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Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder

B&H # NIDM2N80 Mfr # 2945
In Stock
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You Pay: $10.95
Product Highlights
  • For D300, D200, D100, D90, D80, D70, D60, D50, D40, N80, N75, N70, N65, N60, N55, N50, Pronea, N2-4-5-6000 Series & FM/FE10 Cameras

Optional Nikon eyepiece diopters allow you to optimize your SLR viewfinder's sharpness in conjunction with your individual eyesight. Nikon SLR cameras (without built-in adjustable eyepiece correction) have a base diopter value of minus one. Minus one is considered the optimum starting point for the majority of SLR users with normal vision. The combination of the camera's viewfinder components and a clear (standard) eyepiece form a virtual image of a subject on the camera's focusing screen that is the approximate equivalent of a viewing distance of one meter.

Each Nikon eyepiece diopter incorporates a numerical value, represented by a minus value (nearsighted) or a plus value (farsighted) number, enabling you to select the appropriate diopter for your vision and your camera model.

The eyepiece's diopter value is, when combined with the viewfinders minus one value, the end-result value. No combination of the camera's base value of minus one and a given accessory diopter's value is required to arrive at the final desired value. In other words, if you require a diopter of plus 3, simply add a plus 3 diopter to your camera.

Please click here for a Compatibility Chart .

REVIEW SNAPSHOT®

by PowerReviews
NikonDK-20C -2 Diopter for Rectangular-Style Viewfinder
 
4.7

(based on 10 reviews)

Ratings Distribution

  • 5 Stars

     

    (7)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (4)
  • Lightweight (3)

Cons

    Best Uses

        • Reviewer Profile:
        • Casual photographer (3), Semi-pro photographer (3)
        • Was this a gift?:
        • No (7)

      Reviewed by 10 customers

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      Displaying reviews 1-10

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      5.0

      Great price!!!

      By Vdn34a

      from NJ

      Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

      Great price! Fits my FM10 and D90 perfectly

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      4.0

      Works great but not Nikon perfect

      By Photo Eyes

      from Phoenix, AZ

      About Me Pro Photographer

      Verified Buyer

      Pros

      • Easy to Use
      • Great Picture Quality
      • Lightweight

      Cons

      • Flimsy Construction

      Best Uses

        Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

        It performs its function well, image clarity is excellent, but it does have a few issues one would expect to be absent from any kind of Nikon optics.First, the -2 diopter value seems is questionable, a little math puts it more at a -1 value than a -2. But since other factors could be just as questionable, the actual diopter value would have to be verified by calibrated equipment.Second, the plastic frame quality lacks the Nikon feel, instead it feels cheap in mechanical strength and surface texture.The biggest issue though, is that the rubber eyecup it replaced does not fit over this viewfinder. It goes in 2/3's of the way and no more by any means.The last issue was found instantly after pulling the viewfinder out of it's small plastic bag. A giant thumbprint covering nearly the whole lens was found on one side of the lens surface.In the end, after a few workarounds, this viewfinder worked as expected. The workarounds were:1) Set the camera's diopter adjustment to the min. of -1.7, instead of -0.7 as originally expected.2) Ignore the cheap plastic frame3) Don't use a rubber eyecup over it4) Clean the lens well before installationIt's clear & eyeglass-free camera viewfinding afterwards, as expected.

        • Was this a gift?:
        • No

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        5.0

        just the thing I needed

        By ds.techie

        from Baltimore, MD

        About Me Semi-pro Photographer

        Verified Buyer

        Pros

        • Economic
        • Great Visibility
        • Lightweight

        Cons

        • Difficult to install
        • Flimsy Construction

        Best Uses

        • If You Wear Glasses

        Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

        I did not even know that these existed for Nikon DSLRs, until I saw them accidentally at Nikon's website. I just thought that those minor dioptre adjustments in the camera were inadequate, and probably I have to wear contacts to use my camera properly!What a difference! I can now read the display at the bottom of the view-finder clearly without my glasses! I can view the display clearly, and actually use the manual focussing accurately!Two words of caution: (1) fit this slowly, firmly and properly the first time before putting in the rubber cup. Because they are so tight, you cannot make further adjustments later on. Remove the rubber cup by sliding up, Clean the channels on two sides, the glass on the camera-body before putting it on. Finally clean the rubber eyepiece, to be put on last. (2) Have your eyes checked at an optometrist recently, decide which eye you will be always using, then buy one (+3,+2,+1,-1,-2,-3) with the closest power. If your eyes have higher power, you might fit two, one after the other - it works! Finally, if you have high cylindrical, then contacts might be the only option for you.They are cheaper at B&H than at Nikon's website!

