Under exposed photos

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  • 3DEnthusiast
    3Dfollower
    • Jul 2019
    • 16
    #1

    Under exposed photos

    Hi there,

    My problem is this, I recently shot a series of images of part of an historic church here in Perth for inclusion in a larger photogrammetry dataset, and while the photos turned out fine, when I got them home and had a look at them on my monitor I realised to my horror that I had accidentally nudged the exposure compensation dial on my DSLR while shooting and as a result all the images that I had taken were now under exposed. Will correcting this under exposure in Photoshop render these images unusable in Zephyr ? Exposure compensation was originally set to off and was nudged to 7/10ths of a stop under exposed. I am using the latest version of Zephyr Lite, 7.5.31, and my DSLR is a Canon 5D MK III, with 50 mm lens, set to ISO 100, and f/8, auto white balance, autofocus.
    Tags: None
    • cam3d
      3Dflover
      • Sep 2017
      • 682
      #2
      Hey 3DEnthusiast - No stress! Are the photos in RAW? I recommend just running them through lightroom, bumping the exposure, and exporting as JPEG. The data obviously won't be perfect, but a little under-exposure is totally fine, esp with your lower ISO and F/8 - If you have any issues running the fixed exposure images let me know and I'll guide you in the correct direction to resolve the issue.

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        • 3DEnthusiast
          3Dfollower
          • Jul 2019
          • 16
          #3
          Hi there cam3d,

          I like your profile icon, thanks for the speedy response. No, these images are not in RAW format, they were shot as .JPGS. Can I still run them through Lightroom, fix the exposure issue and carry on as normal? I have not experimented with RAW as yet. I have been dragging my feet on this issue due to the file size increase in shooting in RAW and not being a fan of post processing.

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            • cam3d
              3Dflover
              • Sep 2017
              • 682
              #4
              3DEnthusiast - Thanks :-)

              RAW is ideal, whereas JPEG will compress a bit each time you process and save it. I reckon in this case you're fine to just bump up the exposure. When they are run through LR take care not to accidently 'correct' the lens distortion (under Lens Corrections in LR) as Zephyr uses the 'uncorrected' image and corrects it internally :-) Save at highest possible JPEG settings to minimise compression and let me know how you go.

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