What does "2500 pixels on the long dimension" mean?
Asked 4/6/2018
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2 answers
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A photo contest requires images to be "2500 pixels on the long dimension." I want to confirm what that means before resizing my files.
For example:
- If an image is 4800 × 3200, the long dimension is the width, so should I resize it to 2500 × 1667?
- If an image is 4000 × 6000, the long dimension is the height, so should I resize it to 1667 × 2500?
In other words, does "long dimension" simply mean the longest side of the image, whether that is width or height?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
8y ago
2 Answers
5
Exactly. And Lightroom and some image editors will allow you to export an image with a desired value for the "long edge" (rather than for desired width or height). It keeps your resize operations much more consistent, assuming you don't do a lot of cropping.
Originally by user74159. Source · Licensed CC BY-SA 4.0
user74159
8y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. The “long dimension” means the longest side of the image.
So:
- 4800 × 3200 → resize so the width becomes 2500 px
- 4000 × 6000 → resize so the height becomes 2500 px
When you resize, keep the aspect ratio the same, so the shorter side will scale automatically. In practice, that means neither width nor height should exceed 2500 px, and the longest side should be exactly 2500 px unless the contest says otherwise.
Many editors, including Lightroom and similar software, have an export or resize option for “long edge,” which makes this easy.
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