Originally Posted by jswinden
The average human retina (20/20 vision) can no longer distinguish between two pixels when the field of view (FOV) angle is 0.000333 radians. Steve Jobs used this to say a 300 dpi screen held 10" from the eyes (retina) would not show pixels to the average human eye. We can apply that principle mathematically to determine at what distance various resolution screens need to be held in order to no longer distinguish between two pixels, that is, see individual pixels.
Here is a comparison list of commonly available devices:
- For 326 ppi, distance required for no pixelization = 9.2" (iPhone5)
- For 268 ppi, distance required for no pixelization = 11.2" (iPad3)
- For 216 ppi, distance required for no pixelization = 13.9" (Fire HD, Nexus 7)
- For 170 ppi, distance required for no pixelization = 17.6" (original Fire)
- For 162 ppi, distance required for no pixelization = 18.5" (iPad Mini)
- For 132 ppi, distance required for no pixelization = 22.7" (iPad1 and 2)
I had been somewhat curious about this recently when trying to explain why certain things one of my devices looked different than the same things on the fondleslab my mom owns. I probably wasn't explaining it right, but this is good to know. Never really thought about it this way. Kinda like finding the optimum viewing distance for various HDTVs and such. Thanks for sharing this.
Back on topic -
A co-worker of mine was given a min
iPad by her lovey-person. It's an alright looking device. Certainly looks better for some things than the original Fire, but I wouldn't get one personally.