 21, 2004
  11. grilla

    MartinS Guest

    My (obsolete) HP 318 produces 1200 x 1800 images of 700-900KB at "best
    quality" setting. This is equivalent of saving a jpeg at 95% quality
    from a graphics editing program. Quality is excellent at 4 x 6 in.
    MartinS, Dec 21, 2004
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