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JPbruins
JPbruins
Participant
June 3, 2019
Answered

Why is there JPEG file size difference at export Lr vs Lr Classic

  • June 3, 2019
  • 1 reply
  • 1095 views

Hi photo lovers,

In my adoption of the newest Lightroom (cloud-based) I noticed that the Full size JPEG export file size of Lightroom is much smaller than Lightroom Classic. See screenshot below.

I use the same RAW picture, exported unedited from both Lightroom and Lightroom Classic as full quality JPEG in sRBG color. In Classic that is with settings "quality 100" and in Lr  that is "full size JPEG".

However, the exported JPEG from Lightroom Classic is 13MB of size and the JPEG from Lightroom is 9,6MB of size.

My question: How can this be, where does the significant difference in file size come from?

More importantly: Does the newest Lightroom export JPEGs that are of lower quality versus the Lightroom Classic JPEGs?

I really hope an expert can explain me what is going on, otherwise I'm a bit hesitant on switching over from Classic to cloud-based Lightroom

BTW, I'm running on Lightroom Classic version 8.3 and Lightroom (cloud) version 2.3.

Bye,

JP

This topic has been closed for replies.
Correct answer Jim Wilde

Have a read of this article from Jeffrey Friedl, which should put your mind at rest: Jeffrey Friedl's Blog » An Analysis of Lightroom JPEG Export Quality Settings

1 reply

99jon
99jon
Legend
June 3, 2019

The difference will be down to compression. You are using a setting of 100 in Classic whereas Lightroom is probably around 90 for a slightly more efficient export without any noticeable loss of quality for most purposes. Adobe is rapidly adding new features to Lightroom, so I think we are bound to see more export options in future releases.

    JPbruins
    JPbruinsAuthor
    Participant
    June 3, 2019

    Hi 99jon,

    Thank you for the quick reply.

    It is a 33% difference in size size, do you believe that is the results of slight compression or is there more to it? It seems like a lot without any noticeable loss of quality.

    Is there a way we can get Adobe's technical answer to this? I think it will interest a lot of prosumers and pro's as it effects their output

    Jim Wilde
    Community Expert
    Jim WildeCommunity ExpertCorrect answer
    Community Expert
    June 3, 2019

    Have a read of this article from Jeffrey Friedl, which should put your mind at rest: Jeffrey Friedl's Blog » An Analysis of Lightroom JPEG Export Quality Settings

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