• Global community
    • Language:
      • Deutsch
      • English
      • Español
      • Français
      • Português
  • 日本語コミュニティ
    Dedicated community for Japanese speakers
  • 한국 커뮤니티
    Dedicated community for Korean speakers
Exit
4

Exported tiffs are double the file size of original imported tiffs despite only applying minor edits

New Here ,
Feb 16, 2024 Feb 16, 2024

Copy link to clipboard

Copied

Hi all,

I want to import tiffs into lightroom classic, apply very minor edits (minor crops and minor straightening) and then export the images again as tiffs. Currently when I try this, the exported tiffs are over twice the file size as the originals and the bit depth increases from 8 to 24. I'm quite new to image editing and I don't understand why this is happening/if there's a way to keep the file size pretty much the same as the original? I've attached images showing the details of my imported image (17.2MB) vs the exported image after using the straightening tool (49.1MB) and my export settings in lightroom. Any explanation would be appreciated!

TOPICS
Windows

Views

204

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines

correct answers 1 Correct answer

Community Expert , Feb 16, 2024 Feb 16, 2024

Are these B&W photos? It looks like the original TIFF was greyscale (8 bits), but Lightroom Classic does not support greyscale. So after editing and exporting an edited copy, those copies are now 24 bits color images (even if the photo is still B&W, which simply means all three color channels are identical). 

 

Votes

Translate

Translate
Community Expert ,
Feb 16, 2024 Feb 16, 2024

Copy link to clipboard

Copied

Are these B&W photos? It looks like the original TIFF was greyscale (8 bits), but Lightroom Classic does not support greyscale. So after editing and exporting an edited copy, those copies are now 24 bits color images (even if the photo is still B&W, which simply means all three color channels are identical). 

 

-- Johan W. Elzenga

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
New Here ,
Feb 16, 2024 Feb 16, 2024

Copy link to clipboard

Copied

Ahh yes, the originals are B&W (captured on a microfilm scanner) so that sounds like the root of the issue, thank you so much! Is there a program you'd recommend that supports greyscale but is as easy for making mass crops/straightening as lightroom is? I'm working with between 400-800 photos at a time for reference. 

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Community Expert ,
Feb 16, 2024 Feb 16, 2024

Copy link to clipboard

Copied

LATEST

Your export settings show that you do not compress the exported TIFFs. Try LZW compression. That is lossless and may make the TIFFs as small as the original ones.

 

-- Johan W. Elzenga

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines