[photo-3d] Re: better viewers, myopia

[abram.klooswyk@xxxxxx]

Don Lopp Mar 24, 2001:
>As regards to better viewers how can viewers with 45mm and 
>60mm (as previously indicated ) be regarded as being better 
>when used with 35mm stereo cameras utilizing 35mm optics- a 
>bit not ortho.

John A. Rupkalvis 24 Mar 2001:
>When a person's vision only requires a moderate + or - diopter 
>correction, they can often remove their glasses and correct 
>with the focus control.

A 45 mm focal length in a viewer is (100/4.5) about 22 diopter.
For a person with -5 diopter myopia taking of his/her glasses 
is equivalent to adding +5 diopter. This roughly added to the 
viewer means 27 diopter, about 36 to 37 mm focal length. This 
comes close to orthostereoscopic viewing.

As I have said before to myopic stereoscopists: never have 
your myopia surgically "corrected". Easy freeviewing as well 
as more orthostereoscopic viewer usage are advantages of 
moderate myopia.

Abram Klooswyk


 

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