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| Formula for calculating the FoV of lenses? | |
| Author | Message |
|---|---|
| jan normandale Joined: 13 Nov 2007 Posts: 30 |  Posted: Tue Oct 27, 2009 7:46 pm Post subject: Formula for calculating the FoV of lenses?I know we all talk about image circles and lens sizes but I'd like to calculate the field of view of lenses. I went to our FAQ's and most of the formulae regard hyperfocals, image circles etc Can someone steer me to a set of formulae for determining FoV for various lenses using a 4x5 back? Better still would be one of those websites that have calculators built in. thanks Jan |
| 45PSS Joined: 28 Sep 2001 Posts: 4081 | Posted: Tue Oct 27, 2009 8:02 pm See fcalc @ http://www.tangentsoft.net/ |
| Dan Fromm Joined: 14 May 2001 Posts: 2165 | Posted: Tue Oct 27, 2009 9:40 pm If the lens covers 4x5, the angle that the film will see, in Excel, is =2*degrees(atan(76/f)), where f is the lens focal length in mm. |
| jan normandale Joined: 13 Nov 2007 Posts: 30 | Posted: Wed Oct 28, 2009 12:26 am 45PSS, thanks for the link it looks like a good one Dan, I had a hunch I'd hear from you. Thanks for the XL formula. How've you been? Did you get any photography in this summer? |
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