# Color in center and edge

**URL:** <https://forums.negativelabpro.com/t/color-in-center-and-edge/7599>\
**Category:** Digital Camera Scanning\
**Created:** [March 24, 2024, 9:15am UTC](https://forums.negativelabpro.com/t/color-in-center-and-edge/7599 "2024-03-24T09:15:06Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![ArnoG](https://avatars.discourse-cdn.com/v4/letter/a/ac8455/32.png) [@ArnoG](https://forums.negativelabpro.com/u/ArnoG)\
**Post date:** [June 18, 2024, 3:17pm UTC](https://forums.negativelabpro.com/t/color-in-center-and-edge/7599/14 "2024-06-18T15:17:19Z")

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Read here:

> [@Integrating sphere as a uniform backlight](https://forums.negativelabpro.com/t/integrating-sphere-as-a-uniform-backlight/6302/58):
>
> Hi all, As mentioned in the first post in this forum thread, a finite planar light source (such as an LED panel) will always result in an inhomogeneous light distribution on film. A planar light panel a give a homogeneous light distribution on film, provided it is infinitely large compared to the film, which is not practical for table-top solutions. It took me a while to get this done, but I just calculated the brightness inhomogeneity on a film that results from using a planar light source tha…

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