# Lens to Film Distance Chart: Essential Guide for Different Lenses, Sensors, and Film Formats **URL:** \ **Category:** Digital Camera Scanning\ **Created:** [July 23, 2024, 12:10am UTC](https://forums.negativelabpro.com/t/lens-to-film-distance-chart-essential-guide-for-different-lenses-sensors-and-film-formats/8021 "2024-07-23T00:10:26Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Digitizer](https://avatars.discourse-cdn.com/v4/letter/d/57b2e6/32.png) [@Digitizer](https://forums.negativelabpro.com/u/Digitizer)\ **Post date:** [July 23, 2024, 5:02am UTC](https://forums.negativelabpro.com/t/lens-to-film-distance-chart-essential-guide-for-different-lenses-sensors-and-film-formats/8021/2 "2024-07-23T05:02:34Z")
@VladS , thank you for your work here, it might help to set up scanning gear more easily when the lens models you tested are used. A while ago, I noticed that my setup did not correspond to what was expected from theoretical considerations due to lens _[breathing](https://en.wikipedia.org/wiki/Breathing_(lens))_. Find more about the consequences here: > [@Equivalent Focal Length And DOF @ Scanning Distances](https://forums.negativelabpro.com/t/equivalent-focal-length-and-dof-scanning-distances/1982): > > All the DOF calculators I looked at were - and probably still are - based on the laws of optics of an ideal, infinitely thin lens. Within this theoretical model and the cases we’re talking about in this part of the forum, the distance between sensor and film should be 400mm when a 100mm lens is used to capture e negative with a scale of 1:1. The usual camera lens is everything but infinitely short, which suggests that calculations based on theoretical models might still apply, but in a complete… I expect every macro lens to have different breathing and therefore, each setup needs to be adjusted individually. --- _[View the full topic](https://forums.negativelabpro.com/t/lens-to-film-distance-chart-essential-guide-for-different-lenses-sensors-and-film-formats/8021)._