# Let's see your DSLR film scanning setup! **URL:** \ **Category:** Digital Camera Scanning\ **Created:** [March 16, 2019, 3:36am UTC](https://forums.negativelabpro.com/t/lets-see-your-dslr-film-scanning-setup/27 "2019-03-16T03:36:44Z")\ **Posts on this page:** 1\ **Showing post:** 262
**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, 3:24pm UTC](https://forums.negativelabpro.com/t/lets-see-your-dslr-film-scanning-setup/27/262 "2024-06-18T15:24:20Z")
For all of you using planar light sources: I just calculated the (inhomogeneous) distribution of light that one gets on the film as a function of panel dimensions and distance to the negative. It struck me how bad it really is if the panel is not infinite, so I’m sharing it here. The calculations seem to match what I see experimentally: > [@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… and more in detail: > **[Homogeneity of planar light sources for film scanning](https://www.arnogodeke.com/Blog/Homogeneity-of-planar-light-sources-for-film-scanning)** > > Calculating the light intensity over a negative that arrives from a planar light source Just my few cents for consideration when you’re building something… --- _[View the full topic](https://forums.negativelabpro.com/t/lets-see-your-dslr-film-scanning-setup/27)._