1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Welcome to Lightroom Forums! We're a friendly bunch, so please feel free to register and join in the conversation. If you're not familiar with forums, you'll find step by step instructions on how to register and post your first thread under Help on the menubar above. You're also welcome to join our newsletter, download our free Lightroom Quick Start eBook and explore our other FAQ resources.
    Dismiss Notice

Viewing file size in mac

Discussion in 'Website Suggestions, Comments & Troubleshooting' started by Maria Falconer, Aug 6, 2017.

  1. Maria Falconer

    Maria Falconer New Member

    Joined:
    Nov 21, 2016
    Messages:
    5
    Lightroom Experience:
    Intermediate
    Primary OS:
    Mac 10.12.x Sierra
    Lightroom Version:
    6.7 / CC 2015.7
    Lightroom License:
    CC Subscription
    Hi all
    I have a problem that I hope someone can help with. I've been using LR for years - since V1. I'm not an expert but comfortable with the programme. I am a professional photographer and two days ago I edited my RAW files on my new laptop (MacBook pro) and exported the files as .jpgs 10" longest side @300 ppi. When I look at the file in the finder window however it is telling me that it's only 229kb - when I open it in photoshop it appears to be the full size. The client returned the files saying they were low res so out of desperation I exported the catalogue to my old MacBook air and again exported as .jpg's 10" @300 ppi. This time they showed in the finder as 2.8Mb. So today when I got home I loaded both files onto my desktop and low and behold they both appear to be identical in photoshop but in finder window they are completely different sizes. Kuo-shin-45.jpg Kuo_shin-45.jpg I've attached both files here.
    Is it possible that the finder is reading the size of the thumbnail - even though when click on info it still tells me the same? Or is there some other devilment at work here :) Completely flummoxed and any ideas appreciated.
     
  2. JohanElzenga

    JohanElzenga Lightroom Guru Staff Member Lightroom Guru

    Joined:
    Jul 2, 2015
    Messages:
    4,990
    Location:
    Netherlands
    Lightroom Experience:
    Power User
    Primary OS:
    Mac 10.12.x Sierra
    Lightroom Version:
    6.12 / CC 2015.12
    Lightroom License:
    CC Subscription
    The file size on disk is determined by the level of jpeg-compression. The file size that Photoshop shows is the uncompressed size. Apparently you used different levels of compression (quality setting) in the export dialog, but often that difference is not detectable to the human eye.
     
  3. Maria Falconer

    Maria Falconer New Member

    Joined:
    Nov 21, 2016
    Messages:
    5
    Lightroom Experience:
    Intermediate
    Primary OS:
    Mac 10.12.x Sierra
    Lightroom Version:
    6.7 / CC 2015.7
    Lightroom License:
    CC Subscription
    I t
     
  4. Maria Falconer

    Maria Falconer New Member

    Joined:
    Nov 21, 2016
    Messages:
    5
    Lightroom Experience:
    Intermediate
    Primary OS:
    Mac 10.12.x Sierra
    Lightroom Version:
    6.7 / CC 2015.7
    Lightroom License:
    CC Subscription
    Johan - you are correct!! Thanks so much. When I noticed that the quality slider was down I did a test with it back to 100 but in the chaos and panic I think I actually then looked at the wrong file, leading me to believe that that wasn't the issue. I've just done another test however and it appears to be the case - thanks so muchh for help.
     
  5. Maria Falconer

    Maria Falconer New Member

    Joined:
    Nov 21, 2016
    Messages:
    5
    Lightroom Experience:
    Intermediate
    Primary OS:
    Mac 10.12.x Sierra
    Lightroom Version:
    6.7 / CC 2015.7
    Lightroom License:
    CC Subscription
    Johan - could I ask then.....presumably not good to use this kind of compression because there will be loss of quality, even though photoshop shows the same number of pixels?
     
  6. Hal P Anderson

    Hal P Anderson Lightroom Guru Staff Member Lightroom Guru

    Joined:
    May 12, 2011
    Messages:
    2,289
    Location:
    Canada
    Lightroom Experience:
    Advanced
    Primary OS:
    Windows 10
    Lightroom Version:
    6.12 / CC 2015.12
    Lightroom License:
    CC Subscription
  7. Maria Falconer

    Maria Falconer New Member

    Joined:
    Nov 21, 2016
    Messages:
    5
    Lightroom Experience:
    Intermediate
    Primary OS:
    Mac 10.12.x Sierra
    Lightroom Version:
    6.7 / CC 2015.7
    Lightroom License:
    CC Subscription
    thanks Hal - most interesting :)
     

Share This Page