diopter correction lenses for the eyepiece

Discussion in 'Digital SLR' started by Bob S, Jun 22, 2007.

  1. Bob S

    Bob S Guest

    Does anyone out there have experience with add-on diopter correction
    lenses for DSLR eyepieces? Are they effective? Do they add so much
    thickness that you cannot see the whole screen? Do you use them with
    or without your glasses?

    What is the "virtual distance" to the screen?

    I am old enough to have very little accommodative power left, so I
    would probably need a close guess at the right distance and thus
    correction power.

    Bob S
     
    Bob S, Jun 22, 2007
    #1
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  2. Bob S

    Charles Guest


    I use one on my Canon DRebel. It works fine, it's not at all
    obtrusive unless I want to put something else on the viewfinder.

    I like to use the camera without glasses. I wanted a plus 1, had to
    get a plus 2 and dial in a minus 1 with the built-in diopter
    adjustment in the camera.

    I don't know the virtual distance. Me needing a plus 1 would
    indicate that it's at infinity. My distance correction is plus 1.
     
    Charles, Jun 22, 2007
    #2
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  3. Your choice, though the choice changes the diopter strength
    unless your prescription and eyesight are both best at one meter
    (my glasses are...) and you cannot use the VF variable-diopter
    feature to do what you want.
    Usually about a meter, modified by the setting on the VF diopter
    adjustment. BTW, I made up a 4-way glasses arrangement that
    gives both ideal camera viewing and ideal general seeing - see it
    at - http://www.donferrario.com/ruether/articles.html#glasses
     
    David Ruether, Jun 22, 2007
    #3
  4. Richard J Kinch, Jun 23, 2007
    #4
  5. Bob S

    Paul Furman Guest

    I wear progressive bifocals (no line) and it seems to me I can focus
    fine at any distance so the viewfinder diopter stays zeroed out. The way
    to tune that is make the numbers, info at the bottom & grid sharp. With
    glasses it's at zero, without it's +2 tics on the adjustment. I can't
    easily read the top LCD without the bottom of the bifocals.
     
    Paul Furman, Jun 23, 2007
    #5
  6. Bob S

    Richard H. Guest

    My $.02 ... it'll adjust for diopter, but not for other conditions like
    astigmatism (i.e., if you're trying to displace the need for glasses).
    Nikon's add about 3/16" behind the eyecup. No problem viewing the whole
    screen.

    I considered grinding a prescription lens to fit a diopter adjuster
    frame, only to discover that astigmatism has an axis (so the solution
    wouldn't work in both portrait and landscape camera orientations).

    In the end, it was less satisfying but easier to just leave the glasses
    on when shooting. :)

    Cheers,
    Richard
     
    Richard H., Jun 24, 2007
    #6
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