Nikon Corretion Diopters ? FYI

The Nikon web site has a page of useful information about eyepiece

correction lenses here:

 

http://www.nikonmall.com/buynikon_assets/Eyepiece_Compatibility_Chart_

040917.pdf

 

Some of the more interesting info there is:

 

With the standard, clear glass eyepiece, the viewfinder has a base

diopter value of ?1

 

The marked value of correction lenses is the combined diopter value

of the base viewfinder diopter value plus the actual diopter value of

the correction lens. (e.g. a +1 correction diopter has an actual

diopter value of +2).

 

A neutral correction lens has +1 diopter value and gives the

viewfinder a +/- 0.0 diopter value. It is not the same as the

standard eyepiece lens.

 

The apparent viewing distance of the viewfinder image is 1 meter.

Just adding to the above, since it appears that there's either a misprint or a font issue, the base diopter value should read "negative one."

Thanks Matt. Problem of writing posts in Word.