My brother sent me an SD card of some photos he took with a compact camera. A couple of the files were in the 5.6MB range but most were 145 to 150KB. why would there be a disparity in the file size on the same card. The photos were not all taken on the same day.
Nikonian in LA (Lower Alabama)
#1. "RE: jpeg files sizes?f " | In response to Reply # 0
mfphoto1 Registered since 29th Oct 2005Mon 24-Dec-12 01:17 PM
Could be he changed the quality of the picture in the camera. So possibly the 5.6md files could be the highest quality file of the camera and the 145kb could be the lowest quality.
"Step into my world and see as I see"
My Nikonians Gallery
Visit my Nikonians gallery.
#2. "RE: jpeg files sizes?" | In response to Reply # 0
esantos Nikonian since 10th Nov 2002Mon 24-Dec-12 02:46 PM
Check the resolution (pixels per inch) as well as the size of the image in pixels. Many point and shoot cameras shoot jpegs at 72 ppi. Okay for web use but not for printing beyond 4x6.
esartprints.com Ernesto Santos Photography
#4. "RE: jpeg files sizes?" | In response to Reply # 0
Also, the files may be of different format. For example, a large one might be a TIFF file with no compression, and the smaller ones might be JPEGs with considerable compression (often called "quality" as in Basic, Normal, Fine, etc).
Additionally, formats that include compression (such as essentially all JPEG, some TIFF, and some others) may compress different subjects in very, very different amounts. As only the most extreme example, if you take a picture of random noise, that will not compress very much, and it will present a relatively large file. At the other extreme, if you take a picture of a perfectly evenly lit wall with just one color, that file will compress a LOT more, possibly by a factor of 20x.
And it is entirely possible that all of the above are in play in any given scenario.
Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!