# Help with Vignetting (D3300/Micro-Nikkor 40mm) **URL:** \ **Category:** Digital Camera Scanning\ **Created:** [August 23, 2024, 4:52pm UTC](https://forums.negativelabpro.com/t/help-with-vignetting-d3300-micro-nikkor-40mm/8099 "2024-08-23T16:52:13Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![ArnoG](https://avatars.discourse-cdn.com/v4/letter/a/ac8455/32.png) [@ArnoG](https://forums.negativelabpro.com/u/ArnoG)\ **Post date:** [August 27, 2024, 12:02pm UTC](https://forums.negativelabpro.com/t/help-with-vignetting-d3300-micro-nikkor-40mm/8099/6 "2024-08-27T12:02:32Z")
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… Also the link in the quoted post and the posts below… --- _[View the full topic](https://forums.negativelabpro.com/t/help-with-vignetting-d3300-micro-nikkor-40mm/8099)._