        • Was this a gift?:
        • No

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        5.0

        great product

        By OTH

        from Dubai,UAE

        About Me Casual Photographer

        Verified Buyer

        Pros

          Cons

            Best Uses

              Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

              I used it with my Nikon D5100 and finally I can see all the settings clearly on my eye viewer..

              • Was this a gift?:
              • No

              Share this review

               
              5.0

              Helps My Aging Eye

              By Herman33

              from McDonough, GA

              About Me Casual Photographer

              Verified Buyer

              Pros

              • Compact
              • Easy to Use

              Cons

                Best Uses

                  Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

                  I use this product with my Cosina C1s and Voigtlander VSL43 single lens reflex cameras. (Viewfinder accessories that fit the Nikon FM10 camera also fit these cameras.)

                  Due to my age (80 years) focusing a SLR camera is becoming increasingly difficult. This -2 diopter is just what I needed to help with that.

                  • Was this a gift?:
                  • No

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                  5.0

                  Make shooting easier!

                  By Randyman

                  from Long Beach, CA

                  About Me Casual Photographer

                  Verified Buyer

                  Pros

                  • Durable
                  • Lightweight

                  Cons

                  • None

                  Best Uses

                  • Everything

                  Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

                  Nikon product. Fits and functions as it should. Makes a big difference for us eyeglass wearers.

                  • Was this a gift?:
                  • No

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                  5.0

                  Diopter

                  By Fitzy

                  from Neenah, Wis.

                  About Me Semi-pro Photographer

                  Pros

                    Cons

                      Best Uses

                        Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

                        Nikon N65 camera ...it works perfect !!!

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                        (1 of 1 customers found this review helpful)

                         
                        4.0

                        Fits-sorta

                        By Ms_Stephe

                        from Atlanta GA

                        About Me Semi-pro Photographer

                        Verified Buyer

                        Pros

                          Cons

                            Best Uses

                              Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

                              Optically, it solved my problem with the diopter adjustment on my D200 not going far enough to see without my glasses (I'm near sighted). It fits nice and snug on my D200 but the original rubber part this replaces doesn't fit in the gloove of this eyepiece. I have an olympus E410 and the rubber eyepiece from it fit this diopter so be aware, at least on a D200 the original eyecupthingie won't fit on this.

                              • Was this a gift?:
                              • No

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                              5.0

                              Works as designed

                              By Rod

                              from StLouis, MO

                              About Me Photo Enthusiast

                              Verified Buyer

                              Pros

                              • Compact
                              • Durable
                              • Easy to Use

                              Cons

                                Best Uses

                                  Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

                                  Fits all rectangular Nikon eyepieces (I use my on a Bessa-R and Spotmatic as well). Provides the correction I need on cameras without built-in diopters.

                                  • Was this a gift?:
                                  • No

                                  Share this review

                                   
                                  4.0

                                  Very Useful

                                  By JC

                                  from Ocoee, FL

                                  About Me Photo Enthusiast

                                  Verified Buyer

                                  Pros

                                  • Easy to Use
                                  • Improves Function

                                  Cons

                                  • Doesn't mate up to other

                                  Best Uses

                                  • Everyday Use
                                  • Macro Photography

                                  Comments about Nikon DK-20C -2 Diopter for Rectangular-Style Viewfinder:

                                  I purchased two of these, one for my D50, one for my D200 as I have to wear bifocals & finding the "sweet spot" to focus can be a bit trying. Both slipped easily on the intended cameras & improved my ability to achieve focus greatly. One thing tho--there always is one thing--the diopter piece will not slip into a Nikon DK-21m magnifying eyepiece. If you are nearsighted this is recommended

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