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JPEG file size much smaller when converting from TIFF

New Here ,
Oct 05, 2020

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Hi there community,

 

I have recently started using Nikon Capture NX-D to "pre-convert" the RAW files of my Nikon D750. The Nikon software just does a great job with the colors and camera settings, etc. In a second step, however, I import the images into Lightroom, which is obviously the richer tool for fine tuning. 

 

I have tried two paths to do this: 

 

1. Export the RAW file as a JPEG from NX-D

2. Export the RAW file as a 16 bit TIFF from NX-D

 

When I import the JPEG and TIFF into Lightroom and then export both as JPEGs, I notice that the JPED-based JPEG file is significantly larger (from 1/3 larger up to twice the size) than the TIFF-based JPEG file. However, the quality seems to be almost identical. At 100 % the difference is imperceptable. At 200, 300, 400, 500 % some difference becomes visible but is basically negligable (and at that level of maginification the slightly less detailed TIFF-based JPEG doesn't necessarily look worse to me). 

 

Does anybody have an explanation for such a big difference in file size with hardly any difference in image quality? Am I missing something? If anything, I would have expected the difference in file size to be the other way around, with the lossless TIFF file as a base producing the larger JPEG file with more detail.

 

If there is truly no (noticable) difference in quality, I would of course prefer the smaller files to save disk space. Even for large scale printing I guess the difference would be imperceptible. 

 

I am attching two sample images (TIFF-based JPEG and JPEG-based JPEG) and screenshots of their 100 % and 500 % magnification.

 

Thanks a lot for your help!

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Import and share, Windows

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JPEG file size much smaller when converting from TIFF

New Here ,
Oct 05, 2020

Copy link to clipboard

Copied

Hi there community,

 

I have recently started using Nikon Capture NX-D to "pre-convert" the RAW files of my Nikon D750. The Nikon software just does a great job with the colors and camera settings, etc. In a second step, however, I import the images into Lightroom, which is obviously the richer tool for fine tuning. 

 

I have tried two paths to do this: 

 

1. Export the RAW file as a JPEG from NX-D

2. Export the RAW file as a 16 bit TIFF from NX-D

 

When I import the JPEG and TIFF into Lightroom and then export both as JPEGs, I notice that the JPED-based JPEG file is significantly larger (from 1/3 larger up to twice the size) than the TIFF-based JPEG file. However, the quality seems to be almost identical. At 100 % the difference is imperceptable. At 200, 300, 400, 500 % some difference becomes visible but is basically negligable (and at that level of maginification the slightly less detailed TIFF-based JPEG doesn't necessarily look worse to me). 

 

Does anybody have an explanation for such a big difference in file size with hardly any difference in image quality? Am I missing something? If anything, I would have expected the difference in file size to be the other way around, with the lossless TIFF file as a base producing the larger JPEG file with more detail.

 

If there is truly no (noticable) difference in quality, I would of course prefer the smaller files to save disk space. Even for large scale printing I guess the difference would be imperceptible. 

 

I am attching two sample images (TIFF-based JPEG and JPEG-based JPEG) and screenshots of their 100 % and 500 % magnification.

 

Thanks a lot for your help!

TOPICS
Import and share, Windows

Views

16

Likes

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
Oct 05, 2020 0

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