# Orthographic Camera Display Size issue

**URL:** <https://discourse.threejs.org/t/orthographic-camera-display-size-issue/39755>\
**Category:** Questions\
**Tags:** orthographic-camera\
**Created:** [June 28, 2022, 1:05pm UTC](https://discourse.threejs.org/t/orthographic-camera-display-size-issue/39755 "2022-06-28T13:05:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![crizzis](https://avatars.discourse-cdn.com/v4/letter/c/eada6e/32.png) [@crizzis](https://discourse.threejs.org/u/crizzis)\
**Post date:** [June 28, 2022, 1:05pm UTC](https://discourse.threejs.org/t/orthographic-camera-display-size-issue/39755/1 "2022-06-28T13:05:43Z")

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An orthographic camera with a zoom of 1 and `camera.left` -10 `camera.right` +10 should fully display a grid of size 20units.

For some reason it ain’t working like this. If I wan’t a camera size of 20units being shown than I either need a zoom level of 0.5 or camera.left -20 right +20.

Where is my mistake?

I use Three R124

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<div class="post-metadata">

**Author:** ![vielzutun.ch](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/vielzutun.ch/32/21366_2.png) [@vielzutun.ch](https://discourse.threejs.org/u/vielzutun.ch)\
**Post date:** [June 28, 2022, 1:34pm UTC](https://discourse.threejs.org/t/orthographic-camera-display-size-issue/39755/2 "2022-06-28T13:34:08Z")

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Please provide working live code like in [JSFiddle](https://jsfiddle.net) or [CodePen](https://codepen.io), which demonstrates your issue…