Eye-Lens Comparison

Started Jul 4, 2012 | Discussions thread
Vlad S
Senior MemberPosts: 3,078Gear list
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F-stop
In reply to Alejandro Ruiz, Jul 7, 2012

Alejandro Ruiz wrote:

" This corresponds to an F-Stop of F/2.4 to F/18. However, vision is sharpest around F/5.6 which is why the eye tries to keep a moderate aperture."

just a question : I always heard that the eye max aperture was F/1.0.

Is your F/2.4 measure areal max i.e., for an eye after several minutes/hours in the dark?

The max F-stop is based on the formula A/F, where A=aperture, F=focal distance. Human iris can only open to about 8-9 mm. For the eye to be F/1.0 the pupil size would have to be larger than 20mm (3/4inch) I have never seen any person with a pupil this large, nor read about such cases.

Vlad

 Vlad S's gear list:Vlad S's gear list
Olympus OM-D E-M5 Panasonic Lumix G Vario 14-45mm F3.5-5.6 ASPH OIS Olympus M.Zuiko Digital ED 9-18mm 1:4.0-5.6 Panasonic Lumix G 20mm F1.7 ASPH Panasonic Lumix G Vario 100-300mm F4-5.6 OIS +2 more
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