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Jan 3, 2017 at 9:47 comment added mattdm @MichaelClark "as close as possible"
Jan 3, 2017 at 6:48 history edited Michael C CC BY-SA 3.0
deleted 37 characters in body
Jan 3, 2017 at 6:34 comment added youcantryreachingme @mattdm - I stand corrected, and this is evident by examining any image taken with a shallow depth of field: the portion in focus runs linearly across the image, not in a curve. I have removed #1.
Jan 3, 2017 at 6:33 history edited youcantryreachingme CC BY-SA 3.0
Remove incorrect portion
Jan 3, 2017 at 5:12 comment added Michael C @mattdm Most lens designs attempt that. What they actually achieve is often a wavy shape that undulates back and forth and can be either closer or further at the edge than at the center (And that is when they are properly aligned). lensrentals.com/blog/2016/11/…
Jan 3, 2017 at 2:10 history answered youcantryreachingme CC BY-SA 3.0