Dmax for my Minolta Film Scanner vs. Epson 4990 ?

Discussion in 'Minolta' started by Terry Smith, Apr 25, 2006.

  1. Terry Smith

    Terry Smith Guest

    Hi all,

    I'd appreciate some advice. About two years ago, I bought a Minolta DiMAGE
    Scan Dual III film scanner for scanning of 35mm color transparencies, B&W
    negatives and color negatives.

    I'm now considering buying an Epson 4990 scanner for scanning my 4x5 film
    (again, both transparencies and negatives).

    The specs on the two units are as follows:

    =====

    Minolta DiMAGE Scan Dual III

    Optical Resolution: 2,820 DPI
    Color Depth: 16 bit
    Dynamic Range (Dmax): 4.8 (calculated)

    =====

    Epson 4990

    Optical Resolution: 4,800 x 9,600 DPI
    Color Depth: 48 bit
    Dynamic Range (Dmax): 4.0

    =====

    I'd like to sell my Minolta and do ALL my scanning with the new Epson. The
    Epson has much better resolution and color depth, but the Minolta has much
    better Dmax rating. With the exception of Dmax, the Epson is a clear
    winner. Does anyone have any experience with these types of devices to help
    me understand if the Epson (with it's lower Dmax rating) can produce 35mm
    scans equal to, or better than, the Minolta. Thanks in advance for any
    advice.

    Terry
     
    Terry Smith, Apr 25, 2006
    #1
    1. Advertisements

  2. My bet would be that the Minolta edges out the Epson on resolution as well
    as shadow detail capture.

    The reason is that the Epson is actually a 2400 ppi scanner that oversamples
    the image. It uses an "offset" CCD, which is two 2400 ppi CCDs half a pixel
    width offset, and steps the scanner at 4800 ppi. This _does_ improve
    resolution (and noise) over a simple 2400 ppi scanner, but probably doesn't
    bring it quite up to the 2800 ppi level.

    The even newer Epson V700 _might_ edge out your Minolta for 35mm work, if
    you scanned at 6400 ppi, applied noise reduction, and downsampled. If you
    think of it as a 3200 ppi scanner, you'll be closer to reality.

    David J. Littleboy
    Tokyo, Japan
     
    David J. Littleboy, Apr 25, 2006
    #2
    1. Advertisements

  3. Terry Smith

    Terry Smith Guest

     
    Terry Smith, Apr 25, 2006
    #3
  4. Terry Smith

    Terry Smith Guest

    Thank you David.


     
    Terry Smith, Apr 25, 2006
    #4
  5. Terry Smith

    Terry Smith Guest

    Many thanks to you as well Martin!


     
    Terry Smith, Apr 25, 2006
    #5
  6. Terry Smith

    Terry Smith Guest

    So can I assume the V700 should be much better with LF negs and trannies
    than the 4990?
     
    Terry Smith, Apr 25, 2006
    #6
  7. Terry Smith

    Terry Smith Guest

    So how did Epson get the Dmax on the 4990 up to 4.0 from the 4870's "up to
    3.8 ??
     
    Terry Smith, Apr 27, 2006
    #7
  8. Terry Smith

    Terry Smith Guest

    So how did Epson get the Dmax on the 4990 up to 4.0 from the 4870's "up to
    3.8 ??
     
    Terry Smith, Apr 27, 2006
    #8
  9. Terry Smith

    Terry Smith Guest

    So how did Epson get the Dmax on the 4990 up to 4.0 from the 4870's "up to
    3.8 ??
     
    Terry Smith, Apr 27, 2006
    #9
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.