Site Sponsors
Results 1 to 6 of 6

Thread: Question Re Pixel Shift and Lens Performance

  1. #1
    Senior Member
    Join Date
    Feb 2015
    Posts
    389
    Post Thanks / Like

    Question Re Pixel Shift and Lens Performance

    Just a general question about lens performance and pixel shift. I plan on using the S1R as a scanner, so multishot is important to me. As is the ability to actually render detail.

    Great macro lenses can probably out resolve the 47mp sensor, and maybe even the new 60mp sensors. But 187? That seems like a stretch...

    However, since pixel shift is essentially doing a bunch of samples, so is the resulting file subject to the same limitations as a theoretical actual 187mp sensor? The image samples I've seen seem to be fantastic, so this is just something I'm curious about.

  2. #2
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Missouri, USA
    Posts
    5,536
    Post Thanks / Like
    Images
    150

    Re: Question Re Pixel Shift and Lens Performance

    Since you are sampling at the frequency of the native resolution, pixel shift is simply filling in the space between the pixels and so the lens does not have to resolve at the same resolution of a 187MP sensor. But if the image is soft at the native resolution, it will be appear softer in the shifted file. Also, at 100% monitor view, you are still going to have the same DoF as a 187MP sensor meaning film flatness will still be an issue if you are trying to get the most information out of the reproduction.

  3. #3
    New Member
    Join Date
    Dec 2019
    Location
    Palm Springs CA
    Posts
    1
    Post Thanks / Like

    Re: Question Re Pixel Shift and Lens Performance

    Quote Originally Posted by Speedgraphic View Post
    Just a general question about lens performance and pixel shift. I plan on using the S1R as a scanner, so multishot is important to me. As is the ability to actually render detail.

    Great macro lenses can probably out resolve the 47mp sensor, and maybe even the new 60mp sensors. But 187? That seems like a stretch...

    However, since pixel shift is essentially doing a bunch of samples, so is the resulting file subject to the same limitations as a theoretical actual 187mp sensor? The image samples I've seen seem to be fantastic, so this is just something I'm curious about.
    I just tested this procedure in my studio with the S1R and a Leica 90mm lens. The multishot image is an impressive 187 megapixel file, however visually, these images have all the aesthetic attributes of an interpolated file. Back in the Better Light scanning days, you could scan half pixels in the scan direction, getting 150% more pixels, but the resulting file looked interpolated to us, henceforth we always favor native resolution imaging workflows over interpolated, regardless of how sophisticated the methodology.

  4. #4
    Member
    Join Date
    Jun 2009
    Location
    Vienna, Austria
    Posts
    162
    Post Thanks / Like

    Re: Question Re Pixel Shift and Lens Performance

    I made some preliminary test with the HighResolution mode on the S1 (96MP files). While the results are impressive, there seem to be some small artifacts generated by the multi shots. I'm talking about the small dots inside the black "4" and "8" lettering.

    best,

    geb
    Click image for larger version. 

Name:	Screen Shot 1.jpg 
Views:	11 
Size:	333.5 KB 
ID:	146340

  5. #5
    Senior Member
    Join Date
    May 2013
    Location
    SF Bay Area
    Posts
    366
    Post Thanks / Like
    Images
    3

    Re: Question Re Pixel Shift and Lens Performance

    Quote Originally Posted by gebseng View Post
    I made some preliminary test with the HighResolution mode on the S1 (96MP files). While the results are impressive, there seem to be some small artifacts generated by the multi shots. I'm talking about the small dots inside the black "4" and "8" lettering.

    best,

    geb
    Click image for larger version. 

Name:	Screen Shot 1.jpg 
Views:	11 
Size:	333.5 KB 
ID:	146340
    Did you use Mode1 or Mode2?

  6. #6
    Member
    Join Date
    Jun 2009
    Location
    Vienna, Austria
    Posts
    162
    Post Thanks / Like

    Re: Question Re Pixel Shift and Lens Performance

    Quote Originally Posted by SrMphoto View Post
    Did you use Mode1 or Mode2?
    This was Mode 1, but without movement in the subject there shouldn't be a difference.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •