# New to OPENMV, How far away do I place my CAM?
**URL:** https://forums.openmv.io/t/new-to-openmv-how-far-away-do-i-place-my-cam/1694
**Category:** OpenMV Boards
**Created:** [March 21, 2020, 5:39am UTC](https://forums.openmv.io/t/new-to-openmv-how-far-away-do-i-place-my-cam/1694 "2020-03-21T05:39:16Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@TEANGA](https://forums.openmv.io/u/TEANGA)
#### Post date: [March 21, 2020, 5:39am UTC](https://forums.openmv.io/t/new-to-openmv-how-far-away-do-i-place-my-cam/1694/1 "2020-03-21T05:39:16Z")
How far away would I need to place the CAM from an object (iPad screen) that is approx 250mm x 175mm? I would like it to be as close as possible so the whole 250mm x 175mm would take up the whole FOV I would assume.
New to this world, so I am at a lost when it comes to degrees and FOV and distance. If someone knows a good resource for me to learn I’d be grateful for it.
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### Author:  [@kwagyeman](https://forums.openmv.io/u/kwagyeman)
#### Post date: [March 21, 2020, 11:14pm UTC](https://forums.openmv.io/t/new-to-openmv-how-far-away-do-i-place-my-cam/1694/2 "2020-03-21T23:14:09Z")
Hi, see this: [Understanding Focal Length and Field of View | Edmund Optics](https://www.edmundoptics.com/knowledge-center/application-notes/imaging/understanding-focal-length-and-field-of-view/)
Then for the camera sensor size see the OV7725 data sheet and see the OpenMV Cam H7 product page for the lens focal length.
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### Author:  [@TEANGA](https://forums.openmv.io/u/TEANGA)
#### Post date: [March 21, 2020, 11:18pm UTC](https://forums.openmv.io/t/new-to-openmv-how-far-away-do-i-place-my-cam/1694/3 "2020-03-21T23:18:59Z")
Thank you. I will for sure check out that site, looks very informative.