Focus distance equal across the entire frame?

Started Mar 14, 2014 | Discussions thread
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Biggs23 MOD Veteran Member • Posts: 4,073
Focus distance equal across the entire frame?

Please forgive the title, I wasn't sure what the best what would be to succinctly summarize my question.

Anyway, my question concerns the in focus portion of an image throughout the FOV. Let's say that my subject is 10' away, is perfectly centered in the frame, and focus is perfectly on her eye. Going away from the perfect center of the frame towards the edges, what distance is the focal plane? Does it remain at exactly 10' perfectly parallel to the sensor or does the distance change with the curvature of the lens?

I ask because I have an upcoming project where I will need 5-7 items spaced several feet apart to be in decent focus while shooting at f/1.4.

Thanks for any information you can provide!

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